Wildflowers Blooming in Montana in August (60 Species)

60 wildflowers were recorded blooming in Montana in August in our iNaturalist sample; 11 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 August

Fireweed300 obs.

Fringed Grass of Parnassus200 obs.

Lewis' monkeyflower132 obs.

Pearly Everlasting90 obs.

Mountain Bog Gentian80 obs.

Pipsissewa58 obs.

Rocky Mountain Beeplant44 obs.

Curlycup Gumweed35 obs.

Spotted Knapweed29 obs.

Threeleaf Foamflower25 obs.

Nodding Onion24 obs.

Common Tansy21 obs.

All wildflowers blooming in Montana in August

#	Species	Scientific name	Family	Obs.	Peak in state
1	Fireweed	Chamaenerion angustifolium	evening primrose family	300	Jul (past peak)
2	Fringed Grass of Parnassus	Parnassia fimbriata	staff-vine family	200	Aug (peak)
3	Lewis' monkeyflower	Erythranthe lewisii	lopseed family	132	Aug (peak)
4	Pearly Everlasting	Anaphalis margaritacea	Sunflowers, Daisies, Asters, and Allies	90	Jul (past peak)
5	Mountain Bog Gentian	Gentiana calycosa	gentian family	80	Aug (peak)
6	Pipsissewa	Chimaphila umbellata	heath family	58	Jul (past peak)
7	Rocky Mountain Beeplant	Cleomella serrulata	Spider Flower Family	44	Aug (peak)
8	Curlycup Gumweed	Grindelia squarrosa	Sunflowers, Daisies, Asters, and Allies	35	Aug (peak)
9	Spotted Knapweed	Centaurea stoebe	Sunflowers, Daisies, Asters, and Allies	29	Jul (past peak)
10	Threeleaf Foamflower	Tiarella trifoliata	saxifrage family	25	Jul (past peak)
11	Nodding Onion	Allium cernuum	amaryllis, onions, and allies	24	Jul (past peak)
12	Common Tansy	Tanacetum vulgare	Sunflowers, Daisies, Asters, and Allies	21	Aug (peak)
13	Western Harebell	Campanula petiolata	bellflower family	13	Jul (past peak)
14	Northern Bedstraw	Galium boreale	madder family	10	Jul (past peak)
15	Gunnison's Mariposa Lily	Calochortus gunnisonii	lily family	10	Jul (past peak)
16	Dwarf Fireweed	Chamaenerion latifolium	evening primrose family	10	Jul (past peak)
17	Spreading Dogbane	Apocynum androsaemifolium	Dogbane Family	9	Jun (past peak)
18	Common Toadflax	Linaria vulgaris	Plantain Family	9	Jul (past peak)
19	Elephant's-Head lousewort	Pedicularis groenlandica	broomrape family	9	Jul (past peak)
20	Musk Thistle	Carduus nutans	Sunflowers, Daisies, Asters, and Allies	9	Jun (past peak)
21	Upright Prairie Coneflower	Ratibida columnifera	Sunflowers, Daisies, Asters, and Allies	9	Jul (past peak)
22	Field Bindweed	Convolvulus arvensis	bindweed family	8	Jun (past peak)
23	Shrubby Cinquefoil	Dasiphora fruticosa	rose family	8	Jun (past peak)
24	Red Clover	Trifolium pratense	Legumes	7	Jun (past peak)
25	Yellow Sweetclover	Melilotus officinalis	Legumes	7	Jun (past peak)
26	Common Beargrass	Xerophyllum tenax	Herb-Paris, False Hellebores, Trilliums and allies	7	Jun (past peak)
27	Ghost Pipe	Monotropa uniflora	heath family	6	Aug (peak)
28	Common Yarrow	Achillea millefolium	Sunflowers, Daisies, Asters, and Allies	6	Jul (past peak)
29	Yellow Salsify	Tragopogon dubius	Sunflowers, Daisies, Asters, and Allies	6	Jun (past peak)
30	Creeping Thistle	Cirsium arvense	Sunflowers, Daisies, Asters, and Allies	6	Aug (peak)
31	Spineless Horsebrush	Tetradymia canescens	Sunflowers, Daisies, Asters, and Allies	6	Jul (past peak)
32	Seep Monkeyflower	Erythranthe guttata	lopseed family	6	Jul (past peak)
33	Common Snowberry	Symphoricarpos albus	honeysuckle family	5	Jul (past peak)
34	Red Osier Dogwood	Cornus sericea	Dogwood family	5	Jun (past peak)
35	Monument Plant	Frasera speciosa	gentian family	5	Jun (past peak)
36	Hoary Alyssum	Berteroa incana	mustard family	5	Jul (past peak)
37	American bistort	Bistorta bistortoides	knotweed family	5	Aug (peak)
38	Creeping Bellflower	Campanula rapunculoides	bellflower family	5	Aug (peak)
39	Bird's-Foot Trefoil	Lotus corniculatus	Legumes	4	Jun (past peak)
40	Common Cowparsnip	Heracleum maximum	carrot family	4	Jun (past peak)
41	Bittersweet Nightshade	Solanum dulcamara	nightshade family	4	Aug (peak)
42	Alfalfa	Medicago sativa	Legumes	4	Sep (rising)
43	Great Mullein	Verbascum thapsus	figwort family	4	Jul (past peak)
44	Lewis flax	Linum lewisii	Flax Family	4	Jul (past peak)
45	Showy Milkweed	Asclepias speciosa	Dogbane Family	4	Jul (past peak)
46	Richardson's geranium	Geranium richardsonii	Geranium family	4	Jun (past peak)
47	Edible Valerian	Valeriana edulis	honeysuckle family	4	Jun (past peak)
48	Common Selfheal	Prunella vulgaris	Mint Family	3	Jul (past peak)
49	Poison Hemlock	Conium maculatum	carrot family	3	Jul (past peak)
50	Oxeye Daisy	Leucanthemum vulgare	Sunflowers, Daisies, Asters, and Allies	3	Jul (past peak)