Solidago canadensis L. (Asteraceae)
http://www.jstor.org/discover/10.2307/4033045?uid=3737864&uid=2129&uid=2&uid=70&uid=4&sid=21101131405591
http://www.floraweb.de/neoflora/handbuch/solidagocanadensis.html
http://en.wikipedia.org/wiki/Solidago_canadensis
http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8339.1997.tb01413.x/abstract
Aug-12-2012 Nikon D70
