Native plants · Illinois

Native plants of Clark County

607 plant species are recorded as native to Illinois in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Clark County by USDA PLANTS. 272 of them have growing records you can filter by light, moisture, height and estimated cold hardiness. 5 more species are listed as both native and introduced and kept in a separate section.

County summary · USDA PLANTS and Kew WCVP

Clark County, Illinois

Native species: 607 Typical Illinois county: 641 (median of 102 counties)
Garden-ready natives: 272 Typical Illinois county: 272
Share by type (all 607 native species): Percent of the 607 native species in each growth type

Tree 13% (76)
Shrub 3% (18)
Wildflower (forb) 59% (357)
Grass or grass-like 17% (105)
Vine 5% (31)
Fern 3% (20)

Wildflowers make up the largest share of the native list (59%), followed by grasses and grass-like plants (17%).

Recorded native ranges can include long-established populations that spread from gardens; check your state’s native plant society list for local guidance. How native status is decided.

ZIP codes mainly in this county fall in USDA hardiness zones 6a to 6b (2023 map).

The native plant list

Garden-ready natives 272

Native species with PLANTS growing records (height, light, moisture, minimum temperature). “—” means PLANTS has no value.

Garden-ready native plants of Clark County, Illinois
Plant	Type	Height	Light	Water use	Hardy to
Allegheny blackberry Rubus allegheniensis	Shrub	6 ft	Shade-tolerant	Medium	Zone 4b
Allegheny serviceberry Amelanchier laevis	Tree	35 ft	Shade-tolerant	Medium	Zone 3b
alternateleaf dogwood Cornus alternifolia	Tree	25 ft	Shade-tolerant	Medium	Zone 2b
American basswood Tilia americana	Tree	100 ft	Shade-tolerant	Medium	Zone 2b
American beech Fagus grandifolia	Tree	80 ft	Shade-tolerant	Medium	Zone 3a
American bellflower Campanulastrum americanum	Wildflower (forb)	6 ft	Shade-tolerant	Medium	Zone 12b
American bittersweet Celastrus scandens	Vine	15 ft	Shade-tolerant	High	Zone 3b
American elm Ulmus americana	Tree	120 ft	Sun–part shade	High	Zone 2b
American hazelnut Corylus americana	Shrub	10 ft	Sun–part shade	Medium	Zone 4a
American hornbeam Carpinus caroliniana	Tree	30 ft	Shade-tolerant	Medium	Zone 4a
American pokeweed Phytolacca americana	Wildflower (forb)	7.3 ft	Shade-tolerant	Medium	Zone 4a
American sycamore Platanus occidentalis	Tree	100 ft	Sun–part shade	High	Zone 4a
American water horehound Lycopus americanus	Wildflower (forb)	1.8 ft	Shade-tolerant	High	Zone 3b
American water plantain Alisma subcordatum	Wildflower (forb)	6 in	Sun	High	Zone 4a
American water-willow Justicia americana	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4b
American wisteria Wisteria frutescens	Vine	50 ft	Shade-tolerant	Medium	Zone 7a
Appalachian blazing star Liatris squarrulosa	Wildflower (forb)	2.5 ft	Sun–part shade	Medium	Zone 7a
arrowleaf tearthumb Polygonum sagittatum	Vine	1 ft	Sun	Medium	Zone 6a
beaked agrimony Agrimonia rostellata	Wildflower (forb)	2.3 ft	Sun–part shade	Medium	Zone 4a
bearded beggarticks Bidens aristosa	Wildflower (forb)	3.5 ft	Sun–part shade	High	Zone 12b
big bluestem Andropogon gerardii	Grass or grass-like	6 ft	Sun	Low	Zone 2b
bigtooth aspen Populus grandidentata	Tree	65 ft	Sun	High	Zone 3a
bitternut hickory Carya cordiformis	Tree	75 ft	Sun	Medium	Zone 2b
black cherry Prunus serotina	Tree	80 ft	Sun	Medium	Zone 4a
black huckleberry Gaylussacia baccata	Shrub	4 ft	Shade-tolerant	Low	Zone 4a
black maple Acer nigrum	Tree	100 ft	Shade-tolerant	Medium	Zone 2b
black oak Quercus velutina	Tree	80 ft	Sun–part shade	Medium	Zone 4a
black walnut Juglans nigra	Tree	100 ft	Sun	High	Zone 4b
black willow Salix nigra	Tree	100 ft	Sun	High	Zone 1b
blackeyed Susan Rudbeckia hirta	Wildflower (forb)	1 ft	Sun	Medium	Zone 5a
blackgum Nyssa sylvatica	Tree	95 ft	Shade-tolerant	Medium	Zone 5b
blackhaw Viburnum prunifolium	Tree	16 ft	Shade-tolerant	Medium	Zone 4a
blue cohosh Caulophyllum thalictroides	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4a
bluejoint Calamagrostis canadensis	Grass or grass-like	4.9 ft	Sun	Medium	Zone 4a
blunt spikerush Eleocharis obtusa	Grass or grass-like	1.6 ft	Sun	Medium	Zone 11a
bluntleaf bedstraw Galium obtusum	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 4a
bog rush Juncus biflorus	Grass or grass-like	3.5 ft	Shade-tolerant	High	Zone 5b
boxelder Acer negundo	Tree	60 ft	Shade-tolerant	Medium	Zone 2b
bristly buttercup Ranunculus hispidus	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 4a
broadfruit bur-reed Sparganium eurycarpum	Wildflower (forb)	4.9 ft	Sun–part shade	High	Zone 4a
broadleaf arrowhead Sagittaria latifolia	Wildflower (forb)	4.9 ft	Sun	High	Zone 4a
