Purple stems and green, toothed leaves of symphyotrichum chilense, Sisters Rocks State Park, Oregon; Southwest USA wildflowers
Smooth Aster (Symphyotrichum laeve)
Symphyotrichum Lateriflorum: Most Up-to-Date Encyclopedia, News & Reviews
Symphyotrichum oblongifolium (Aromatic Aster)
Symphyotrichum chilense – CNPS El Dorado Chapter
Purple-stemmed Aster (Symphyotrichum puniceum)
Symphyotrichum chilense – The Watershed Nursery
Symphyotrichum chilense - Xera Plants
Symphyotrichum kentuckiense - Wikipedia
August, 2009
Wildflowers of Western Pennsylvania - LATE PURPLE ASTER: (Symphyotrichum patens, formerly Aster patens). This is one of the more common of the native, perennial, blue or purple-colored asters, but can be tricky
Aster symphyotrichum hi-res stock photography and images - Alamy
Aster novae-angliae 'Purple Cloud' (New England Aster)
Symphyotrichum chilense 'Short Sands Purple' - Xera Plants