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Native plants · Idaho

Native plants of Power County

154 plant species are recorded as native to Idaho in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Power County by USDA PLANTS. 116 of them have growing records you can filter by light, moisture, height and estimated cold hardiness. 4 more species are listed as both native and introduced and kept in a separate section.

County summary · USDA PLANTS and Kew WCVP

Power County, Idaho

Native species
154 Typical Idaho county: 302 (median of 44 counties)
Garden-ready natives
116 Typical Idaho county: 211
Share by type (all 154 native species)
Percent of the 154 native species in each growth type
Tree 10% (15)
Shrub 12% (18)
Wildflower (forb) 53% (81)
Grass or grass-like 25% (39)
Vine <1% (1)

Wildflowers make up the largest share of the native list (53%), followed by grasses and grass-like plants (25%).

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 zone 6a (2023 map).

The native plant list

Cold hardiness is estimated from each plant’s PLANTS minimum temperature. How we estimate it.

Garden-ready natives 116

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

Garden-ready native plants of Power County, Idaho
PlantType HeightLight Water useHardy to
alkali cordgrass Spartina gracilis Grass or grass-like 3 ft Sun Medium Zone 3b
alkali sacaton Sporobolus airoides Grass or grass-like 3 ft Sun Low Zone 3b
alpine leafybract aster Symphyotrichum foliaceum Wildflower (forb) 2 ft Sun Medium Zone 3b
American licorice Glycyrrhiza lepidota Wildflower (forb) 4 ft Sun–part shade High Zone 3b
American speedwell Veronica americana Wildflower (forb) 10 in Shade-tolerant High Zone 3b
Anderson's larkspur Delphinium andersonii Wildflower (forb) 2 ft Shade-tolerant Low Zone 5b
ballhead waterleaf Hydrophyllum capitatum Wildflower (forb) 1 ft Shade-tolerant High Zone 4b
beardless wildrye Leymus triticoides Grass or grass-like 3 ft Sun High Zone 3a
big sagebrush Artemisia tridentata Tree 4 ft Sun Medium Zone 3a
bigtooth maple Acer grandidentatum Tree 38 ft Sun–part shade Medium Zone 4a
black hawthorn Crataegus douglasii Tree 15 ft Sun–part shade High Zone 2b
blue wildrye Elymus glaucus Grass or grass-like 3.3 ft Shade-tolerant Low Zone 3b
bluebunch wheatgrass Pseudoroegneria spicata Grass or grass-like 3 ft Sun Low Zone 3b
boxelder Acer negundo Tree 60 ft Shade-tolerant Medium Zone 2b
broom snakeweed Gutierrezia sarothrae Shrub 1.5 ft Sun Medium Zone 3b
bushy bird's beak Cordylanthus ramosus Wildflower (forb) 1 ft Sun–part shade Medium Zone 12b
Canadian milkvetch Astragalus canadensis Wildflower (forb) 6 in Sun Medium Zone 3b
common reed Phragmites australis Shrub 13 ft Sun Medium Zone 3b
common sneezeweed Helenium autumnale Wildflower (forb) 4.9 ft Sun Medium Zone 3a
cosmopolitan bulrush Bolboschoenus maritimus Grass or grass-like 3.2 ft Sun Medium Zone 5a
cous biscuitroot Lomatium cous Wildflower (forb) 10 in Sun Low Zone 4b
creeping barberry Mahonia repens Shrub 2 ft Shade-tolerant Medium Zone 5a
curl-leaf mountain mahogany Cercocarpus ledifolius Tree 20 ft Sun–part shade Low Zone 2b
Drummond's rush Juncus drummondii Grass or grass-like 1.5 ft Sun–part shade Medium Zone 3b
false indigo bush Amorpha fruticosa Shrub 15 ft Sun Low Zone 3b
fernleaf biscuitroot Lomatium dissectum Wildflower (forb) 15 ft Sun–part shade Low Zone 8a
flat-top pussytoes Antennaria corymbosa Wildflower (forb) 1 ft Shade-tolerant High Zone 5b
freckled milkvetch Astragalus lentiginosus Shrub 1.4 ft Sun Low Zone 4b