broadleaf cattail Typha latifolia	Wildflower (forb)	5 ft	Sun–part shade	High	Zone 3b
broadleaf rosette grass Dichanthelium latifolium	Grass or grass-like	3.3 ft	Sun–part shade	Low	Zone 3a
broomsedge bluestem Andropogon virginicus	Grass or grass-like	3 ft	Sun	Medium	Zone 5b
bulbous bittercress Cardamine bulbosa	Wildflower (forb)	1.4 ft	Shade-tolerant	Medium	Zone 4a
bur oak Quercus macrocarpa	Tree	100 ft	Sun–part shade	Medium	Zone 3b
bur-reed sedge Carex sparganioides	Grass or grass-like	3 ft	Shade-tolerant	High	Zone 4a
burningbush Euonymus atropurpureus	Tree	10 ft	Shade-tolerant	Low	—
Bush's sedge Carex bushii	Grass or grass-like	2 ft	Sun–part shade	Medium	Zone 5a
butterfly milkweed Asclepias tuberosa	Wildflower (forb)	2 ft	Sun	Low	Zone 4a
butternut Juglans cinerea	Tree	80 ft	Sun	Medium	Zone 4a
calico aster Symphyotrichum lateriflorum	Wildflower (forb)	4 ft	Sun	Medium	Zone 4a
Canada germander Teucrium canadense	Wildflower (forb)	3.3 ft	Sun–part shade	High	Zone 3a
Canada goldenrod Solidago canadensis	Wildflower (forb)	3.5 ft	Sun	Medium	Zone 3a
Canada wildrye Elymus canadensis	Grass or grass-like	3 ft	Shade-tolerant	Medium	Zone 3a
Canadian horseweed Conyza canadensis	Wildflower (forb)	5 ft	Sun	Medium	Zone 12b
Canadian lousewort Pedicularis canadensis	Wildflower (forb)	1.3 ft	Shade-tolerant	Medium	Zone 3a
Carolina foxtail Alopecurus carolinianus	Grass or grass-like	1.7 ft	Sun	Low	Zone 3a
Carolina rose Rosa carolina	Shrub	5 ft	Sun–part shade	Low	Zone 3a
chinquapin oak Quercus muehlenbergii	Tree	70 ft	Sun	Medium	Zone 4a
climbing rose Rosa setigera	Vine	16 ft	Sun	Low	Zone 6a
cockspur hawthorn Crataegus crus-galli	Tree	30 ft	Sun	Low	Zone 4a
common blue violet Viola sororia	Wildflower (forb)	4 in	Sun–part shade	High	Zone 4b
common blue wood aster Symphyotrichum cordifolium	Wildflower (forb)	5 ft	Sun	Low	Zone 3b
common buttonbush Cephalanthus occidentalis	Tree	15 ft	Shade-tolerant	High	Zone 4a
common cowparsnip Heracleum maximum	Wildflower (forb)	8 ft	Sun	High	Zone 3b
common duckweed Lemna minor	Wildflower (forb)	—	Sun	High	Zone 3b
common evening primrose Oenothera biennis	Wildflower (forb)	5 ft	Sun	Medium	Zone 4b
common hackberry Celtis occidentalis	Tree	60 ft	Shade-tolerant	Low	Zone 2b
common hoptree Ptelea trifoliata	Tree	25 ft	Sun–part shade	High	Zone 4a
common persimmon Diospyros virginiana	Tree	55 ft	Shade-tolerant	Medium	Zone 5a
common rush Juncus effusus	Grass or grass-like	6.6 ft	Sun	Medium	Zone 3b
common selfheal Prunella vulgaris	Wildflower (forb)	1.5 ft	Sun–part shade	Medium	Zone 3b
common serviceberry Amelanchier arborea	Tree	36 ft	Shade-tolerant	Medium	Zone 2b
common sneezeweed Helenium autumnale	Wildflower (forb)	4.9 ft	Sun	Medium	Zone 3a
common winterberry Ilex verticillata	Tree	10 ft	Sun–part shade	High	Zone 4b
coon's tail Ceratophyllum demersum	Wildflower (forb)	—	Sun–part shade	High	Zone 3b
coralberry Symphoricarpos orbiculatus	Shrub	2 ft	Sun–part shade	High	Zone 5a
crested sedge Carex cristatella	Grass or grass-like	3 ft	Shade-tolerant	High	Zone 4a
cup plant Silphium perfoliatum	Wildflower (forb)	6 ft	Sun–part shade	—	Zone 2b
cutleaf coneflower Rudbeckia laciniata	Wildflower (forb)	8.2 ft	Shade-tolerant	Low	Zone 3b
deertongue Dichanthelium clandestinum	Grass or grass-like	2 ft	Sun	Low	Zone 4a
devil's darning needles Clematis virginiana	Vine	15 ft	Sun–part shade	Medium	Zone 3b
disk waterhyssop Bacopa rotundifolia	Wildflower (forb)	1 in	Sun	High	Zone 4a
ditch stonecrop Penthorum sedoides	Wildflower (forb)	2.6 ft	Sun–part shade	Medium	Zone 4b
dotted smartweed Polygonum punctatum	Wildflower (forb)	3.2 ft	Sun	Medium	Zone 10b
downy arrowwood Viburnum rafinesqueanum	Shrub	6 ft	Shade-tolerant	Low	Zone 3a
dwarf St. Johnswort Hypericum mutilum	Wildflower (forb)	2.6 ft	Sun–part shade	Medium	Zone 5a
eastern cottonwood Populus deltoides	Tree	190 ft	Sun	High	Zone 3a
eastern narrowleaf sedge Carex amphibola	Grass or grass-like	2 ft	Shade-tolerant	Medium	Zone 7a
eastern redbud Cercis canadensis	Tree	30 ft	Shade-tolerant	Low	Zone 4b
eastern redcedar Juniperus virginiana	Tree	50 ft	Sun–part shade	Low	Zone 3a
eastern woodland sedge Carex blanda	Grass or grass-like	2 ft	Shade-tolerant	High	Zone 4b
fall panicgrass Panicum dichotomiflorum	Grass or grass-like	3.3 ft	Sun	High	Zone 3a
false daisy Eclipta prostrata	Wildflower (forb)	3.2 ft	Sun–part shade	Medium	Zone 10b
field horsetail Equisetum arvense	Fern	11 in	Sun–part shade	High	Zone 3a
field paspalum Paspalum laeve	Grass or grass-like	2.9 ft	Sun–part shade	Medium	Zone 6a
flowering dogwood Cornus florida	Tree	30 ft	Shade-tolerant	Low	Zone 4b
fowl mannagrass Glyceria striata	Grass or grass-like	5.7 ft	Shade-tolerant	Medium	Zone 3b
