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Native plants recorded in your state and county

Native plants · Texas

Native plants of Knox County

43 plant species are recorded as native to Texas in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in Knox County by USDA PLANTS. 24 of them have growing records you can filter by light, moisture, height and estimated cold hardiness.

County summary · USDA PLANTS and Kew WCVP

Knox County, Texas

PLANTS records only 24 garden-ready natives here (under 30). County records are thin in some places; the Texas list is a useful second check.

Native species
43 Typical Texas county: 145 (median of 254 counties)
Garden-ready natives
24 Typical Texas county: 61
Share by type (all 43 native species)
Percent of the 43 native species in each growth type
Tree 2% (1)
Shrub 7% (3)
Wildflower (forb) 44% (19)
Grass or grass-like 47% (20)

Grasses and grass-like plants make up the largest share of the native list (47%), followed by wildflowers (44%).

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 8a (2023 map).

The native plant list

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

Garden-ready natives 24

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

Garden-ready native plants of Knox County, Texas
PlantType HeightLight Water useHardy to
alkali sacaton Sporobolus airoides Grass or grass-like 3 ft Sun Low Zone 3b
Arizona cottontop Digitaria californica Grass or grass-like 4 ft Sun Low Zone 6a
big bluestem Andropogon gerardii Grass or grass-like 6 ft Sun Low Zone 2b
blue grama Bouteloua gracilis Grass or grass-like 1 ft Sun Medium Zone 3a
broom snakeweed Gutierrezia sarothrae Shrub 1.5 ft Sun Medium Zone 3b
buffalograss Bouteloua dactyloides Grass or grass-like 6 in Sun Medium Zone 3b
Canadian horseweed Conyza canadensis Wildflower (forb) 5 ft Sun Medium Zone 12b
dotted blazing star Liatris punctata Wildflower (forb) 2 ft Sun Medium Zone 3a
eastern woodland sedge Carex blanda Grass or grass-like 2 ft Shade-tolerant High Zone 4b
featherplume Dalea formosa Shrub 3 ft Sun Low Zone 6a
fragrant flatsedge Cyperus odoratus Grass or grass-like 2 ft Sun Medium Zone 11b
golden tickseed Coreopsis tinctoria Wildflower (forb) 3 ft Sun–part shade High Zone 12b
James' galleta Pleuraphis jamesii Grass or grass-like 2 ft Sun Low Zone 5a
little bluestem Schizachyrium scoparium Grass or grass-like 3 ft Sun Low Zone 3b
Nuttall's povertyweed Monolepis nuttalliana Wildflower (forb) 10 in Sun Medium Zone 12a
purple threeawn Aristida purpurea Grass or grass-like 1.4 ft Sun Low Zone 4a
sand dropseed Sporobolus cryptandrus Grass or grass-like 3 ft Sun Low Zone 3b
scratchgrass Muhlenbergia asperifolia Grass or grass-like 2 ft Shade-tolerant High Zone 5b
sideoats grama Bouteloua curtipendula Grass or grass-like 3 ft Sun Medium Zone 3a
skunkbush sumac Rhus trilobata Shrub 4 ft Sun–part shade Low Zone 2a
tenpetal blazingstar Mentzelia decapetala Wildflower (forb) 3.5 ft Sun Medium Zone 3b
tobosagrass Pleuraphis mutica Grass or grass-like 2.3 ft Sun Low Zone 7b
vine mesquite Panicum obtusum Grass or grass-like 2 ft Sun–part shade High Zone 5a
white prairie clover Dalea candida Wildflower (forb) 2 ft Sun–part shade Medium Zone 3b

Other native species recorded here 19

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.

  • annual buckwheat Eriogonum annuum
  • Dakota mock vervain Glandularia bipinnatifida
  • downy ragged goldenrod Solidago petiolaris
  • false boneset Brickellia eupatorioides
  • feather fingergrass Chloris virgata
  • gum bully Sideroxylon lanuginosum
  • Hopi tea greenthread Thelesperma megapotamicum
  • mucronate sprangletop Leptochloa panicea
  • narrowleaf four o'clock Mirabilis linearis
  • narrowleaf purple coneflower Echinacea angustifolia
  • pitseed goosefoot Chenopodium berlandieri
  • prairie broomweed Amphiachyris dracunculoides
  • redwhisker clammyweed Polanisia dodecandra
  • rough barnyardgrass Echinochloa muricata
  • silverleaf nightshade Solanum elaeagnifolium
  • tufted lovegrass Eragrostis pectinacea
  • warty caltrop Kallstroemia parviflora
  • witchgrass Panicum capillare
  • woolly tidestromia Tidestromia lanuginosa

Compared with Texas

The typical county is the median of the 254 Texas 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, Knox County and Texas
MeasureKnox CountyTypical countyStatewide
Native species 43 145 1,683
Garden-ready natives 24 61 656
Tree 1 — 164
Shrub 3 — 90
Wildflower (forb) 19 — 877
Grass or grass-like 20 — 431
Vine 0 — 83
Fern 0 — 38

Neighboring counties

Counties that share a ZIP code with Knox 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
Knox County (county FIPS 48275), Texas. 43 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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