Pterocaulon pycnostachyum (Michx.) Elliott
no HD illustration available (m1)
Pterocaulon pycnostachyum (Michx.) Elliott [ Conyza pycnostachya Michx.] [Compositae]
A. Lounsberry, E. Rowan, Southern wild flowers and trees: p. 506, t. 168 (1901) [E. Rowan]