BioStor
 | The Enumeratio and Selectarum of Nicolaus Von Jacquin R A Howard (1973) Journal of the Arnold Arboretum 54: 435-470 |
 | New species and combinations of Catostemma and Pachira (Bombacaceae) from the Venezuelan Guayana William (Bill) Surprison Alverson (1994) Novon 4: 3-8 |