Fuchsia Sw. Prodr. Veg. Ind. Occ. 62. 1788, not Fuchsia L. 1753.
Urceolaria Willd. in Cothenius, Dispos. Veg. 10. 1790, hyponym; J. F. Gmel. Syst. Nat. 2: 390. 1791.
Uncariopsis Karst. Linnaea 30: 152. 1859.
This genus is one of the nomina generica conservanda (See Appendix III. p. 312, International Code of Botanical Nomenclature. 1961. Utrecht, Netherlands; also see Taxon 9(4) : 118. Apr-May. 1960), and is maintained as such in the present treatment.
At the time Standley published Schradera surinamensis in 1948 (Bull. Torrey Club 75: 569), he noted that "Until recently few specimens of Schradera have been collected in South America, but those now coming to hand in greater numbers indicate that the genus is represented there by a rather large number of only slightly different but apparently well-marked species."
A study of recent collections from South America since 1948, especially from the Guayana Highlands and from the Pacific Coast of Colombia, reveals an even greater number of undescribed taxa than was originally suspected. The first of these, S. nilssonii Steyermark, was published in 1962 (Bol. Soc. Ven. Cien. Nat. 23(101) : 83), and the remainder are presented in the present paper. Continued exploration of the South American countries will doubtless augment to an even greater extent the total number of distinct taxa.
The results of the present study are based upon material of the genus existing in the herbaria of the Chicago Natural History Museum, The New York Botanical Garden, and the United States National Museum.