Places › States › Illinois › Plants

Plants of Illinois

The plants most often spotted in Illinois, ranked by recent research-grade observations.

287,117
recent observations
50
species listed
50
plants

Naturalists have logged 287,117 research-grade observations across the 50 most-recorded species in Illinois. The most frequently seen is the Common Milkweed, with 13,297 recorded sightings.

Most-observed plants in Illinois

Common Milkweed
Asclepias syriaca
13,297 observations
Prairie Trillium
Trillium recurvatum
11,011 observations
Mayapple
Podophyllum peltatum
10,995 observations
Virginia Springbeauty
Claytonia virginica
10,355 observations
Virginia Bluebells
Mertensia virginica
9,076 observations
American Pokeweed
Phytolacca americana
8,589 observations
White Snakeroot
Ageratina altissima
7,946 observations
Wild Bergamot
Monarda fistulosa
7,655 observations
Amur Honeysuckle
Lonicera maackii
7,535 observations
Blue Phlox
Phlox divaricata
7,493 observations
Bloodroot
Sanguinaria canadensis
7,449 observations
Ground-ivy
Glechoma hederacea
6,982 observations · iNaturalist
Garlic Mustard
Alliaria petiolata
6,736 observations
Wild Geranium
Geranium maculatum
6,652 observations
Tall Bellflower
Campanulastrum americanum
6,481 observations · iNaturalist
Wild Carrot
Daucus carota
6,171 observations
Cut-leaved Toothwort
Cardamine concatenata
5,973 observations
Chicory
Cichorium intybus
5,705 observations
Butterfly Milkweed
Asclepias tuberosa
5,352 observations
Grey-headed Coneflower
Ratibida pinnata
5,282 observations
Dutchman's Breeches
Dicentra cucullaria
5,136 observations
Red Clover
Trifolium pratense
5,089 observations
Compass Plant
Silphium laciniatum
4,913 observations
Rattlesnake Master
Eryngium yuccifolium
4,900 observations
Box Elder
Acer negundo
4,820 observations
Jack-in-the-Pulpit
Arisaema triphyllum
4,785 observations
Butterweed
Packera glabella
4,745 observations · iNaturalist
White Fawnlily
Erythronium albidum
4,712 observations
White Clover
Trifolium repens
4,694 observations
Common Jewelweed
Impatiens capensis
4,656 observations
American Black Elderberry
Sambucus canadensis
4,635 observations
Cup Plant
Silphium perfoliatum
4,562 observations
Great Blue Lobelia
Lobelia siphilitica
4,527 observations
Eastern Redbud
Cercis canadensis
4,502 observations
Eastern Poison Ivy
Toxicodendron radicans
4,482 observations
Great Mullein
Verbascum thapsus
4,323 observations
Eastern Shooting Star
Primula meadia
4,295 observations
Common Pawpaw
Asimina triloba
4,141 observations
Carolina Horsenettle
Solanum carolinense
4,128 observations
American Jumpseed
Persicaria virginiana
4,013 observations · iNaturalist
New England Aster
Symphyotrichum novae-angliae
3,932 observations
Black-eyed Susan
Rudbeckia hirta
3,928 observations
Swamp Milkweed
Asclepias incarnata
3,893 observations
Bittersweet Nightshade
Solanum dulcamara
3,874 observations
Prairie Dock
Silphium terebinthinaceum
3,815 observations
Red Columbine
Aquilegia canadensis
3,814 observations
Purple Crownvetch
Securigera varia
3,797 observations · iNaturalist
Multiflora Rose
Rosa multiflora
3,787 observations
Common Ragweed
Ambrosia artemisiifolia
3,744 observations
Mock Strawberry
Potentilla indica
3,740 observations · iNaturalist

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

Plants in nearby places

Out spotting plants in Illinois?

Take Huck with you. Identify any plant you find in seconds and build your collection.

Get Huck

Love plants? Get Huck field notes

Spotting tips, new species, and the best of what people are finding in the wild - straight to your inbox.

By subscribing you agree to receive Huck emails. No spam, unsubscribe anytime. See our Privacy Policy.