Memoirs of The New York Botanical Garden
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of Vascular Plants of Northeastern United States and adjacent Canada
Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Haploclathra is a small genus consisting of several forest species which seem to be confined to the middle Amazon Basin near and above Manaus. This small assemblage is being studied by us in some detail at this time.