(formerly Aster cordifolius)
Other common names:
Blue Wood Aster, Common Blue Wood Aster|
Other scientific names:
Aster cordifolius, Aster choralis, Aster finkii, Aster lowrieanus, Aster plumarius, Aster sagittifolius, Symphyotrichum sagittifolium
Aster à feuilles cordées
Composite Family (Asteraceae)
Heart-shaped leaves. Flowers in a dense rounded panicle (ie, not flat-topped).
Azure Aster (Symphyotrichum oolentangiense) - leaves of this species are in between Arrow-leaved Aster and Heart-leaved Aster.
Arrow-leaved Aster (Symphyotrichum urophyllum) - leaves not deeply cleft at all.
Large-leaved Aster (Eurybia macrophylla) - leaves much larger, not as deeply cleft. Flowers in a flat-topped head, usually white.
Summer, Autumn; Blue/Violet; 7 or more parts (petals); 1.5cm in diameter. Ray flowers: 8-15, pale blue, blue-violet, rose, or mauve; sometimes white. Disc flowers: 14-20, yellow becoming purple. Flowers are arranged in a rounded panicle in dense clusters.
Alternate, Simple, Toothed; Basal leaves are heart-shaped, with a very deep cleft at the base of the leaf. Upper stem leaves are still somewhat heart-shaped, but without a deep cleft, or have a much shallower cleft - resemble leaves of Arrow-leaved Aster (Symphyotrichum urophyllum). Conspicuously & jaggedly toothed.
60-90 cm (23-35 in)
Forests, Fields and Open Areas; Open woods and edges of woods.
Grows in Sun/Shade:
Newcomb's Wildflower Guide: 454
Peterson's Field Guide to Wildflowers: 354
This is a fairly easy Aster to identify, and is fairly common. The leaves are distinctive, but they may be confused with the similar species listed above.
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Range Map is at the bottom of the page