fox sedge Carex vulpinoidea	Grass or grass-like	3.2 ft	Sun–part shade	Medium	Zone 3b
foxglove beardtongue Penstemon digitalis	Wildflower (forb)	4 ft	Shade-tolerant	Low	Zone 3b
fragrant flatsedge Cyperus odoratus	Grass or grass-like	2 ft	Sun	Medium	Zone 11b
Frank's sedge Carex frankii	Grass or grass-like	2 ft	Shade-tolerant	High	Zone 5a
fringed brome Bromus ciliatus	Grass or grass-like	4 ft	Shade-tolerant	Medium	Zone 7a
fringed sedge Carex crinita	Grass or grass-like	5.2 ft	Sun–part shade	Medium	Zone 4a
fringeleaf wild petunia Ruellia humilis	Wildflower (forb)	2.6 ft	Shade-tolerant	Low	Zone 4a
frost grape Vitis vulpina	Vine	83 ft	Sun–part shade	Medium	Zone 5a
giant goldenrod Solidago gigantea	Wildflower (forb)	8.2 ft	Sun–part shade	Medium	Zone 4a
golden ragwort Packera aurea	Wildflower (forb)	3.9 ft	Shade-tolerant	High	Zone 3a
gray dogwood Cornus racemosa	Shrub	10 ft	Shade-tolerant	Medium	Zone 2b
gray goldenrod Solidago nemoralis	Wildflower (forb)	2 ft	Sun	Medium	Zone 4a
graybark grape Vitis cinerea	Vine	50 ft	Sun–part shade	Medium	Zone 6b
greater straw sedge Carex normalis	Grass or grass-like	5 ft	Shade-tolerant	High	Zone 4a
green ash Fraxinus pennsylvanica	Tree	80 ft	Shade-tolerant	Medium	Zone 2b
green bulrush Scirpus atrovirens	Grass or grass-like	5.9 ft	Sun	Medium	Zone 2a
groundnut Apios americana	Vine	1 ft	Shade-tolerant	Medium	Zone 5a
hairy white oldfield aster Symphyotrichum pilosum	Wildflower (forb)	3 ft	Shade-tolerant	Medium	Zone 4a
harvestlice Agrimonia parviflora	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 4a
heartleaf peppervine Ampelopsis cordata	Vine	2 ft	Shade-tolerant	Medium	Zone 6b
honeylocust Gleditsia triacanthos	Tree	70 ft	Sun	Medium	Zone 3b
hophornbeam Ostrya virginiana	Tree	45 ft	Shade-tolerant	Low	Zone 3b
Indian woodoats Chasmanthium latifolium	Grass or grass-like	4.6 ft	Shade-tolerant	Medium	Zone 4a
Indiangrass Sorghastrum nutans	Grass or grass-like	6 ft	Sun	Medium	Zone 3b
Indianhemp Apocynum cannabinum	Wildflower (forb)	3.3 ft	Sun–part shade	High	Zone 3a
inland rush Juncus interior	Grass or grass-like	3 ft	Sun–part shade	Medium	Zone 3b
interrupted fern Osmunda claytoniana	Fern	4 ft	Shade-tolerant	High	Zone 3b
Jack in the pulpit Arisaema triphyllum	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 5b
Jerusalem artichoke Helianthus tuberosus	Wildflower (forb)	9.8 ft	Sun–part shade	Low	Zone 3a
jewelweed Impatiens capensis	Wildflower (forb)	4.9 ft	Shade-tolerant	Medium	Zone 10b
lanceleaf loosestrife Lysimachia lanceolata	Wildflower (forb)	2.5 ft	Shade-tolerant	Medium	Zone 5a
leafy pondweed Potamogeton foliosus	Wildflower (forb)	—	Sun	High	Zone 3b
limestone wild petunia Ruellia strepens	Wildflower (forb)	3.6 ft	Shade-tolerant	Low	Zone 6a
little barley Hordeum pusillum	Grass or grass-like	1.2 ft	Sun	Medium	Zone 10b
little bluestem Schizachyrium scoparium	Grass or grass-like	3 ft	Sun	Low	Zone 3b
littleleaf buttercup Ranunculus abortivus	Wildflower (forb)	2.8 ft	Shade-tolerant	Medium	Zone 3a
longleaf pondweed Potamogeton nodosus	Wildflower (forb)	—	Sun	High	Zone 3b
longleaf starwort Stellaria longifolia	Wildflower (forb)	1.5 ft	Shade-tolerant	High	Zone 3b
Malabar sprangletop Leptochloa fusca	Grass or grass-like	3.3 ft	Sun	High	Zone 3a
mapleleaf viburnum Viburnum acerifolium	Shrub	6 ft	Shade-tolerant	Medium	Zone 4b
marsh seedbox Ludwigia palustris	Wildflower (forb)	2 in	Sun	High	Zone 4a
Maryland senna Senna marilandica	Wildflower (forb)	6.6 ft	Sun–part shade	Low	Zone 5b
meadow evening primrose Oenothera pilosella	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 5a
Missouri goldenrod Solidago missouriensis	Wildflower (forb)	3 ft	Sun–part shade	Low	Zone 3b
Missouri ironweed Vernonia missurica	Wildflower (forb)	6 ft	Sun	Medium	Zone 4a
Missouri River willow Salix eriocephala	Tree	52 ft	Shade-tolerant	High	Zone 3b
mockernut hickory Carya tomentosa	Tree	85 ft	Sun–part shade	Medium	Zone 4a
narrowleaf blue-eyed grass Sisyrinchium angustifolium	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 7a
New Jersey tea Ceanothus americanus	Shrub	3 ft	Shade-tolerant	Low	Zone 4b
nimblewill Muhlenbergia schreberi	Grass or grass-like	3.2 ft	Shade-tolerant	Low	Zone 4a
nodding beggartick Bidens cernua	Wildflower (forb)	3.2 ft	Sun–part shade	High	Zone 12a
nodding fescue Festuca subverticillata	Grass or grass-like	3 ft	Sun–part shade	Medium	Zone 3a
nodding lady's tresses Spiranthes cernua	Wildflower (forb)	1.5 ft	Sun	High	Zone 3b
northern maidenhair Adiantum pedatum	Fern	1.3 ft	Shade-tolerant	Medium	Zone 3b
northern red oak Quercus rubra	Tree	81 ft	Sun–part shade	Medium	Zone 3b
northern spicebush Lindera benzoin	Tree	12 ft	Sun–part shade	Medium	Zone 5a
