Sigmatostalix racemifera L.O. Williams, Ann. Missouri Bot. Gard. 27(3): 285-286, t. 36. 1940.
TYPE: Panama. Coclé: vicinity of El Valle, 600-100 m alt., flowers yellow, 8 Dec 1938, P.H. Allen 1232 (holotype, MO; illustration of type).
ILLUSTRATIONS