Authors: Melissa Islam
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Families: 67
Genera: 267
Species: 412 (species rank)
Total Taxa: 414 (including subsp. and var.)

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Alisma gramineum
narrowleaf water plantain
[ALISMATACEAE]
Alisma triviale
Northern Water-Plantain
Sagittaria cuneata
Arum-Leaf Arrowhead
Amaranthus blitoides
Mat Amaranth
[AMARANTHACEAE]
Amaranthus palmeri
Careless Weed
Amaranthus powellii
Green Amaranth
Atriplex canescens
fourwing saltbush
Chenopodiastrum simplex
Giant-Seed Mock Goosefoot
Chenopodium album
Lamb's-Quarters
Chenopodium leptophyllum
narrowleaf goosefoot
Dysphania botrys
Jerusalem-Oak
Kochia scoparia
Mexican-Fireweed
Salsola tragus
Prickly Russian-Thistle
Allium textile
textile onion
[AMARYLLIDACEAE]
Rhus trilobata var. trilobata
skunkbush sumac
[ANACARDIACEAE]
Toxicodendron rydbergii
Western Poison Ivy
Berula erecta
cutleaf waterparsnip
[APIACEAE]
Cicuta douglasii
water-hemlock
Conium maculatum
Poison-Hemlock
Daucus carota
Queen Anne's-Lace
Lomatium dissectum
fernleaf biscuitroot
Lomatium orientale
Northern Idaho biscuitroot
Apocynum cannabinum
Indian-Hemp
[APOCYNACEAE]
Asclepias incarnata
Swamp Milkweed
Asclepias pumila
plains milkweed
Asclepias speciosa
showy milkweed
Lemna minor
Common Duckweed
[ARACEAE]
Asparagus officinalis
Asparagus
[ASPARAGACEAE]
Leucocrinum montanum
common starlily
Maianthemum stellatum
Starry False Lily of the Valley
Yucca glauca
Great Plains yucca
Achillea millefolium
western yarrow
[ASTERACEAE]
Ambrosia artemisiifolia
Annual Ragweed
Ambrosia psilostachya
Perennial Ragweed
Ambrosia tomentosa
burragweed
Ambrosia trifida
Great Ragweed
Antennaria rosea
rosy pussytoes
Arctium minus
Lesser Burrdock
Artemisia biennis
Biennial Wormwood
Artemisia campestris
Pacific Wormwood
Artemisia frigida
prairie sagewort
Artemisia ludoviciana
White Sagebrush
Bidens frondosa
Devil's-Pitchfork
Carduus nutans
Nodding Plumeless-Thistle
Centaurea diffusa
White Knapweed
Cirsium arvense
Canadian Thistle
Conyza canadensis
Canadian Horseweed
Crepis occidentalis
largeflower hawksbeard
Dieteria bigelovii
Bigelow's tansyaster
Dieteria canescens
hoary tansyaster
Dyssodia papposa
Fetid-Marigold
Ericameria nauseosa
rubber rabbitbrush
Erigeron divergens
spreading fleabane
Erigeron speciosus
aspen fleabane
Gnaphalium uliginosum
marsh cudweed
Grindelia squarrosa
curlycup gumweed
Gutierrezia sarothrae
broom snakeweed
Helianthus annuus
common sunflower
Helianthus nuttallii
Nuttall's sunflower
Helianthus petiolaris
prairie sunflower
Heliomeris multiflora
showy goldeneye
Heterotheca villosa
hairy false goldenaster
Iva axillaris
povertyweed
Lactuca serriola
prickly lettuce
Liatris punctata
dotted blazing star
Lygodesmia juncea
rush skeletonplant
Matricaria discoidea
disc mayweed
Onopordum acanthium
Scotch cottonthistle
Picradeniopsis oppositifolia
oppositeleaf bahia
Ratibida columnifera
upright prairie coneflower
Rudbeckia hirta
black-eyed Susan
Rudbeckia laciniata var. ampla
cutleaf coneflower
Scorzonera laciniata
False salsify
Senecio integerrimus
western groundsel
Senecio spartioides
broom groundsel
Solidago gigantea
giant goldenrod
Solidago missouriensis
Missouri goldenrod
Solidago rigida
stiff-leaved goldenrod
Sonchus asper
spiny sowthistle
Symphyotrichum ericoides
white heath aster
Symphyotrichum falcatum
white prairie aster
Symphyotrichum laeve
smooth blue aster
Symphyotrichum lanceolatum
white panicle aster
Taraxacum officinale
common dandelion
Thelesperma megapotamicum
Hopi tea greenthread