Plants of Illinois
The plants most often spotted in Illinois, ranked by recent research-grade observations.
283,885
recent observations
50
species listed
50
plants
Naturalists have logged 283,885 research-grade observations across the 50 most-recorded species in Illinois. The most frequently seen is the common milkweed, with 13,236 recorded sightings.
Most-observed plants in Illinois
common milkweed
Asclepias syriaca
13,236 observations
prairie trillium
Trillium recurvatum
11,011 observations
mayapple
Podophyllum peltatum
10,991 observations
Virginia Springbeauty
Claytonia virginica
10,354 observations
Virginia bluebells
Mertensia virginica
9,075 observations
American pokeweed
Phytolacca americana
8,496 observations
wild bergamot
Monarda fistulosa
7,645 observations
blue phlox
Phlox divaricata
7,493 observations
bloodroot
Sanguinaria canadensis
7,443 observations
Amur honeysuckle
Lonicera maackii
7,437 observations
ground-ivy
Glechoma hederacea
6,963 observations · iNaturalist
garlic mustard
Alliaria petiolata
6,733 observations
wild geranium
Geranium maculatum
6,647 observations
tall bellflower
Campanulastrum americanum
6,462 observations · iNaturalist
wild carrot
Daucus carota
6,129 observations
white snakeroot
Ageratina altissima
6,010 observations
cut-leaved toothwort
Cardamine concatenata
5,972 observations
chicory
Cichorium intybus
5,620 observations
butterfly milkweed
Asclepias tuberosa
5,343 observations
grey-headed coneflower
Ratibida pinnata
5,253 observations
Dutchman's breeches
Dicentra cucullaria
5,134 observations
Red Clover
Trifolium pratense
5,045 observations
compass plant
Silphium laciniatum
4,896 observations
rattlesnake master
Eryngium yuccifolium
4,884 observations
box elder
Acer negundo
4,813 observations
Jack-in-the-Pulpit
Arisaema triphyllum
4,778 observations
Butterweed
Packera glabella
4,740 observations · iNaturalist
white fawnlily
Erythronium albidum
4,711 observations
white clover
Trifolium repens
4,687 observations
American black elderberry
Sambucus canadensis
4,631 observations
common jewelweed
Impatiens capensis
4,626 observations
cup plant
Silphium perfoliatum
4,530 observations
great blue lobelia
Lobelia siphilitica
4,486 observations
eastern redbud
Cercis canadensis
4,483 observations
eastern poison ivy
Toxicodendron radicans
4,457 observations
great mullein
Verbascum thapsus
4,314 observations
eastern shooting star
Primula meadia
4,293 observations
common pawpaw
Asimina triloba
4,114 observations
Carolina horsenettle
Solanum carolinense
4,099 observations
American jumpseed
Persicaria virginiana
3,975 observations · iNaturalist
swamp milkweed
Asclepias incarnata
3,886 observations
black-eyed Susan
Rudbeckia hirta
3,876 observations
bittersweet nightshade
Solanum dulcamara
3,844 observations
red columbine
Aquilegia canadensis
3,809 observations
prairie dock
Silphium terebinthinaceum
3,783 observations
purple crownvetch
Securigera varia
3,780 observations · iNaturalist
multiflora rose
Rosa multiflora
3,776 observations
mock strawberry
Potentilla indica
3,733 observations · iNaturalist
common ragweed
Ambrosia artemisiifolia
3,722 observations
dame's rocket
Hesperis matronalis
3,667 observations · iNaturalist
Plants in nearby places
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