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Allium allegheniense Small. Allegheny Onion. Phen: Jul-early Sep; Aug-Oct. Hab: In thin soils around outcrops, generally of mafic rocks (such as amphibolite or hornblende gneiss) or calcareous rocks, primarily at moderate to fairly high elevations (1000-1600m). Dist: Known from w. VA and e. WV south through w. NC to n. GA.

Origin/Endemic status: Endemic

Taxonomy Comments: Although not recognized by many recent authors, A. allegheniense seems distinctive enough in morphology, ecology, and distribution to warrant taxonomic recognition at some level; additional study is needed.

Synonymy: = K1, K3, K4, S, S13, Va; < Allium cernuum Roth – C, F, FNA26, G, RAB, W

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Wetland Indicator Status:

  • Eastern Mountains and Piedmont: FACU (taxonomic split from wetland indicator species)
  • Great Plains: UPL (taxonomic split from wetland indicator species)
  • Midwest: FACU (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)

Heliophily: 8

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image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Bruce Sorrie | Original Image ⭷

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