Zinnia marylandica (Asteraceae: Heliantheae), a new disease-resistant ornamental hybrid
- Published 2008 in Brittonia
Abstract
Zinnia marylandica, an artificial hybrid betweenZ. angustifolia var.angustifolia (2n=22 female) andZ. violacea (2n=24, male), is described and illustrated.Zinnia marylandica is a stabilized amphiploid (2n=46) produced by colchicine-induced doubling of the sterile interspecific hybrids. It exhibits disease resistance to powdery mildew (Erysiphe cichoracearum… (More)