Ohio buckeye Aesculus glabra	Tree	68 ft	Shade-tolerant	Medium	Zone 4a
orangegrass Hypericum gentianoides	Wildflower (forb)	2 ft	Sun–part shade	Low	Zone 12a
oval-leaf sedge Carex cephalophora	Grass or grass-like	2.6 ft	Sun–part shade	Low	Zone 4a
pale purple coneflower Echinacea pallida	Wildflower (forb)	1.2 ft	Sun	Medium	Zone 4a
panicledleaf ticktrefoil Desmodium paniculatum	Wildflower (forb)	3 ft	Sun–part shade	Low	Zone 6a
partridge pea Chamaecrista fasciculata	Wildflower (forb)	2.4 ft	Shade-tolerant	Medium	Zone 7a
pawpaw Asimina triloba	Tree	25 ft	Shade-tolerant	Medium	Zone 4b
peachleaf willow Salix amygdaloides	Tree	60 ft	Sun	High	Zone 4a
pecan Carya illinoinensis	Tree	120 ft	Sun	High	Zone 5a
Pennsylvania bittercress Cardamine pensylvanica	Wildflower (forb)	1.5 ft	Shade-tolerant	Medium	Zone 4a
Pennsylvania smartweed Polygonum pensylvanicum	Wildflower (forb)	3.9 ft	Sun	Medium	Zone 10b
Philadelphia fleabane Erigeron philadelphicus	Wildflower (forb)	2.8 ft	Sun–part shade	Medium	Zone 4b
pignut hickory Carya glabra	Tree	80 ft	Sun–part shade	Medium	Zone 4a
pin oak Quercus palustris	Tree	100 ft	Sun	High	Zone 4a
post oak Quercus stellata	Tree	60 ft	Sun	Medium	Zone 4a
poverty rush Juncus tenuis	Grass or grass-like	1.5 ft	Sun–part shade	Medium	Zone 3b
prairie blazing star Liatris pycnostachya	Wildflower (forb)	3.5 ft	Sun	Medium	Zone 4a
prairie cordgrass Spartina pectinata	Grass or grass-like	8 ft	Sun	High	Zone 3b
prairie crab apple Malus ioensis	Tree	25 ft	Sun	Medium	Zone 4b
prairie fleabane Erigeron strigosus	Wildflower (forb)	3 ft	Sun	Medium	Zone 4b
prairie wedgescale Sphenopholis obtusata	Grass or grass-like	3.2 ft	Sun–part shade	Medium	Zone 3a
prairie willow Salix humilis	Shrub	10 ft	Sun–part shade	High	Zone 3a
pride of Ohio Dodecatheon meadia	Wildflower (forb)	2 ft	Shade-tolerant	Medium	Zone 3b
purple lovegrass Eragrostis spectabilis	Grass or grass-like	11 in	Sun	Low	Zone 3a
purplehead sneezeweed Helenium flexuosum	Wildflower (forb)	3.2 ft	Sun	Low	Zone 4b
purpletop tridens Tridens flavus	Grass or grass-like	2.5 ft	Sun	Low	Zone 5a
pussy willow Salix discolor	Tree	40 ft	Shade-tolerant	High	Zone 4a
quill sedge Carex tenera	Grass or grass-like	2.5 ft	Shade-tolerant	Medium	Zone 4a
rattlesnake fern Botrychium virginianum	Fern	1.4 ft	Shade-tolerant	Medium	Zone 3b
red maple Acer rubrum	Tree	68 ft	Sun–part shade	High	Zone 2b
red mulberry Morus rubra	Tree	70 ft	Shade-tolerant	Medium	Zone 4a
reed canarygrass Phalaris arundinacea	Grass or grass-like	5 ft	Sun	High	Zone 3b
rice cutgrass Leersia oryzoides	Grass or grass-like	4.9 ft	Sun	High	Zone 4a
river birch Betula nigra	Tree	70 ft	Sun	High	Zone 4a
riverbank grape Vitis riparia	Vine	45 ft	Sun–part shade	Medium	Zone 4a
rough avens Geum laciniatum	Wildflower (forb)	3.1 ft	Sun–part shade	Medium	Zone 5a
rough bentgrass Agrostis scabra	Grass or grass-like	2.5 ft	Sun	Medium	Zone 3b
roughfruit amaranth Amaranthus tuberculatus	Wildflower (forb)	6.6 ft	Sun	High	Zone 4a
roughleaf dogwood Cornus drummondii	Tree	20 ft	Sun–part shade	Low	Zone 4b
roundhead lespedeza Lespedeza capitata	Wildflower (forb)	2.6 ft	Sun	Low	Zone 4b
rufous bulrush Scirpus pendulus	Grass or grass-like	4 ft	Sun	Medium	Zone 3b
sago pondweed Stuckenia pectinata	Wildflower (forb)	—	Sun	High	Zone 3b
sandbar willow Salix interior	Tree	30 ft	Sun	—	Zone 1a
sassafras Sassafras albidum	Tree	75 ft	Sun	Low	Zone 4b
sawtooth sunflower Helianthus grosseserratus	Wildflower (forb)	5 ft	Sun	Medium	Zone 3a
shagbark hickory Carya ovata	Tree	75 ft	Sun–part shade	Medium	Zone 3a
shallow sedge Carex lurida	Grass or grass-like	3.2 ft	Sun–part shade	Medium	Zone 4a
sharpwing monkeyflower Mimulus alatus	Wildflower (forb)	2.3 ft	Shade-tolerant	High	Zone 5a
shellbark hickory Carya laciniosa	Tree	100 ft	Shade-tolerant	High	Zone 5a
shingle oak Quercus imbricaria	Tree	45 ft	Sun	Medium	Zone 5b
Short's sedge Carex shortiana	Grass or grass-like	3 ft	Sun–part shade	High	Zone 5b
shrubby St. Johnswort Hypericum prolificum	Shrub	3.2 ft	Sun–part shade	High	Zone 4b
silky dogwood Cornus amomum	Shrub	10 ft	Sun–part shade	High	Zone 3b
silky willow Salix sericea	Tree	12 ft	Sun–part shade	High	Zone 4b
silver maple Acer saccharinum	Tree	90 ft	Sun–part shade	Medium	Zone 2b
slender flatsedge Cyperus bipartitus	Grass or grass-like	5 ft	Sun	Medium	Zone 10b
slender spikerush Eleocharis tenuis	Grass or grass-like	2.9 ft	Sun	Low	Zone 5a
slippery elm Ulmus rubra	Tree	85 ft	Shade-tolerant	High	Zone 3a
smallspike false nettle Boehmeria cylindrica	Wildflower (forb)	3.9 ft	Shade-tolerant	Medium	Zone 4a
smooth blue aster Symphyotrichum laeve	Wildflower (forb)	4 ft	Sun	Medium	Zone 3a
smooth hedgenettle Stachys tenuifolia	Wildflower (forb)	25 ft	Shade-tolerant	High	Zone 4a
