Symphyotrichum undulatum

Ecology:	Open, upland woods and clearings; esp. rocky, dry.
Blooming Period:	Late August into mid-October
Typical Height Range:	2 to 3 feet (6 to 9 dm)
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What to look for in the field:
Capitulescence is in the shape of a panicle. Branches are straight, widely spreading, but not recurved. Heads may be few to many, but neither very crowded nor in one-sided arrays.
Stems are mostly straight but sometimes slightly bent at the nodes, densely short-pubescent, somewhat rough to the touch.
Leaves are highly variable in shape. Basal leaves are often deciduous by flowering. Lower stem leaves are heart-shaped, on long, narrow petioles that flare at the base and clasp the stem. Mid- to upper stem leaves are clasping, with "wavy" (not flat) edges, and become progressively smaller, less heart-shaped, and have more broadly-winged petioles or eventually even become sessile.
Heads are medium size, from 1.9 to 2.6 cm wide. Rays are pale blue-violet. Disc florets are bright yellow, turning purple. Involucres are vase- or bell-shaped. Phyllaries are pubescent but not glandular, and not spreading. Peduncles are long, and bear numerous tiny leaflets (bracts) that lie flat against the peduncle. View image of involucre and phyllaries.
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State Status *	CT	MA	RI	VT	NH	ME
State Status *	P	P	P	P	P	P