Wild Flowers of Pittsburgh

Late Thoroughwort (Eupatorium serotinum)


We wind up the thoroughwort season with this late entry, whose dusty off-white puffs of raggedy flowers decorate roadsides and railroad rights-of-way in September and October. A close view reveals the inividual flowers that make up each head. This specimen grew through a crack in a disused parking lot in Oakmont.

From Gray’s Manual of Botany: Eupatorium serotinum Michx. Stem pulverulent-pubescent, bushy-branched, 1-2 m. high ; leaves ovate-lanceolate, tapering to a point, triple-nerved and veiny, coarsely serrate, 0.5-1.5 dm. long ; involucre very pubescent. Alluvial ground, Md. to Minn., e. Kan., and south w.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s