golden currant Ribes aureum Shrub 10 ft Sun–part shade Low Zone 3b
granite prickly phlox Linanthus pungens Wildflower (forb) 2 ft Shade-tolerant Low Zone 4a
gray alder Alnus incana Tree 25 ft Sun–part shade High Zone 4a
greasewood Sarcobatus vermiculatus Shrub 10 ft Sun Low Zone 3b
greenleaf fescue Festuca viridula Grass or grass-like 2.5 ft Sun–part shade Medium Zone 4a
hairy arnica Arnica mollis Wildflower (forb) 2 ft Sun–part shade High Zone 4a
hardstem bulrush Schoenoplectus acutus Grass or grass-like 9.8 ft Sun High Zone 3b
Indian ricegrass Achnatherum hymenoides Grass or grass-like 2 ft Sun Low Zone 3a
knotted rush Juncus nodosus Grass or grass-like 2 ft Sun Medium Zone 4b
lambstongue ragwort Senecio integerrimus Wildflower (forb) 1.1 ft Sun–part shade Medium Zone 3b
little sagebrush Artemisia arbuscula Shrub 2 ft Sun Low Zone 3a
littleleaf pussytoes Antennaria microphylla Wildflower (forb) 1 ft Sun Low Zone 3b
lodgepole pine Pinus contorta Tree 99 ft Sun Medium Zone 1a
longleaf phlox Phlox longifolia Wildflower (forb) 1.2 ft Sun–part shade Low Zone 6a
longstyle rush Juncus longistylis Grass or grass-like 1.8 ft Sun–part shade High Zone 3b
low pussytoes Antennaria dimorpha Wildflower (forb) 4 in Sun–part shade Low Zone 3b
maiden blue eyed Mary Collinsia parviflora Wildflower (forb) 1 ft Shade-tolerant Medium Zone 4a
Munro's globemallow Sphaeralcea munroana Wildflower (forb) 2.5 ft Sun Low Zone 4b
narrowleaf cottonwood Populus angustifolia Tree 60 ft Sun High Zone 4b
narrowleaf willow Salix exigua Tree 10 ft Sun–part shade High Zone 3b
Nebraska sedge Carex nebrascensis Grass or grass-like 3 ft Sun High Zone 3b
needle and thread Hesperostipa comata Grass or grass-like 3 ft Sun Low Zone 3b
nineleaf biscuitroot Lomatium triternatum Wildflower (forb) 2.2 ft Sun–part shade Medium Zone 4a
Nootka rose Rosa nutkana Shrub 10 ft Shade-tolerant High Zone 8a
northwestern Indian paintbrush Castilleja angustifolia Wildflower (forb) 2.5 ft Shade-tolerant Medium Zone 4a
Nuttall's sunflower Helianthus nuttallii Wildflower (forb) 10 ft Sun Medium Zone 3b
oneflower helianthella Helianthella uniflora Wildflower (forb) 2 ft Sun–part shade Low Zone 5a
oniongrass Melica bulbosa Grass or grass-like 1.8 ft Sun–part shade Low Zone 3a
orange agoseris Agoseris aurantiaca Wildflower (forb) 1 ft Sun Medium Zone 4a
pale agoseris Agoseris glauca Shrub 1 ft Sun Medium Zone 4a
Parry's rush Juncus parryi Grass or grass-like 1 ft Sun–part shade Low Zone 4a
pinegrass Calamagrostis rubescens Grass or grass-like 3 ft Shade-tolerant Medium Zone 4b
quaking aspen Populus tremuloides Tree 65 ft Sun High Zone 1a
Raynolds' sedge Carex raynoldsii Grass or grass-like 2 ft Shade-tolerant Medium Zone 4a
Rocky Mountain beeplant Cleome serrulata Wildflower (forb) 3 ft Sun–part shade Medium Zone 12b
Rocky Mountain iris Iris missouriensis Wildflower (forb) 1 ft Sun–part shade High Zone 4b
Rocky Mountain juniper Juniperus scopulorum Tree 50 ft Sun Low Zone 3b
rough bentgrass Agrostis scabra Grass or grass-like 2.5 ft Sun Medium Zone 3b
rubber rabbitbrush Ericameria nauseosa Shrub 4 ft Sun Medium Zone 3b
sago pondweed Stuckenia pectinata Wildflower (forb) — Sun High Zone 3b
salt spring checkerbloom Sidalcea neomexicana Wildflower (forb) 2.5 ft Shade-tolerant High Zone 5a
saltgrass Distichlis spicata Grass or grass-like 1.1 ft Sun Medium Zone 3b
sand dropseed Sporobolus cryptandrus Grass or grass-like 3 ft Sun Low Zone 3b
Sandberg bluegrass Poa secunda Grass or grass-like 1.4 ft Sun–part shade Low Zone 3b
