Appearance
''Symphyotrichum boreale'' is a perennial herbaceous species between 13 and 85 cm tall. The leaves, stem, and overall plant form are slender, and it produces long rhizomes. The inflorescence consists of one to several composite flowers. The ray florets are white to pale purple and the disc florets are cream or pale yellow-coloured, becoming purplish.
Distribution
''Symphyotrichum boreale'' is native to northern North America from Alaska to Newfoundland, and south to Colorado and West Virginia. It is found in wet, calcareous habitats including fens, marshes, swamps and wet meadows.
Habitat
''Symphyotrichum boreale'' is native to northern North America from Alaska to Newfoundland, and south to Colorado and West Virginia. It is found in wet, calcareous habitats including fens, marshes, swamps and wet meadows.In addition to vegetative spread via rhizomes, dispersal is accomplished by wind-blown seed.The roots are colonised by fungi including arbuscular mycorrhiza and dark septate endophytes. The sac fungus ''Erysiphe cichoracearum'', which causes a powdery mildew, is also known from this species.
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