-
Psychotria ulviformis Steyerm.
-
Steyermark, J. A. 1995. Flora of the Venezuelan Guayana Project.
-
Steyermark, J. A. 1972. Rubiaceae. 23: 227–832. In B. Maguire & Collaborators (eds.) Bot. Guyana Highl.—Part IX. Mem. New York Bot. Gard.. New York Botanical Garden Press, Bronx.
-
Taylor, C. M. 2010-2020. Studies in Tropical Rubiaceae.
-
Funk, V. A., T. H. Hollowell, P. E. Berry, C. L. Kelloff & S. Alexander. 2007. Checklist of the plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Contr. U.S. Natl. Herb. 55: 1–584.
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