Lugar de publicación
Contr. Gray Herb. 85: 171 (1929)
Referencias
-
Johnston (1929a)
Johnston, I.M. 1929. Papers on the Flora of Northern Chile. Contributions from the Gray Herbarium of Harvard University 85: 1-172
Polyachyrus rigidus
Polyachyrus carduoides
Phil.
Contr. Gray Herb. 85: 171 (1929)
Johnston, I.M. 1929. Papers on the Flora of Northern Chile. Contributions from the Gray Herbarium of Harvard University 85: 1-172