Marin-Loalza, JC; Ernst, L; Beuerle, T; Theuring, C; Cespedes, CL; Hartmann, T
(2008)
The endemic Mexican genus Pittocaulon (subtribe Tussilagininae, tribe Senecioneae, Asteraceae) belongs to a monophyletic group of genera distributed in Mexico and North America. The five Pittocaulon species represent shrubs ...