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.)
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[…] from the Slopes, where it was blooming at the end of July. (The other two pictures are here and here.) The color is variable from purple through white, but this purplish pink is by far the most […]