Vascular Plants of North Carolina
Account for Wedgeleaf Thoroughwort - Eupatorium glaucescens   Elliott
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Section 6 » Order Asterales » Family Asteraceae
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AuthorElliott
DistributionSandhills and southern half of the Coastal Plain; sparse in the northeastern portion of the Coastal Plain.

Coastal Plain, southeastern VA to FL and MS.
AbundanceFairly common to locally common in the Sandhills and some counties east and southeast of that region. Infrequent to frequent in the central counties, but very rare in the northeastern counties.
HabitatA species of sandy soils -- dry to xeric Longleaf Pine-Wiregrass uplands, Longleaf Pine-oak scrub, sandy clearings. Well-adapted to frequent fires.
PhenologyFlowering and fruiting late July-October.
IdentificationWedgeleaf Thoroughwort is a good name, as the lower leaves are indeed wider in the outer half. Mid-stem and upper leaves are often just elliptical in shape. Leaves are often somewhat twisted. Plants are mostly 1-2 feet tall, topped by a typical Eupatorium flat-topped inflorescence. Leaves of Mohr's Thoroughwort (E. mohrii) may also be wedge-shaped, but that species inhabits moist to wet soils. The very similar E. linearifolium has narrower leaves, only "3-8 mm wide, entire or remotely serrate apically" vs. "5-15 mm wide, crenate or serrate in the upper half" (Weakley 2018).
Taxonomic CommentsLong known by the name E. cuneifolium, which has been split into this species and E. linearifolium.

Other Common Name(s)Wedgeleaf Eupatorium, Waxy Thoroughwort, Small-flower Thoroughwort
State RankS3S4 [S4]
Global RankG5
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