smooth horsetail Equisetum laevigatum	Fern	5 ft	Sun	Low	Zone 3b
smooth phlox Phlox glaberrima	Wildflower (forb)	3 ft	Sun–part shade	High	Zone 4b
smooth sumac Rhus glabra	Tree	12 ft	Sun	Low	Zone 4a
softstem bulrush Schoenoplectus tabernaemontani	Grass or grass-like	9 ft	Sun	High	Zone 3b
southern arrowwood Viburnum dentatum	Tree	8 ft	Sun–part shade	—	Zone 5a
southern arrowwood Viburnum recognitum	Tree	9 ft	Shade-tolerant	Medium	Zone 4b
southern waternymph Najas guadalupensis	Wildflower (forb)	1 ft	Sun	High	Zone 3b
spotted joe pye weed Eutrochium maculatum	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 4b
spotted St. Johnswort Hypericum punctatum	Wildflower (forb)	3 ft	Shade-tolerant	Medium	Zone 4a
spring avens Geum vernum	Wildflower (forb)	1.6 ft	Shade-tolerant	Medium	Zone 5b
squarrose sedge Carex squarrosa	Grass or grass-like	3 ft	Shade-tolerant	Medium	Zone 4b
stalkless yellowcress Rorippa sessiliflora	Wildflower (forb)	1.5 ft	Sun–part shade	High	Zone 12b
strawcolored flatsedge Cyperus strigosus	Grass or grass-like	3.2 ft	Sun	Medium	Zone 4a
sugar maple Acer saccharum	Tree	100 ft	Shade-tolerant	Medium	Zone 2b
summer grape Vitis aestivalis	Vine	30 ft	Shade-tolerant	Medium	Zone 5a
swamp cottonwood Populus heterophylla	Tree	100 ft	Sun	High	Zone 5a
swamp milkweed Asclepias incarnata	Wildflower (forb)	4.9 ft	Sun	High	Zone 3b
swamp rose Rosa palustris	Shrub	8.2 ft	Shade-tolerant	Medium	Zone 4a
sweet woodreed Cinna arundinacea	Grass or grass-like	4.9 ft	Shade-tolerant	Low	Zone 4a
tall hairy agrimony Agrimonia gryposepala	Wildflower (forb)	5.9 ft	Sun–part shade	Medium	Zone 3a
taperleaf water horehound Lycopus rubellus	Wildflower (forb)	1.6 ft	Shade-tolerant	High	Zone 5a
tapertip flatsedge Cyperus acuminatus	Grass or grass-like	1.3 ft	Sun–part shade	High	Zone 3b
tapertip rush Juncus acuminatus	Grass or grass-like	3 ft	Sun–part shade	High	Zone 4a
threelobe beggarticks Bidens tripartita	Wildflower (forb)	3.5 ft	Sun–part shade	High	Zone 12a
tiny mousetail Myosurus minimus	Wildflower (forb)	5 in	Sun–part shade	Medium	Zone 12b
trumpet creeper Campsis radicans	Vine	2 ft	Sun	Low	Zone 6a
trumpetweed Eutrochium fistulosum	Wildflower (forb)	6 ft	Sun–part shade	High	Zone 4b
tuliptree Liriodendron tulipifera	Tree	120 ft	Sun	Medium	Zone 5b
upland bentgrass Agrostis perennans	Grass or grass-like	3.5 ft	Sun–part shade	High	Zone 4a
valley redstem Ammannia coccinea	Wildflower (forb)	1.6 ft	Sun	Medium	Zone 3b
variable panicgrass Dichanthelium commutatum	Grass or grass-like	4.9 ft	Sun–part shade	Low	Zone 4b
Virginia bluebells Mertensia virginica	Wildflower (forb)	2.3 ft	Shade-tolerant	High	Zone 4b
Virginia creeper Parthenocissus quinquefolia	Vine	1 ft	Sun–part shade	Low	Zone 4b
Virginia iris Iris virginica	Wildflower (forb)	3.3 ft	Shade-tolerant	High	Zone 8b
Virginia spiderwort Tradescantia virginiana	Wildflower (forb)	1.1 ft	Sun–part shade	Medium	Zone 3b
Virginia threeseed mercury Acalypha virginica	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 10b
Virginia water horehound Lycopus virginicus	Wildflower (forb)	4 ft	Shade-tolerant	High	Zone 4a
Virginia wildrye Elymus virginicus	Grass or grass-like	2.5 ft	Shade-tolerant	Medium	Zone 4b
waterthread pondweed Potamogeton diversifolius	Wildflower (forb)	3.2 ft	Sun	High	Zone 3b
white ash Fraxinus americana	Tree	90 ft	Sun	High	Zone 4a
white avens Geum canadense	Wildflower (forb)	3.9 ft	Shade-tolerant	Medium	Zone 4a
white doll's daisy Boltonia asteroides	Wildflower (forb)	8 ft	Sun–part shade	Medium	Zone 3b
white oak Quercus alba	Tree	100 ft	Sun–part shade	Medium	Zone 3a
white prairie clover Dalea candida	Wildflower (forb)	2 ft	Sun–part shade	Medium	Zone 3b
white sagebrush Artemisia ludoviciana	Wildflower (forb)	3 ft	Sun	Low	Zone 4a
whitegrass Leersia virginica	Grass or grass-like	3.9 ft	Shade-tolerant	Medium	Zone 3a
whiteroot rush Juncus brachycarpus	Grass or grass-like	3 ft	Sun–part shade	Medium	Zone 5a
wild bergamot Monarda fistulosa	Wildflower (forb)	4.9 ft	Sun–part shade	High	Zone 4a
wild blue phlox Phlox divaricata	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 4a
winged sumac Rhus copallinum	Tree	8 ft	Sun	Low	Zone 4b
wirestem muhly Muhlenbergia frondosa	Grass or grass-like	2 ft	Shade-tolerant	Medium	Zone 3b
woodland bluegrass Poa sylvestris	Grass or grass-like	3 ft	Shade-tolerant	High	Zone 4a
woolgrass Scirpus cyperinus	Grass or grass-like	4.9 ft	Sun–part shade	High	Zone 4a
wreath goldenrod Solidago caesia	Wildflower (forb)	3 ft	Sun–part shade	Medium	Zone 4b
yellow flatsedge Cyperus flavescens	Grass or grass-like	2 ft	Sun	Medium	Zone 11b
yellow passionflower Passiflora lutea	Vine	16 ft	Shade-tolerant	Low	Zone 5a

