Erigeron strigosus (weed)
From Pestinfo-Wiki

Erigeron strigosus (click on image to enlarge it)
Author(s): Jason Hollinger
Source: Wikimedia Commons
Author(s): Jason Hollinger
Source: Wikimedia Commons
Erigeron strigosus (weed) Muhl. ex Willd. - (rough fleabane)
This species is native to North America and has been introduced as an ornamental into Europe and parts of Asia. It can be invasive.
Publications covering Erigeron strigosus (weed)
Plant Disease (2012) 96, p. 1827 (Park et al.)
J.H. Park, K.S. Han, S.H. Hong and H.D. Shin (2012)
First report of leaf spot caused by Septoria erigerontis on Erigeron strigosus in Korea
Weed Science (2006) 54, 1094-1100
Richard G. Smith and Katherine L. Gross (2006)
Rapid change in the germinable fraction of the weed seed bank in crop rotations