Vascular Plants of North Carolina
Account for Common Camphorweed - Heterotheca latifolia   Buckley
Members of Asteraceae:
Members of Heterotheca with account distribution info or public map:
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Section 6 » Family Asteraceae
DistributionThroughout most of the Coastal Plain, Sandhills, and southern Piedmont; scarce in the southern Mountains. Seemingly absent from the northern Piedmont and most of the Mountains. Apparently recently split from H. subaxillaris -- here considered as a native species, and thus the full range of the alien H. latifolia might be understated from the map below. Weakley (2020) goes back and re-lumps this taxon within H. subaxillaris.

Native of south-central U.S. and Mexico; Weakley (2018) considers it as native eastward only to AR and LA.
AbundanceUncommon to locally frequent, except rare in the Mountains. The taxon that is often commonly seen along and near the coast is H. subaxillaris.
HabitatDry sandy roadsides, railroad margins, fields, cropfields, waste places, clearings.
PhenologyFlowering and fruiting August-October.
IdentificationCommon Camphorweed is an annual or biennial, coarse, branched plant mostly 1.5-3 feet tall. The middle and upper stem leaves are rather sessile, the lower leaves with stalks; all with a camphor-like odor due to stipitate glands. The rays and disks are golden yellow. Note the non-maritime habitats (contra H. subaxillaris of maritime dunes and sand flats). Weakley (2018) indicates that Common Camphorweed is an erect plant (up to 6 feet tall), whereas the other is erect or decumbent, only to 3 feet tall at best; it also has leaves that are hirsute on both sides or scabrous above, vs. scabrous on both sides or only below for H. subaxillaris.
Taxonomic CommentsRAB (1968) and some other references included this taxon within H. subaxillaris.

Other Common Name(s)Usually just called as Camphorweed, but so too is H. subaxillaris, and thus both species need modifier names. Weakley (2018) uses Common Camphorweed for this species and Dune Camphorweed for the other one.
State RankSYN
Global RankGNR
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