(syn: Dahlia imperialis Double Purple) Thanks to customer Larry Depuy for sharing this wonderful lavender double-flowered form of the giant tree dahlia. We eventually tracked these back to the late California plantsman extraordinaire Wayne Roderick, who introduced a plethora of great garden plants. Since it had no valid cultivar name, we have given it one. The 9' bamboo-like stalks are topped in late October with sprays of 3" anemone-like, lavender double flowers...very spectacular and attractive to hummingbirds if you can hold off the frosts long enough to enjoy the flowers. If not, the stalks are a great structural element in the garden anyway.