Plants of Illinois
The plants most often spotted in Illinois, ranked by recent research-grade observations.
278,723
recent observations
50
species listed
50
plants
Naturalists have logged 278,723 research-grade observations across the 50 most-recorded species in Illinois. The most frequently seen is the common milkweed, with 12,393 recorded sightings.
Most-observed plants in Illinois
common milkweed
Asclepias syriaca
12,393 observations
prairie trillium
Trillium recurvatum
11,010 observations
mayapple
Podophyllum peltatum
10,981 observations
Virginia Springbeauty
Claytonia virginica
10,349 observations
Virginia bluebells
Mertensia virginica
9,074 observations
American pokeweed
Phytolacca americana
8,225 observations
wild bergamot
Monarda fistulosa
7,606 observations
bloodroot
Sanguinaria canadensis
7,433 observations
blue phlox
Phlox divaricata
7,365 observations
Amur honeysuckle
Lonicera maackii
7,302 observations
ground-ivy
Glechoma hederacea
6,928 observations · iNaturalist
garlic mustard
Alliaria petiolata
6,727 observations
wild geranium
Geranium maculatum
6,622 observations
tall bellflower
Campanulastrum americanum
6,365 observations · iNaturalist
wild carrot
Daucus carota
6,046 observations
cut-leaved toothwort
Cardamine concatenata
5,971 observations
chicory
Cichorium intybus
5,515 observations
butterfly milkweed
Asclepias tuberosa
5,279 observations
grey-headed coneflower
Ratibida pinnata
5,153 observations
Dutchman's breeches
Dicentra cucullaria
5,117 observations
Red Clover
Trifolium pratense
4,954 observations
white snakeroot
Ageratina altissima
4,942 observations
rattlesnake master
Eryngium yuccifolium
4,824 observations
compass plant
Silphium laciniatum
4,811 observations
box elder
Acer negundo
4,789 observations
Jack-in-the-Pulpit
Arisaema triphyllum
4,766 observations
Butterweed
Packera glabella
4,741 observations · iNaturalist
white fawnlily
Erythronium albidum
4,709 observations
white clover
Trifolium repens
4,635 observations
American black elderberry
Sambucus canadensis
4,561 observations
eastern redbud
Cercis canadensis
4,444 observations
cup plant
Silphium perfoliatum
4,427 observations
common jewelweed
Impatiens capensis
4,416 observations
eastern poison ivy
Toxicodendron radicans
4,411 observations
eastern shooting star
Primula meadia
4,288 observations
great mullein
Verbascum thapsus
4,277 observations
great blue lobelia
Lobelia siphilitica
4,192 observations
common pawpaw
Asimina triloba
4,083 observations
Carolina horsenettle
Solanum carolinense
4,028 observations
American jumpseed
Persicaria virginiana
3,868 observations · iNaturalist
swamp milkweed
Asclepias incarnata
3,859 observations
red columbine
Aquilegia canadensis
3,804 observations
bittersweet nightshade
Solanum dulcamara
3,788 observations
multiflora rose
Rosa multiflora
3,756 observations
purple crownvetch
Securigera varia
3,734 observations · iNaturalist
prairie dock
Silphium terebinthinaceum
3,679 observations
Virginia waterleaf
Hydrophyllum virginianum
3,650 observations
mock strawberry
Potentilla indica
3,631 observations · iNaturalist
dame's rocket
Hesperis matronalis
3,620 observations · iNaturalist
common ragweed
Ambrosia artemisiifolia
3,575 observations
Plants in nearby places
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