Vascular Plants of North Carolina
Account for Clasping Roundleaf Thoroughwort - Eupatorium cordigerum   (Fernald) Fernald
Members of Asteraceae:
Members of Eupatorium with account distribution info or public map:
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Section 6 » Family Asteraceae
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Author(Fernald) Fernald
DistributionPoorly known to most botanists, and the range is not fully fleshed out owing to taxonomic issues. Northern Piedmont and northern Coastal Plain; a few records scattered in the low Mountains and southern Piedmont. Weakley's (2018) map shows a range in NC only in the Coastal Plain. Thus, the ultimate range in the state is quite uncertain at the present time.

FNA shows a range of NJ, VA, NC, SC, MS, AR. Weakley (2018) says "VA, NC, and SC west to AR and MS".
AbundanceNo data. Weakley (2018) calls it "rare" and only in the Coastal Plain. If the SERNEC specimens can be trusted, and with 15 county records scattered over the state, it might be uncommon or infrequent, as opposed to rare. The website editors have assigned a State Rank of S3? for the present time. NatureServe lists the taxon as a variety of E. rotundifolium, with a rank of G5TNR (taxon not ranked). Thus, if a full species, it would be given a global Rank of GNR.
HabitatWoodland margins in moist soil. More habitat information needed.
PhenologyFlowering and fruiting late July-October.
IdentificationPlants grow to 3-4 feet tall, with sessile, rough-textured, pubescent leaves, with clasping leaf bases. Both parents may occur nearby. At first glance, it may look like E. rotundifolium but with somewhat less rounded leaves than that species; look for the clasping leaf bases.
Taxonomic CommentsThis species is "an apomictic polyploid hybrid of E. rotundifolium and E. perfoliatum" (FNA). A synonym is E. rotundifolium var. cordigerum.

Other Common Name(s)Clasping Roundleaf Eupatorium
State Rank[S3?]
Global Rank[GNR]
State Status
US Status
County Map - click on a county to view source of record.
Photo Gallery
Bryan EnglandWilkerson Nature Preserve in north Raleigh WakePhoto_natural
Bryan Englandleaf base and stems WakePhoto_natural
Bryan Englandlead width WakePhoto_natural
Bryan Englandflorets WakePhoto_natural
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