Vascular Plants of North Carolina
Account for Britton's Upland Boneset - Eupatorium sessilifolium var. brittonianum   Porter
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Section 6 » Order Asterales » Family Asteraceae
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AuthorPorter
DistributionSouthern Mountains only. Weakley (2018) mentions a specimen from Cedar Cliff in Buncombe County as the only one he is aware of from NC. SERNEC lists none under this name.

NH to MN, south to MD, KY, and MO; in mountains south to NC. Fernald (1950) states that this variety is commoner northward [than var. sessilifolium].
AbundanceNo data. Abundances are poorly known in NC, due to few records in the state specific to var. brittonianum.
Habitat"Circumneutral soils of woodlands at moderate elevations" (Weakley 2018). Habitats are poorly known in NC, due to few records in the state specific to var. brittonianum.
PhenologyAugust-September.
IdentificationClosely related to var. sessilifolium (which see), differing mainly in broader, ovate or ovate-lanceolate leaves (vs. lanceolate). In both varieties the leaves have long-tapering tips. One readily accessible description is in Fernald (1950).
Taxonomic CommentsClose enough to nominate sessilifolium that many authors do not recognize it at any level. Its taxonomic validity needs to be studied anew.

Other Common Name(s)Britton's Upland Eupatorium.
State RankS1? *
Global RankG5T3T5
State StatusW7
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