sanddune wallflower Erysimum capitatum Wildflower (forb) 2.5 ft Sun Medium Zone 4b
scarlet gilia Ipomopsis aggregata Wildflower (forb) 3 ft Sun Low Zone 5b
Scouler's willow Salix scouleriana Tree 50 ft Sun–part shade High Zone 6a
scratchgrass Muhlenbergia asperifolia Grass or grass-like 2 ft Shade-tolerant High Zone 5b
sea milkwort Glaux maritima Wildflower (forb) 11 in Sun High Zone 4a
showy milkweed Asclepias speciosa Wildflower (forb) 6 ft Sun Medium Zone 4a
shrubby cinquefoil Dasiphora fruticosa Shrub 2.5 ft Sun–part shade Low Zone 4b
silverleaf phacelia Phacelia hastata Wildflower (forb) 2 ft Sun–part shade Medium Zone 3b
silverweed cinquefoil Argentina anserina Wildflower (forb) 6 in Shade-tolerant High Zone 5a
skunkbush sumac Rhus trilobata Shrub 4 ft Sun–part shade Low Zone 2a
slender hairgrass Deschampsia elongata Grass or grass-like 3 ft Sun Low Zone 3b
slender wheatgrass Elymus trachycaulus Grass or grass-like 3 ft Sun Medium Zone 3b
slenderbeak sedge Carex athrostachya Grass or grass-like 2 ft Sun–part shade High Zone 4a
slimstem reedgrass Calamagrostis stricta Grass or grass-like 3 ft Sun–part shade High Zone 3a
small enchanter's nightshade Circaea alpina Wildflower (forb) 11 in Shade-tolerant Medium Zone 3b
sticky cinquefoil Potentilla glandulosa Wildflower (forb) 1.5 ft Sun–part shade Low Zone 4a
sticky currant Ribes viscosissimum Shrub 3.5 ft Sun — Zone 3b
streambank wild hollyhock Iliamna rivularis Wildflower (forb) 6 ft Sun–part shade Medium Zone 4a
sulphur-flower buckwheat Eriogonum umbellatum Shrub 1 ft Sun Low Zone 8a
tapertip onion Allium acuminatum Wildflower (forb) 1 ft Sun Low Zone 4b
teal lovegrass Eragrostis hypnoides Grass or grass-like 4 in Sun High Zone 3b
textile onion Allium textile Wildflower (forb) 1 ft Sun–part shade Medium Zone 3b
thickspike wheatgrass Elymus lanceolatus Grass or grass-like 2.3 ft Sun Low Zone 3b
thickstem aster Eurybia integrifolia Wildflower (forb) 3 ft Sun Low Zone 5a
threadleaf fleabane Erigeron filifolius Wildflower (forb) 1 ft Sun Low Zone 6a
Torrey's rush Juncus torreyi Grass or grass-like 3.1 ft Sun Medium Zone 3b
tufted evening primrose Oenothera caespitosa Wildflower (forb) 6 in Sun Low Zone 6a
tufted hairgrass Deschampsia cespitosa Grass or grass-like 3.4 ft Sun Low Zone 3b
Utah juniper Juniperus osteosperma Tree 26 ft Sun Low Zone 4b
water birch Betula occidentalis Tree 25 ft Sun–part shade High Zone 1a
water knotweed Polygonum amphibium Wildflower (forb) 1 in Sun High Zone 5a
wavyleaf Indian paintbrush Castilleja applegatei Wildflower (forb) 1.5 ft Sun Low Zone 4b
wax currant Ribes cereum Shrub 3 ft Sun Low Zone 5a
western needlegrass Achnatherum occidentale Grass or grass-like 2 ft Sun–part shade Low Zone 4b
western stoneseed Lithospermum ruderale Wildflower (forb) 1.5 ft Sun Low Zone 4b
western valerian Valeriana occidentalis Wildflower (forb) 3 ft Sun High Zone 4b
western wheatgrass Pascopyrum smithii Grass or grass-like 2 ft Sun Medium Zone 3a
white panicle aster Symphyotrichum lanceolatum Wildflower (forb) 6 ft Sun–part shade High Zone 3b
woolly groundsel Packera cana Wildflower (forb) 1.5 ft Sun Low Zone 3a
woolly plantain Plantago patagonica Wildflower (forb) 6 in Sun Low Zone 12b
woollypod milkvetch Astragalus purshii Wildflower (forb) 7 in Sun Low Zone 4a
yellow fritillary Fritillaria pudica Wildflower (forb) 1 ft Sun–part shade Medium Zone 12a
yellow rabbitbrush Chrysothamnus viscidiflorus Shrub 3 ft Sun Low Zone 5a
yellow wildrye Leymus flavescens Grass or grass-like 3 ft Sun Medium Zone 5b

