Wildflowers Blooming in Massachusetts in August (60 Species)

60 wildflowers were recorded blooming in Massachusetts in August in our iNaturalist sample; 23 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 August

Sweet Pepperbush351 obs.

Purple Loosestrife343 obs.

Common Jewelweed340 obs.

Cardinal Flower319 obs.

Wild Carrot179 obs.

Bull Thistle165 obs.

Ghost Pipe163 obs.

American groundnut161 obs.

Common Tansy151 obs.

Swamp Rose Mallow145 obs.

Blue Vervain131 obs.

Chicory127 obs.

All wildflowers blooming in Massachusetts in August

#	Species	Scientific name	Family	Obs.	Peak in state
1	Sweet Pepperbush	Clethra alnifolia	clethra family	351	Aug (peak)
2	Purple Loosestrife	Lythrum salicaria	lythrum family	343	Aug (peak)
3	Common Jewelweed	Impatiens capensis	balsam family	340	Aug (peak)
4	Cardinal Flower	Lobelia cardinalis	bellflower family	319	Aug (peak)
5	Wild Carrot	Daucus carota	carrot family	179	Jul (past peak)
6	Bull Thistle	Cirsium vulgare	Sunflowers, Daisies, Asters, and Allies	165	Aug (peak)
7	Ghost Pipe	Monotropa uniflora	heath family	163	Jul (past peak)
8	American groundnut	Apios americana	Legumes	161	Aug (peak)
9	Common Tansy	Tanacetum vulgare	Sunflowers, Daisies, Asters, and Allies	151	Aug (peak)
10	Swamp Rose Mallow	Hibiscus moscheutos	Mallow and Hibiscus Family	145	Aug (peak)
11	Blue Vervain	Verbena hastata	Verbena Family	131	Jul (past peak)
12	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	127	Jul (past peak)
13	Common Boneset	Eupatorium perfoliatum	Sunflowers, Daisies, Asters, and Allies	123	Aug (peak)
14	Allegheny monkeyflower	Mimulus ringens	lopseed family	114	Jul (past peak)
15	Blue Curls	Trichostema dichotomum	Mint Family	103	Aug (peak)
16	Common Toadflax	Linaria vulgaris	Plantain Family	99	Sep (rising)
17	Panicled Hawkweed	Hieracium paniculatum	Sunflowers, Daisies, Asters, and Allies	99	Aug (peak)
18	White Meadowsweet	Spiraea alba	rose family	94	Jul (past peak)
19	Pickerelweed	Pontederia cordata	Pickerelweeds	93	Jul (past peak)
20	American hog-peanut	Amphicarpaea bracteata	Legumes	90	Aug (peak)
21	Flat-Topped Goldenrod	Euthamia graminifolia	Sunflowers, Daisies, Asters, and Allies	88	Aug (peak)
22	Bittersweet Nightshade	Solanum dulcamara	nightshade family	85	Jun (past peak)
23	American pokeweed	Phytolacca americana	Pokeweed Family	82	Jul (past peak)
24	Butterfly Milkweed	Asclepias tuberosa	Dogbane Family	78	Jul (past peak)
25	Bird's-Foot Trefoil	Lotus corniculatus	Legumes	77	Jun (past peak)
26	Asiatic dayflower	Commelina communis	Spiderworts	75	Sep (rising)
27	Porcelain Berry	Ampelopsis glandulosa	Grape Family	73	Aug (peak)
28	Red Clover	Trifolium pratense	Legumes	72	Jun (past peak)
29	Whorled Wood Aster	Oclemena acuminata	Sunflowers, Daisies, Asters, and Allies	72	Aug (peak)
30	Rugosa Rose	Rosa rugosa	rose family	71	Jun (past peak)
31	White Snakeroot	Ageratina altissima	Sunflowers, Daisies, Asters, and Allies	70	Sep (rising)
32	Flat-Top White Aster	Doellingeria umbellata	Sunflowers, Daisies, Asters, and Allies	66	Aug (peak)
33	Prickly Cucumber	Echinocystis lobata	gourd family	65	Aug (peak)
34	American white waterlily	Nymphaea odorata	Waterlily Family	65	Jul (past peak)
35	White Wood Aster	Eurybia divaricata	Sunflowers, Daisies, Asters, and Allies	65	Sep (rising)
36	Indian tobacco	Lobelia inflata	bellflower family	64	Jul (past peak)
37	Partridge Pea	Chamaecrista fasciculata	Legumes	64	Aug (peak)
38	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	62	Jul (past peak)
39	Common Soapwort	Saponaria officinalis	pink family	61	Jul (past peak)
40	Spotted Knapweed	Centaurea stoebe	Sunflowers, Daisies, Asters, and Allies	59	Jul (past peak)
41	Broadleaf Arrowhead	Sagittaria latifolia	Water-Plantain family	56	Aug (peak)
42	Low Smartweed	Persicaria longiseta	knotweed family	55	Sep (rising)
43	White Turtlehead	Chelone glabra	Plantain Family	54	Sep (rising)
44	Early Goldenrod	Solidago juncea	Sunflowers, Daisies, Asters, and Allies	54	Aug (peak)
45	Swamp Milkweed	Asclepias incarnata	Dogbane Family	51	Jul (past peak)
46	Steeplebush	Spiraea tomentosa	rose family	49	Jul (past peak)
47	Shining Sumac	Rhus copallinum	Cashew Family	49	Aug (peak)
48	Common Evening-Primrose	Oenothera biennis	evening primrose family	48	Aug (peak)
49	Horseweed	Erigeron canadensis	Sunflowers, Daisies, Asters, and Allies	48	Aug (peak)
50	Buttonbush	Cephalanthus occidentalis	madder family	46	Jul (past peak)