Wildflowers Blooming in Montana in May (46 Species)

46 wildflowers were recorded blooming in Montana in May in our iNaturalist sample; 22 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Apr May Jun Jul Aug Sep Oct

Top wildflowers in May

Arrowleaf Balsamroot151 obs.

Pacific trillium148 obs.

Bearberry143 obs.

Yellow Fritillary116 obs.

Glacier Lily101 obs.

Prairie Pasqueflower99 obs.

Saskatoon81 obs.

Large-Flowered Triteleia70 obs.

Small Camas67 obs.

Prairie Smoke46 obs.

Spotted Fritillary37 obs.

Virginia strawberry36 obs.

All wildflowers blooming in Montana in May

#	Species	Scientific name	Family	Obs.	Peak in state
1	Arrowleaf Balsamroot	Balsamorhiza sagittata	Sunflowers, Daisies, Asters, and Allies	151	Jun (rising)
2	Pacific trillium	Trillium ovatum	Herb-Paris, False Hellebores, Trilliums and allies	148	May (peak)
3	Bearberry	Arctostaphylos uva-ursi	heath family	143	May (peak)
4	Yellow Fritillary	Fritillaria pudica	lily family	116	Apr (past peak)
5	Glacier Lily	Erythronium grandiflorum	lily family	101	Jun (rising)
6	Prairie Pasqueflower	Pulsatilla nuttalliana	buttercup family	99	Apr (past peak)
7	Saskatoon	Amelanchier alnifolia	rose family	81	May (peak)
8	Large-Flowered Triteleia	Triteleia grandiflora	agave and allies	70	May (peak)
9	Small Camas	Camassia quamash	agave and allies	67	Jun (rising)
10	Prairie Smoke	Geum triflorum	rose family	46	May (peak)
11	Spotted Fritillary	Fritillaria atropurpurea	lily family	37	Jun (rising)
12	Virginia strawberry	Fragaria virginiana	rose family	36	Jun (rising)
13	Creeping Mahonia	Berberis repens	barberry family	36	May (peak)
14	Sagebrush Buttercup	Ranunculus glaberrimus	buttercup family	34	Apr (past peak)
15	Star-Flowered Lily-Of-The-Valley	Maianthemum stellatum	agave and allies	23	Jun (rising)
16	Common Starlily	Leucocrinum montanum	agave and allies	18	May (peak)
17	Bitterroot	Lewisia rediviva	Pussypaw Family	16	Jun (rising)
18	Chokecherry	Prunus virginiana	rose family	15	May (peak)
19	Golden Currant	Ribes aureum	Gooseberry Family	15	May (peak)
20	Corn Gromwell	Buglossoides arvensis	borage family	15	Jun (rising)
21	Field Penny-Cress	Thlaspi arvense	mustard family	11	May (peak)
22	Edible Valerian	Valeriana edulis	honeysuckle family	10	Jun (rising)
23	Redstem Stork's-bill	Erodium cicutarium	Geranium family	9	May (peak)
24	Woodland Strawberry	Fragaria vesca	rose family	9	May (peak)
25	Dame's Rocket	Hesperis matronalis	mustard family	8	Jun (rising)
26	Red-Berried Elder	Sambucus racemosa	elder family	8	Jun (rising)
27	Canada Violet	Viola canadensis	Violet Family	8	Jun (rising)
28	Monument Plant	Frasera speciosa	gentian family	7	Jun (rising)
29	Solomon's plume	Maianthemum racemosum	agave and allies	6	Jun (rising)
30	Narrowleaf Puccoon	Lithospermum incisum	borage family	6	May (peak)
31	Longhorn Steer's-Head	Dicentra uniflora	Poppy Family	6	May (peak)
32	Antelope Bitterbrush	Purshia tridentata	rose family	6	May (peak)
33	Common Dandelion	Taraxacum officinale	Sunflowers, Daisies, Asters, and Allies	5	May (peak)
34	Yellow Salsify	Tragopogon dubius	Sunflowers, Daisies, Asters, and Allies	5	Jun (rising)
35	Common Beargrass	Xerophyllum tenax	Herb-Paris, False Hellebores, Trilliums and allies	5	Jun (rising)
36	Stream Violet	Viola glabella	Violet Family	5	May (peak)
37	American plum	Prunus americana	rose family	4	May (peak)
38	Spotted Coralroot	Corallorhiza maculata	Orchids	4	Jun (rising)
39	Henbit Deadnettle	Lamium amplexicaule	Mint Family	4	May (peak)
40	Arctic Butterbur	Petasites frigidus	Sunflowers, Daisies, Asters, and Allies	4	May (peak)
41	Common Whitlowgrass	Draba verna	mustard family	4	Apr (past peak)
42	Shepherd's-Purse	Capsella bursa-pastoris	mustard family	4	May (peak)
43	Bastard Toadflax	Comandra umbellata	sandalwood family	4	May (peak)
44	Western Skunk Cabbage	Lysichiton americanus	Arum Family	3	Apr (past peak)
45	Red Osier Dogwood	Cornus sericea	Dogwood family	3	Jun (rising)
46	Black Medick	Medicago lupulina	Legumes	3	Jun (rising)