Other native species recorded here 335

PLANTS has no growing records for these, so light, moisture, height and zone filters cannot include them. Many are wild species seldom sold by nurseries.

agueweed Gentianella quinquefolia
Allegheny monkeyflower Mimulus ringens
amberique-bean Strophostyles helvola
American alumroot Heuchera americana
American bladdernut Staphylea trifolia
American burnweed Erechtites hieraciifolius
American cancer-root Conopholis americana
American columbo Frasera caroliniensis
American false pennyroyal Hedeoma pulegioides
American ginseng Panax quinquefolius
American hogpeanut Amphicarpaea bracteata
American ipecac Gillenia stipulata
American lopseed Phryma leptostachya
American senna Senna hebecarpa
American spikenard Aralia racemosa
American stoneseed Lithospermum latifolium
ashy sunflower Helianthus mollis
Aunt Lucy Ellisia nyctelea
autumn coralroot Corallorhiza odontorhiza
balsam groundsel Packera paupercula
bastard toadflax Comandra umbellata
bearded shorthusk Brachyelytrum erectum
beechdrops Epifagus virginiana
big devils beggartick Bidens vulgata
bigbract verbena Verbena bracteata
blackseed plantain Plantago rugelii
blisterwort Ranunculus recurvatus
bloodroot Sanguinaria canadensis
bloody butcher Trillium recurvatum
blue ash Fraxinus quadrangulata
blue skullcap Scutellaria lateriflora
bluntlobe cliff fern Woodsia obtusa
bog yellowcress Rorippa palustris
Bosc's panicgrass Dichanthelium boscii
bristly greenbrier Smilax tamnoides
broad beechfern Phegopteris hexagonoptera
brown widelip orchid Liparis liliifolia
browneyed Susan Rudbeckia triloba
buttonbush dodder Cuscuta cephalanthi
Canada lettuce Lactuca canadensis
Canadian blacksnakeroot Sanicula canadensis
Canadian honewort Cryptotaenia canadensis
Canadian wildginger Asarum canadense
Canadian woodnettle Laportea canadensis
Carolina draba Draba reptans
Carolina geranium Geranium carolinianum
Carolina horsenettle Solanum carolinense
Carolina sedge Carex caroliniana
carpenter's square Scrophularia marilandica
Chapman's bluegrass Poa chapmaniana
Christmas fern Polystichum acrostichoides
churchmouse threeawn Aristida dichotoma
clammy groundcherry Physalis heterophylla
clammy hedgehyssop Gratiola neglecta
clasping Venus' looking-glass Triodanis perfoliata
Clayton's sweetroot Osmorhiza claytonii
clustered blacksnakeroot Sanicula odorata
Columbian watermeal Wolffia columbiana
common boneset Eupatorium perfoliatum
common cinquefoil Potentilla simplex
common milkweed Asclepias syriaca
common moonseed Menispermum canadense
common threeseed mercury Acalypha rhomboidea
common woodrush Luzula multiflora
common yellow oxalis Oxalis stricta
compassplant Silphium laciniatum
creeping lespedeza Lespedeza repens
Culver's root Veronicastrum virginicum
curlytop knotweed Polygonum lapathifolium
cutleaf evening primrose Oenothera laciniata
cutleaf grapefern Botrychium dissectum
cutleaf toothwort Cardamine concatenata
cypress panicgrass Dichanthelium dichotomum
Davis' sedge Carex davisii
Dillenius' ticktrefoil Desmodium glabellum
dogtooth violet Erythronium americanum
dotted hawthorn Crataegus punctata
downy carrionflower Smilax pulverulenta
downy hawthorn Crataegus mollis
downy rattlesnake plantain Goodyera pubescens
Drummond's aster Symphyotrichum drummondii
dutchman's breeches Dicentra cucullaria
dwarf larkspur Delphinium tricorne
early goldenrod Solidago juncea
early meadow-rue Thalictrum dioicum
eastern bottlebrush grass Elymus hystrix
eastern false rue anemone Enemion biternatum
eastern greenviolet Hybanthus concolor
eastern poison ivy Toxicodendron radicans
ebony spleenwort Asplenium platyneuron
elmleaf goldenrod Solidago ulmifolia
Engelmann's spikerush Eleocharis engelmannii
Equisetum ×ferrissii Equisetum ×ferrissii
fall phlox Phlox paniculata
fall witchgrass Digitaria cognata
feathery false lily of the valley Maianthemum racemosum
fernleaf phacelia Phacelia bipinnatifida
field pansy Viola bicolor
field thistle Cirsium discolor
fiveangled dodder Cuscuta pentagona
floating primrose-willow Ludwigia peploides
flowering spurge Euphorbia corollata
fluxweed Trichostema brachiatum
foxtail barley Hordeum jubatum
fragrant bedstraw Galium triflorum
fringed loosestrife Lysimachia ciliata
fuzzy wuzzy sedge Carex hirsutella
giant ironweed Vernonia gigantea
golden zizia Zizia aurea
gravelweed Verbesina helianthoides
great blue lobelia Lobelia siphilitica
great ragweed Ambrosia trifida
great waterleaf Hydrophyllum appendiculatum
Greek valerian Polemonium reptans
green carpetweed Mollugo verticillata
green dragon Arisaema dracontium
green milkweed Asclepias hirtella
hairy hawkweed Hieracium longipilum
hairy hedgenettle Stachys pilosa
hairy pagoda-plant Blephilia hirsuta
hairy pinweed Lechea mucronata
hairy sunflower Helianthus hirsutus
hairy wildrye Elymus villosus
hairy woodland brome Bromus pubescens
harbinger of spring Erigenia bulbosa
heartleaf skullcap Scutellaria ovata
heavy sedge Carex gravida
hedgehog woodrush Luzula echinata
hoary frostweed Helianthemum bicknellii
hoary puccoon Lithospermum canescens
hoary skullcap Scutellaria incana
hoary ticktrefoil Desmodium canescens
hoary verbena Verbena stricta
honeyvine Cynanchum laeve
hortulan plum Prunus hortulana
Illinois ticktrefoil Desmodium illinoense
Indian-tobacco Lobelia inflata
Indianpipe Monotropa uniflora
inflated narrow-leaf sedge Carex grisea
jumpseed Polygonum virginianum
lanceleaf fogfruit Phyla lanceolata
lanceleaf ragweed Ambrosia bidentata
largebract ticktrefoil Desmodium cuspidatum
largeflower bellwort Uvularia grandiflora
lateflowering thoroughwort Eupatorium serotinum
leafy bulrush Scirpus polyphyllus
lemonyellow false goldenaster Heterotheca camporum
licorice bedstraw Galium circaezans
longsepal beardtongue Penstemon calycosus
longstyle sweetroot Osmorhiza longistylis
lowland bladderfern Cystopteris protrusa
lowland rotala Rotala ramosior
Macoun's cudweed Pseudognaphalium macounii
man of the earth Ipomoea pandurata
marginal woodfern Dryopteris marginalis
mat sandbur Cenchrus longispinus
mayapple Podophyllum peltatum
meadow garlic Allium canadense
Miami mist Phacelia purshii
Michigan lily Lilium michiganense
Missouri gooseberry Ribes missouriense
Missouri violet Viola missouriensis
mullein foxglove Dasistoma macrophylla
nakedflower ticktrefoil Desmodium nudiflorum
narrowleaf mountainmint Pycnanthemum tenuifolium
narrowleaf paleseed Leucospora multifida
