Bases of Leaves not Clasping Stem; Leaves Elongate, Grass-like, not Wider in the Middle than at the Apex or Base

Bushy Aster Symphyotrichum dumosum	Bog Aster Oclemena nemoralis	Stiff Aster Ionactis linariifolius
Rush Aster Symphyotrichum boreale	Perennial Salt-Marsh Aster Symphyotrichum tenuifolium	Annual Salt-Marsh Aster Symphyotrichum subulatum