Calico Aster (Symphyotrichum lateriflorum)
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- Crooked-Stemmed Aster
Flowers of calico aster are small, typically 1/2 inch across, while those of crooked-stemmed aster are over 1 inch in diameter. Leaves of calico aster are lanceolate, while those of crooked-stemmed aster have an unusal, partially toothed form.
- Flat-Topped Aster
Flat-topped aster has a smooth leaf, while calico aster has a toothed leaf. Flowers of flat-topped aster grow in a umbel (flat cluster) while calico aster occur in a panicle (elongate cluster).