narrowleaf pinweed Lechea tenuifolia
neckweed Veronica peregrina
New England aster Symphyotrichum novae-angliae
nodding chickweed Cerastium nutans
northern adderstongue Ophioglossum pusillum
northern bugleweed Lycopus uniflorus
northern dewberry Rubus flagellaris
Nuttall's ticktrefoil Desmodium nuttallii
oak mistletoe Phoradendron leucarpum
obedient plant Physostegia virginiana
obovate beakgrain Diarrhena obovata
oneseed bur cucumber Sicyos angulatus
pale dock Rumex altissimus
pale Indian plantain Arnoglossum atriplicifolium
paleleaf woodland sunflower Helianthus strumosus
Parlin's pussytoes Antennaria parlinii
partridgeberry Mitchella repens
Pennsylvania pellitory Parietaria pensylvanica
Pennsylvania sedge Carex pensylvanica
pineland threeseed mercury Acalypha ostryifolia
pinesap Monotropa hypopitys
plain gentian Gentiana alba
pointedleaf ticktrefoil Desmodium glutinosum
poke milkweed Asclepias exaltata
poorjoe Diodia teres
poverty oatgrass Danthonia spicata
prairie groundsel Packera plattensis
prairie ironweed Vernonia fasciculata
prairie rosinweed Silphium terebinthinaceum
prairie tea Croton monanthogynus
prairie threeawn Aristida oligantha
prostrate ticktrefoil Desmodium rotundifolium
pubescent sedge Carex hirtifolia
purple fringeless orchid Platanthera peramoena
purple milkweed Asclepias purpurascens
purple milkwort Polygala sanguinea
purplerocket Iodanthus pinnatifidus
queendevil Hieracium gronovii
rabbit-tobacco Pseudognaphalium obtusifolium
red columbine Aquilegia canadensis
red hickory Carya ovalis
redwhisker clammyweed Polanisia dodecandra
reflexed sedge Carex retroflexa
Richardson's alumroot Heuchera richardsonii
richweed Collinsonia canadensis
robin's plantain Erigeron pulchellus
rock buttercup Ranunculus micranthus
rock polypody Polypodium virginianum
rose mock vervain Glandularia canadensis
rosepink Sabatia angularis
rosy sedge Carex rosea
rough barnyardgrass Echinochloa muricata
roundleaf ragwort Packera obovata
roundseed St. Johnswort Hypericum sphaerocarpum
Sampson's snakeroot Orbexilum pedunculatum
sand bittercress Cardamine parviflora
sand violet Viola affinis
scaldweed Cuscuta gronovii
seedbox Ludwigia alternifolia
Seneca snakeroot Polygala senega
sensitive fern Onoclea sensibilis
sessileleaf ticktrefoil Desmodium sessilifolium
shining bedstraw Galium concinnum
shining clubmoss Huperzia lucidula
Short's rockcress Arabis shortii
shortpod draba Draba brachycarpa
shortspike watermilfoil Myriophyllum sibiricum
showy orchid Galearis spectabilis
showy ticktrefoil Desmodium canadense
shrubby lespedeza Lespedeza frutescens
silky dogwood Cornus obliqua
silver false spleenwort Deparia acrostichoides
sixweeks fescue Vulpia octoflora
sleepy silene Silene antirrhina
slender fimbry Fimbristylis autumnalis
slender lespedeza Lespedeza virginica
slender looseflower sedge Carex gracilescens
slender threeseed mercury Acalypha gracilens
slender wedgescale Sphenopholis intermedia
slender yellow woodsorrel Oxalis dillenii
slenderleaf false foxglove Agalinis tenuifolia
slickseed fuzzybean Strophostyles leiosperma
slimflower muhly Muhlenbergia tenuiflora
slimleaf panicgrass Dichanthelium linearifolium
slimspike threeawn Aristida longespica
small pondweed Potamogeton pusillus
smallflower fumewort Corydalis micrantha
smartweed dodder Cuscuta polygonorum
smooth forked nailwort Paronychia canadensis
smooth oxeye Heliopsis helianthoides
smooth rockcress Arabis laevigata
smooth small-leaf ticktrefoil Desmodium marilandicum
smooth Solomon's seal Polygonatum biflorum
smooth yellow false foxglove Aureolaria flava
soft agrimony Agrimonia pubescens
soft fox sedge Carex conjuncta
Spanish needles Bidens bipinnata
spotted geranium Geranium maculatum
spotted sandmat Chamaesyce maculata
spotted water hemlock Cicuta maculata
spreading chervil Chaerophyllum procumbens
spring coralroot Corallorhiza wisteriana
spring forget-me-not Myosotis verna
stiff sunflower Helianthus pauciflorus
stiff yellow flax Linum medium
stout rush Juncus nodatus
striped cream violet Viola striata
swamp dock Rumex verticillatus
swamp verbena Verbena hastata
sweet coneflower Rudbeckia subtomentosa
sweetscented joe pye weed Eutrochium purpureum
tall blazing star Liatris aspera
tall rattlesnakeroot Prenanthes altissima
tall thimbleweed Anemone virginiana
tall thistle Cirsium altissimum
tall thoroughwort Eupatorium altissimum
tall tickseed Coreopsis tripteris
Tennessee bladderfern Cystopteris tennesseensis
terrestrial water-starwort Callitriche terrestris
thin paspalum Paspalum setaceum
trailing lespedeza Lespedeza procumbens
tufted lovegrass Eragrostis pectinacea
twoflower dwarfdandelion Krigia biflora
twoleaf miterwort Mitella diphylla
upland boneset Eupatorium sessilifolium
Venus' pride Houstonia purpurea
violet lespedeza Lespedeza violacea
violet woodsorrel Oxalis violacea
Virginia mountainmint Pycnanthemum virginianum
Virginia pennywort Obolaria virginica
Virginia pepperweed Lepidium virginicum
Virginia plantain Plantago virginica
Virginia snakeroot Aristolochia serpentaria
Virginia springbeauty Claytonia virginica
Virginia strawberry Fragaria virginiana
Virginia winged rockcress Sibara virginica
walking fern Asplenium rhizophyllum
waxyfruit hawthorn Crataegus pruinosa
waxyleaf meadow-rue Thalictrum revolutum
western waterweed Elodea nuttallii
white baneberry Actaea pachypoda
white blue-eyed grass Sisyrinchium albidum
white fawnlily Erythronium albidum
white goldenrod Solidago bicolor
white snakeroot Ageratina altissima
white vervain Verbena urticifolia
whiteflower leafcup Polymnia canadensis
whitestar Ipomoea lacunosa
whitetinge sedge Carex albicans
whorled milkweed Asclepias verticillata
whorled mountainmint Pycnanthemum verticillatum
widowsfrill Silene stellata
wild comfrey Cynoglossum virginianum
wild hydrangea Hydrangea arborescens
wild yam Dioscorea villosa
willowleaf aster Symphyotrichum praealtum
winged lythrum Lythrum alatum
wingstem Verbesina alternifolia
witchgrass Panicum capillare
woman's tobacco Antennaria plantaginifolia
Wood's bunchflower Veratrum woodii
woodland lettuce Lactuca floridana
woodland sunflower Helianthus divaricatus
yellow giant hyssop Agastache nepetoides
yellow screwstem Bartonia virginica
yellow water buttercup Ranunculus flabellaris
yellowfruit sedge Carex annectens
yellowseed false pimpernel Lindernia dubia
zigzag spiderwort Tradescantia subaspera