Other native species recorded here 38

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.

  • American sloughgrass Beckmannia syzigachne
  • bastard toadflax Comandra umbellata
  • Bebb willow Salix bebbiana
  • carelessweed Cyclachaena xanthiifolia
  • curlycup gumweed Grindelia squarrosa
  • Douglas' knotweed Polygonum douglasii
  • entireleaved thelypody Thelypodium integrifolium
  • feathery false lily of the valley Maianthemum racemosum
  • flatspine stickseed Lappula occidentalis
  • foxtail barley Hordeum jubatum
  • giant red Indian paintbrush Castilleja miniata
  • hedge false bindweed Calystegia sepium
  • hoary tansyaster Machaeranthera canescens
  • horned pondweed Zannichellia palustris
  • lanceleaf figwort Scrophularia lanceolata
  • lemon scurfpea Psoralidium lanceolatum
  • manyflower stickseed Hackelia floribunda
  • Menzies' campion Silene menziesii
  • Menzies' fiddleneck Amsinckia menziesii
  • nodding buckwheat Eriogonum cernuum
  • northern bog violet Viola nephrophylla
  • pale spikerush Eleocharis macrostachya
  • povertyweed Iva axillaris
  • redwool plantain Plantago eriopoda
  • roughfruit fairybells Prosartes trachycarpa
  • rusty lupine Lupinus pusillus
  • shaggy fleabane Erigeron pumilus
  • sidebells wintergreen Orthilia secunda
  • spearleaf stonecrop Sedum lanceolatum
  • spiny milkvetch Astragalus kentrophyta
  • spotted fritillary Fritillaria atropurpurea
  • spreading dogbane Apocynum androsaemifolium
  • sweetcicely Osmorhiza berteroi
  • Virginia pepperweed Lepidium virginicum
  • whitestem blazingstar Mentzelia albicaulis
  • witchgrass Panicum capillare
  • woodland strawberry Fragaria vesca
  • woolly sedge Carex pellita
Also listed as native and introduced here 4

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.

Compared with Idaho

The typical county is the median of the 44 Idaho 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, Power County and Idaho
MeasurePower CountyTypical countyStatewide
Native species 154 302 975
Garden-ready natives 116 211 591
Tree 15 — 65
Shrub 18 — 97
Wildflower (forb) 81 — 552
Grass or grass-like 39 — 206
Vine 1 — 14
Fern 0 — 41

Neighboring counties

Counties that share a ZIP code with Power County.

Look up another ZIP

Matches your ZIP to the county it mostly lies in, then lists the plants recorded as native to your state (Kew’s World Checklist and USDA PLANTS) and recorded in that county by USDA PLANTS.

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
Power County (county FIPS 16077), Idaho. 154 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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