Wildflowers Blooming in Illinois in May (60 Species)

60 wildflowers were recorded blooming in Illinois in May in our iNaturalist sample; 29 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Feb Mar Apr May Jun Jul Aug Sep Oct Nov

Top wildflowers in May

Prairie Trillium1,054 obs.

Eastern Shooting Star752 obs.

Virginia bluebells677 obs.

Large White Trillium620 obs.

Garlic Mustard544 obs.

Red Columbine487 obs.

Atlantic camas458 obs.

Wild Geranium385 obs.

Mayapple257 obs.

Dame's Rocket230 obs.

common star-of-Bethlehem229 obs.

Jack-in-the-Pulpit212 obs.

All wildflowers blooming in Illinois in May

#	Species	Scientific name	Family	Obs.	Peak in state
1	Prairie Trillium	Trillium recurvatum	Herb-Paris, False Hellebores, Trilliums and allies	1,054	May (peak)
2	Eastern Shooting Star	Primula meadia	primrose family	752	May (peak)
3	Virginia bluebells	Mertensia virginica	borage family	677	Apr (past peak)
4	Large White Trillium	Trillium grandiflorum	Herb-Paris, False Hellebores, Trilliums and allies	620	May (peak)
5	Garlic Mustard	Alliaria petiolata	mustard family	544	May (peak)
6	Red Columbine	Aquilegia canadensis	buttercup family	487	May (peak)
7	Atlantic camas	Camassia scilloides	agave and allies	458	May (peak)
8	Wild Geranium	Geranium maculatum	Geranium family	385	May (peak)
9	Mayapple	Podophyllum peltatum	barberry family	257	May (peak)
10	Dame's Rocket	Hesperis matronalis	mustard family	230	May (peak)
11	common star-of-Bethlehem	Ornithogalum umbellatum	agave and allies	229	May (peak)
12	Jack-in-the-Pulpit	Arisaema triphyllum	Arum Family	212	May (peak)
13	Virginia Springbeauty	Claytonia virginica	Pussypaw Family	202	Apr (past peak)
14	Small White Lady's-Slipper	Cypripedium candidum	Orchids	200	May (peak)
15	Catchweed Bedstraw	Galium aparine	madder family	181	May (peak)
16	Blue Phlox	Phlox divaricata	phlox family	179	Apr (past peak)
17	Ohio spiderwort	Tradescantia ohiensis	Spiderworts	176	Jun (rising)
18	Star-Flowered Lily-Of-The-Valley	Maianthemum stellatum	agave and allies	149	May (peak)
19	Canadian lousewort	Pedicularis canadensis	broomrape family	146	May (peak)
20	Ground-Ivy	Glechoma hederacea	Mint Family	144	Apr (past peak)
21	Common Pawpaw	Asimina triloba	custard-apples	142	Apr (past peak)
22	Hoary Puccoon	Lithospermum canescens	borage family	135	May (peak)
23	Dutchman's breeches	Dicentra cucullaria	Poppy Family	130	Apr (past peak)
24	European lily of the valley	Convallaria majalis	agave and allies	129	May (peak)
25	golden Alexanders	Zizia aurea	carrot family	127	May (peak)
26	American bladdernut	Staphylea trifolia	bladdernut family	126	Apr (past peak)
27	Virginia waterleaf	Hydrophyllum virginianum	borage family	120	May (peak)
28	Multiflora Rose	Rosa multiflora	rose family	112	Jun (rising)
29	Drooping Trillium	Trillium flexipes	Herb-Paris, False Hellebores, Trilliums and allies	104	May (peak)
30	Butterweed	Packera glabella	Sunflowers, Daisies, Asters, and Allies	98	May (peak)
31	Great Waterleaf	Hydrophyllum appendiculatum	borage family	98	May (peak)
32	Amur honeysuckle	Lonicera maackii	honeysuckle family	95	May (peak)
33	Yellow Star Grass	Hypoxis hirsuta	Stargrasses and allies	91	May (peak)
34	Marsh Marigold	Caltha palustris	buttercup family	83	Apr (past peak)
35	Philadelphia fleabane	Erigeron philadelphicus	Sunflowers, Daisies, Asters, and Allies	83	May (peak)
36	Early Meadow-Rue	Thalictrum dioicum	buttercup family	83	Apr (past peak)
37	Mock Strawberry	Potentilla indica	rose family	81	May (peak)
38	Jacob's ladder	Polemonium reptans	phlox family	80	Apr (past peak)
39	Virginia strawberry	Fragaria virginiana	rose family	79	Apr (past peak)
40	Aniseroot	Osmorhiza longistylis	carrot family	77	May (peak)
41	Red Deadnettle	Lamium purpureum	Mint Family	74	Apr (past peak)
42	Red Clover	Trifolium pratense	Legumes	73	Jun (rising)
43	Common Hoptree	Ptelea trifoliata	citrus family	72	Jun (rising)
44	Poison Hemlock	Conium maculatum	carrot family	71	May (peak)
45	Celandine Poppy	Chelidonium diphyllum	Poppy Family	71	Apr (past peak)
46	Wood Anemone	Anemonoides quinquefolia	buttercup family	69	Apr (past peak)
47	Solomon's plume	Maianthemum racemosum	agave and allies	66	May (peak)
48	White Clover	Trifolium repens	Legumes	65	Jun (rising)
49	Largeflower Bellwort	Uvularia grandiflora	Bellworts and allies	64	Apr (past peak)
50	Field Bindweed	Convolvulus arvensis	bindweed family	63	Jun (rising)