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Key to Symphyotrichum, Key H: perennial asters with blue-glaucous stems and leaves

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1 Leaves strongly basally disposed, much reduced on the mid and upper stem and the basal and lower stem leaves sometimes withering by anthesis; leaf blades linear or linear-lanceolate (lower) to linear-subulate (upper stem), > 10× as long as wide; leaf margins strongly scabrous; [West Gulf Coastal Plain]
1 Leaves cauline; leaf blades ovate to lanceolate, mostly < 9× as long as wide; leaf margins not strongly scabrous; [widespread].
  2 Larger leaves > 5× as long as wide, rarely > 2.5 cm wide, the bases slightly clasping; [dry glades and barrens]
  2 Larger leaves < 5× as long as wide, often > 2.5 cm wide, the bases strongly clasping; [mesic forests and prairies, widespread northwards]