Physostegia virginiana (L.) Benth. [ Dracocephalum denticulatum Aiton]
no HD illustration available (m1)
Physostegia virginiana (L.) Benth. [ Physostegia virginiana (L.) Benth.] [Labiatae]
C.L. Loddiges, Bot. Cab., vol. 14 : t. 1400 (1827) [unsigned]