Wild Flowers of Pittsburgh

Spotted Knapweed (Centaurea maculosa)


A close relative of the garden Bachelor’s Button (Centaurea cyanus), this is a European import found especially along railroad tracks; this one was by a disused siding in Oakmont. The color is variable from purple through white.

From Gray’s Manual: C. MACULOSA Lam. Pubescent or glabrate, with ascending rather wiry branches; involucre ovoid-cainpanulate, in fruit becoming open-campanulate; the outer and middle ovate bracts with rather firm points and with 5-7 pairs of cilia at the dark tip; innermost bracts elongate, entire or lacerate; corollas whitish, rose-pink, or purplish, the marginal falsely radiate. Waste places, roadsides, etc., N. E. to N. J.
(Adv. from Eu.)


One response

  1. Pingback: Spotted Knapweed (Centaurea maculosa) « Flora Pittsburghensis

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 )

Twitter picture

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

Facebook photo

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

Google+ photo

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

Connecting to %s