Piqueria trinervia Cav. [ Ageratum febrifugum Sessé & Moc.]
no HD illustration available (m1)
Piqueria trinervia Cav. [Compositae]
M. Sessé, M. Mociño, Draw. Roy. Exped. New Spain: [Hunt instutute, Turner collection no. 0013] (1787-1803)