R.E.Schult. 1950 - Schultes RE (1950) PLANTAE AUSTRO-AMERICANAE VI: PLANTARUM PRINCIPALITER VALLIS AMAZONIAE NOVARUM VEL MINUS COGNITARUM NOTAE DIVERSAE. Botanical Museum Leaflets, Harvard University 14: 109-136. Retrieved from http://www.jstor.org/stable/41762121
There is no corrections for Herrania nitida f. sphenophylla yet.