(formerly Aster oolentangiensis)
Other common names:
Sky Blue Aster|
Other scientific names:
Aster oolentangiensis, Aster azureus
Composite Family (Asteraceae)
Sparse azure blue ray flowers, Loose and open growth form. Leaves feel like fine sandpaper. Resembles Heart-leaved Aster, but the leaves are different, and is more open.
Heart-leaved Aster (Symphyotrichum cordifolium) - More compact, leaves deeply lobed at base.
Smooth Aster (Symphyotrichum laeve) - Leaves rubbery and smooth.
Fringed Blue Aster (Symphyotrichum ciliolatum) - Larger leaves.
Summer, Autumn; Blue/Violet; 7 or more parts (petals); Rays wide, relatively.
Alternate, Simple; Feel like fine sandpaper. Few teeth or toothless, not deeply lobed like those of Heart-leaved Aster. Lower leaves are long arrowhead-shaped.
50-100 cm (19-39 in)
Fields and Open Areas, Meadows; Dry areas, prairie-like areas, edges of woods. South Ontario only.
Grows in Sun/Shade:
Peterson's Field Guide to Wildflowers: 354
Not overly common, but not rare.
This Aster is hard to describe except in terms of what it's not. Generally it looks like an open Heart-leaved Aster, but without the distinctive leaves of that species. The flowers are smaller and more compact, the ray flowers are "chunkier". This would be one of the later Asters for a novice to learn.
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Range Map is at the bottom of the page