Also listed as native and introduced here 5

PLANTS labels these species both native and introduced in this state: some forms are native and others were brought in from elsewhere. Most gardeners should choose plants from the main list.

American red raspberryRubus idaeus
annual ragweedAmbrosia artemisiifolia
bride's feathersAruncus dioicus
climbing false buckwheatPolygonum scandens
Kentucky bluegrassPoa pratensis

Compared with Illinois

The typical county is the median of the 102 Illinois counties with PLANTS county records; the statewide figure counts every species native anywhere in the state. More species is not better or worse: counties differ in size, habitat and how thoroughly they have been surveyed.

Native species counts, Clark County and Illinois
Measure	Clark County	Typical county	Statewide
Native species	607	641	1,909
Garden-ready natives	272	272	652
Tree	76	—	187
Shrub	18	—	96
Wildflower (forb)	357	—	1,015
Grass or grass-like	105	—	444
Vine	31	—	79
Fern	20	—	88

Neighboring counties

Counties that share a ZIP code with Clark County.

Coles County, IL 308 garden-ready
Crawford County, IL 316 garden-ready
Cumberland County, IL 218 garden-ready
Edgar County, IL 228 garden-ready
Jasper County, IL 217 garden-ready

Source & data date

Source: USDA NRCS PLANTS Database: county distribution records, native status and plant characteristics. CC0 (public domain dedication, per the data.gov catalog record).; Kew’s World Checklist of Vascular Plants (WCVP): native or introduced status by state. CC BY 3.0.; USGS US-RIIS (ver. 2.0): species listed as introduced are excluded. CC0.
Citation: USDA, NRCS. 2026. The PLANTS Database (https://plants.usda.gov, 11/04/2026). National Plant Data Team, Greensboro, NC USA.; Govaerts R. (ed.) (2026). WCVP: World Checklist of Vascular Plants. Facilitated by the Royal Botanic Gardens, Kew. Data file dated 2026-06-04, http://sftp.kew.org/pub/data-repositories/WCVP/ (retrieved 2026-11-04). Paper: Govaerts R. et al. (2021) The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8, 215.
Data date: Retrieved from PLANTS on November 4, 2026; WCVP data file dated June 4, 2026.
Zones: USDA Plant Hardiness Zone Map (2023) ZIP table: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 3, 2026. Plant zones on this site are our estimate, not the official map.
Scope: Clark County (county FIPS 17023), Illinois. 607 native species from PLANTS county distribution records; garden-ready = species with a PLANTS characteristics record.
Method: A species is listed when it is recorded as native to the state in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in the county by USDA PLANTS. Species PLANTS labels both native and introduced are listed separately. Full method · All sources

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