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:
Flora of SE USGoogle 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 the 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.
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. Don't confuse this species with a small or runt V. noveboracensis; that species grows in moist places, and the leaves are not pale below. 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
USACE-agcp
USACE-emp
County Map - click on a county to view source of record.
Photo Gallery
photographercommentsphoto_linkcountyobsType
B.A. SorriePiedmont, Iredell soil area SW of Carbonton, July 2018. MoorePhoto_natural
Select a source
AllHerbaria
Individual
Website
Select an occurrence type
AllCollection_naturalLiterature_naturalPhoto_natural