Wildflowers Blooming in Wisconsin in May (60 Species)

60 wildflowers were recorded blooming in Wisconsin in May in our iNaturalist sample; 42 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Mar Apr May Jun Jul Aug Sep Oct Nov

Top wildflowers in May

Large White Trillium1,486 obs.

Red Columbine745 obs.

Wild Geranium558 obs.

Wood Anemone529 obs.

Jack-in-the-Pulpit473 obs.

Marsh Marigold449 obs.

Northern Starflower401 obs.

Dutchman's breeches296 obs.

Bloodroot259 obs.

Hoary Puccoon247 obs.

Garlic Mustard238 obs.

Eastern Shooting Star232 obs.

All wildflowers blooming in Wisconsin in May

#	Species	Scientific name	Family	Obs.	Peak in state
1	Large White Trillium	Trillium grandiflorum	Herb-Paris, False Hellebores, Trilliums and allies	1,486	May (peak)
2	Red Columbine	Aquilegia canadensis	buttercup family	745	May (peak)
3	Wild Geranium	Geranium maculatum	Geranium family	558	May (peak)
4	Wood Anemone	Anemonoides quinquefolia	buttercup family	529	May (peak)
5	Jack-in-the-Pulpit	Arisaema triphyllum	Arum Family	473	May (peak)
6	Marsh Marigold	Caltha palustris	buttercup family	449	May (peak)
7	Northern Starflower	Lysimachia borealis	primrose family	401	May (peak)
8	Dutchman's breeches	Dicentra cucullaria	Poppy Family	296	Apr (past peak)
9	Bloodroot	Sanguinaria canadensis	Poppy Family	259	Apr (past peak)
10	Hoary Puccoon	Lithospermum canescens	borage family	247	May (peak)
11	Garlic Mustard	Alliaria petiolata	mustard family	238	May (peak)
12	Eastern Shooting Star	Primula meadia	primrose family	232	May (peak)
13	Bird's Foot Violet	Viola pedata	Violet Family	225	May (peak)
14	Virginia bluebells	Mertensia virginica	borage family	222	Apr (past peak)
15	Virginia Springbeauty	Claytonia virginica	Pussypaw Family	221	May (peak)
16	Dame's Rocket	Hesperis matronalis	mustard family	217	May (peak)
17	Largeflower Bellwort	Uvularia grandiflora	Bellworts and allies	194	May (peak)
18	Mayapple	Podophyllum peltatum	barberry family	190	May (peak)
19	Virginia waterleaf	Hydrophyllum virginianum	borage family	189	May (peak)
20	Fringed Polygala	Polygaloides paucifolia	milkworts	183	May (peak)
21	Pink Lady's Slipper	Cypripedium acaule	Orchids	172	Jun (rising)
22	Ground-Ivy	Glechoma hederacea	Mint Family	169	May (peak)
23	Sundial Lupine	Lupinus perennis	Legumes	161	Jun (rising)
24	Prairie Trillium	Trillium recurvatum	Herb-Paris, False Hellebores, Trilliums and allies	157	May (peak)
25	Drooping Trillium	Trillium flexipes	Herb-Paris, False Hellebores, Trilliums and allies	156	May (peak)
26	Catchweed Bedstraw	Galium aparine	madder family	151	May (peak)
27	Star-Flowered Lily-Of-The-Valley	Maianthemum stellatum	agave and allies	138	May (peak)
28	Virginia strawberry	Fragaria virginiana	rose family	124	May (peak)
29	Canadian lousewort	Pedicularis canadensis	broomrape family	122	May (peak)
30	Nodding Trillium	Trillium cernuum	Herb-Paris, False Hellebores, Trilliums and allies	118	May (peak)
31	Red-Berried Elder	Sambucus racemosa	elder family	117	May (peak)
32	Canada mayflower	Maianthemum canadense	agave and allies	115	Jun (rising)
33	Yellow Lady's Slipper	Cypripedium parviflorum	Orchids	112	Jun (rising)
34	Trailing Arbutus	Epigaea repens	heath family	111	May (peak)
35	European lily of the valley	Convallaria majalis	agave and allies	109	May (peak)
36	Yellow Trout Lily	Erythronium americanum	lily family	109	May (peak)
37	Small White Lady's-Slipper	Cypripedium candidum	Orchids	107	May (peak)
38	White Fawnlily	Erythronium albidum	lily family	105	Apr (past peak)
39	Jacob's ladder	Polemonium reptans	phlox family	92	May (peak)
40	Twoleaf Miterwort	Mitella diphylla	saxifrage family	91	May (peak)
41	Lowbush Blueberry	Vaccinium angustifolium	heath family	90	May (peak)
42	American bladdernut	Staphylea trifolia	bladdernut family	90	May (peak)
43	Bitter Wintercress	Barbarea vulgaris	mustard family	89	May (peak)
44	Blue Phlox	Phlox divaricata	phlox family	89	May (peak)
45	Blue Cohosh	Caulophyllum thalictroides	barberry family	89	May (peak)
46	Dwarf Ginseng	Panax trifolius	ivy family	87	May (peak)
47	Sessile Bellwort	Uvularia sessilifolia	Bellworts and allies	85	May (peak)
48	golden Alexanders	Zizia aurea	carrot family	84	May (peak)
49	Swamp Laurel	Kalmia polifolia	heath family	83	May (peak)
50	Yellow Star Grass	Hypoxis hirsuta	Stargrasses and allies	80	May (peak)