Physostegia virginiana subsp. praemorsa (Shinners) P.D.Cantino, 1982 6% complete

No common name

Cantino PD (1982) A MONOGRAPH OF THE GENUS PHYSOSTEGIA (LABIATAE). Contributions From The Gray Herbarium of Harvard University 211: 1-105. Retrieved from http://www.jstor.org/stable/41764739