Vascular Plants of North Carolina
Account for Broadleaf Ironweed - Vernonia glauca   (L.) Willdenow
Members of Asteraceae:
Members of Vernonia with account distribution info or public map:
Google Images
Section 6 » Order Asterales » Family Asteraceae
Show/Hide Synonym
Author(L.) Willdenow
DistributionAlmost restricted to the Piedmont; rare in the mountains and western/central parts of the Coastal Plain.

NJ and PA, south to FL, AL, and MS.
AbundanceFrequent to common in the Piedmont, the primary upland species of ironweed in that province. Rare in the western parts of the Coastal Plain (absent from Sandhills proper), and very rare in the Mountains (Haywood and Buncombe Counties only?). The State Rank should be moved to S5.
HabitatDry to mesic, deciduous and pine-deciduous woodlands, edges and openings in these forests, slopes along creeks, roadside banks. This is an upland species; Weakley's (2018) habitat listing of "Pastures, bottomlands, streamsides" is incorrect and appears to be a copying error, as that is the exact same wording for the species above (V. gigantea) and below (V. noveboracensis) it in his reference.
PhenologyFlowering and fruiting late June-September.
IdentificationThe bicolored leaves -- dark green above and pale gray or whitish beneath -- should clinch identification when compared with other ironweeds. Plants grow 2-3 feet tall, the leaves are elliptical and tapered to both ends, except for the lower ones, which are much wider towards the tip. As with other ironweeds, the inflorescence consists of a number of ascending branches in the upper portions, with the heads topping each branch consisting of rose-purple ray flowers only -- forming a rather flat-topped and showy flower cluster. This species does not tend to grow in colonies or dense stands, mostly found as singles or scattered individuals.
Taxonomic CommentsNone

Other Common Name(s)Appalachian Ironweed, Upland Ironweed
State RankS4 [S5]
Global RankG5
State Status
US Status
County Map - click on a county to view source of record.
Photo Gallery
B.A. SorriePiedmont, Iredell soil area SW of Carbonton, July 2018. MoorePhoto_natural
Select a source
Select an occurrence type