(formerly Aster sagittifolius)
Other common names:
White Arrowleaf Aster|
Other scientific names:
Aster sagittifolius, Aster hirtellus, Aster urophyllus
Composite Family (Asteraceae)
Leaves are sort of arrow-shaped, without a deep cleft at base. Branches sweep upward, close to main stem.
Heart-leaved Aster (Symphyotrichum cordifolium) - Leaves larger and more heart-shaped.
Calico Aster (Symphyotrichum lateriflorum) - Same habitat, smaller plant, horizontal branches, smaller leaves.
Large-leaved Aster (Eurybia macrophylla) - In the woods; flower head is flat-topped; leaves are much larger.
Azure Aster (Symphyotrichum oolentangiense)
Summer, Autumn; White; 7 or more parts (petals); 1.5cm in diameter. Ray flowers: 8-15, usually white, sometimes pale pink or bluish. Disc flowers: 8-20, yellow becoming purple. Flower heads are a panicle shape. Many flowers are arrayed along upward sweeping branches.
Sparse, arrow-shaped, but in the form of a spear point, not the form of -> or <-. Narrowly egg-shaped and shallowly toothed. Leaf stalks (petioles) winged. Lower leaves may be somewhat heart-shaped. Lower leaves are the largest.
40-100 cm (15-39 in)
Smooth to somewhat hairy. Side branches are upward sweeping.
Fields and Open Areas; Forest edges or dry open areas of woods. Widely distributed in southern Ontario.
Grows in Sun/Shade:
Newcomb's Wildflower Guide: 454
Peterson's Field Guide to Wildflowers: 354
This Aster grows on the edges of forests. It is most easily confused with Heart-leaved Aster (Symphyotrichum cordifolium), which often grows very near or in the same area. It can also be confused with Calico Aster (Symphyotrichum lateriflorum) by the novice.
153 photographs available, of which 18 are featured on this page. SCROLL DOWN FOR PHOTOGRAPHS.
Range Map is at the bottom of the page