Vascular Plants of North Carolina
Account for Florida Thoroughwort - Eupatorium anomalum   Nash
Members of Asteraceae:
Members of Eupatorium with account distribution info or public map:
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Section 6 » Order Asterales » Family Asteraceae
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AuthorNash
DistributionIdentification of NC specimens is highly uncertain, owing to being recently split out from E. recurvans; they were collected in Bladen, Brunswick, Carteret, Columbus, Dare, Duplin, New Hanover, Pamlico, and Pender counties. If specimens are correctly identified, it occurs at scattered sites along and close to the southern coast, ranging north to Dare County. The BONAP map shows several coastal NC counties (and one for southeastern VA), but these (at least VA and Dare County) actually are the newly described E. maritimum. Weakley (2020) states that the range is north "NC?", and his map does show "rare" for the NC Coastal Plain. Thus, the website editors prefer to remain very cautious and not map any of the records onto the county range map, except for one from Pender County in the NCU collection, at the present time -- especially as only one of the numerous specimens is located at the more reliable NCU herbarium.

A Southeastern species ranging north to eastern SC, and apparently (but not conclusively) to eastern NC. It ranges south to central FL and southern MS.
AbundanceOf uncertain presence in the state, though perhaps rare if present at all. The NCNHP gives it a State Rank of S1? and tracks it as a Watch List species -- as W3 -- documentation lacking or poor, though the editors suggest W7 (documented but poorly known) might be closer to the truth.
HabitatThis is a species of wet pine savannas and flatwoods.
PhenologyFlowering and fruiting August-October.
IdentificationAll NC specimens need careful checking. From the Weakley (2018) key, this species and the closely related E. recurvans, plus E. mohrii, all have narrowly cuneate leaf bases, "the leaves generally broadest near the middle or toward the tip". These species also are "Plants from conspicuously tuberous-thickened (about 1 cm in diameter) horizontal rhizomes" (i.e., emerging singly from the ground) as opposed to emerging from crowns. And, this particular species has much wider leaves than the other two -- 15-30 mm wide, spreading or ascending, versus only 2-12 mm wide and deflexed to erect-ascending in E. recurvans and E. mohrii. The wide leaves, for a savanna Eupatorium species, is a clue that you might have this species.
Taxonomic CommentsThis is one of several species formerly included within E. recurvans. The newly described E. maritimum (which see) is known from Dare, Tyrrell, and Carteret counties and specimens were formerly determined as E. anomalum.

Other Common Name(s)None
State RankS1?
Global RankG2G3
State StatusW3 [W7]
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