BioStor
 | Notes on the Piperaceae of the Lesser Antilles R A Howard (1973) Journal of the Arnold Arboretum 54: 377-411 |
 | An annotated catalogue of type specimens in the University of Illinois herbarium (ILL) -- 1. Piperaceae, except Peperomia A G Jones (1985) Phytologia 58: 1-102 |