Protologue, "Type in the U.S. National Herbarium, nos. 678781 (flowers), 679149 (fruit), and 676760 (autumnal leaves), collected on a hill near Gamboa, Canal Zone, Panama, from a single tree, in flower, June 25, 1911, in fruit, July 23, 199, by H. Pittier (nos. 3713, 4058, and 2603)."