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common milkweed
Asclepias syriaca
11,789 observations
prairie trillium
Trillium recurvatum
9,780 observations
mayapple
Podophyllum peltatum
8,543 observations
Virginia Springbeauty
Claytonia virginica
8,001 observations
Virginia bluebells
Mertensia virginica
7,677 observations
wild bergamot
Monarda fistulosa
7,114 observations
American pokeweed
Phytolacca americana
6,820 observations
white snakeroot
Ageratina altissima
6,323 observations
bloodroot
Sanguinaria canadensis
6,069 observations
ground-ivy
Glechoma hederacea
5,889 observations
wild geranium
Geranium maculatum
5,838 observations
blue phlox
Phlox divaricata
5,714 observations
garlic mustard
Alliaria petiolata
5,705 observations
wild carrot
Daucus carota
5,198 observations
Amur honeysuckle
Lonicera maackii
5,156 observations
tall bellflower
Campanulastrum americanum
5,116 observations
cut-leaved toothwort
Cardamine concatenata
4,906 observations
chicory
Cichorium intybus
4,868 observations
grey-headed coneflower
Ratibida pinnata
4,730 observations
compass plant
Silphium laciniatum
4,633 observations
butterfly milkweed
Asclepias tuberosa
4,547 observations
rattlesnake master
Eryngium yuccifolium
4,370 observations
white fawnlily
Erythronium albidum
4,318 observations
Red Clover
Trifolium pratense
4,259 observations
Jack-in-the-Pulpit
Arisaema triphyllum
4,201 observations
cup plant
Silphium perfoliatum
4,154 observations
Dutchman's breeches
Dicentra cucullaria
4,134 observations
eastern shooting star
Primula meadia
3,893 observations
bittersweet nightshade
Solanum dulcamara
3,855 observations
American black elderberry
Sambucus canadensis
3,827 observations
great blue lobelia
Lobelia siphilitica
3,700 observations
common jewelweed
Impatiens capensis
3,667 observations
box elder
Acer negundo
3,648 observations
New England aster
Symphyotrichum novae-angliae
3,555 observations
eastern poison ivy
Toxicodendron radicans
3,532 observations
dame's rocket
Hesperis matronalis
3,502 observations
Virginia waterleaf
Hydrophyllum virginianum
3,471 observations
swamp milkweed
Asclepias incarnata
3,468 observations
prairie dock
Silphium terebinthinaceum
3,457 observations
Butterweed
Packera glabella
3,449 observations
great mullein
Verbascum thapsus
3,353 observations
American jumpseed
Persicaria virginiana
3,316 observations
black-eyed Susan
Rudbeckia hirta
3,278 observations
white clover
Trifolium repens
3,270 observations
purple crownvetch
Securigera varia
3,260 observations
common ragweed
Ambrosia artemisiifolia
3,200 observations
cutleaf teasel
Dipsacus laciniatus
3,157 observations
Carolina horsenettle
Solanum carolinense
3,068 observations
Ohio spiderwort
Tradescantia ohiensis
3,047 observations
red columbine
Aquilegia canadensis
3,016 observations
Frequently Asked Questions
- The 10 most common plants in Illinois are:
- common milkweed (Asclepias syriaca)
- prairie trillium (Trillium recurvatum)
- mayapple (Podophyllum peltatum)
- Virginia Springbeauty (Claytonia virginica)
- Virginia bluebells (Mertensia virginica)
- wild bergamot (Monarda fistulosa)
- American pokeweed (Phytolacca americana)
- white snakeroot (Ageratina altissima)
- bloodroot (Sanguinaria canadensis)
- ground-ivy (Glechoma hederacea)
- The most observed plant in Illinois is common milkweed (Asclepias syriaca), with 11,789 recorded observations.