Monographs Details: Pentaspatella ramosa Gleason
Authority: Maguire, Bassett & Wurdack, John J. 1961. The botany of the Guayana Highland--part IV (2). Mem. New York Bot. Gard. 10: 1-87.
Family:Ochnaceae
Discussion:

Sauvagesia duckei Sleumer, Repert. Sp. Nov. 42: 263. 1937.

Dwyer (in Fordham University library, thesis) had proposed the transfer of P. ramosa to Leitgebia; both L. guianensis and P. ramosa have the same small inner staminodia and placentae limited to the ovary base. W e feel however that the vast habital difference warrants the generic retention of Pentaspatella; it probably represents a distinct divergence from Sauvagesia, with the final floral reduction the same as in Leitgebia. W e have examined Venezuelan material of Pentaspatella from the Yapacana savannas and Esmeralda Sabana Grande, as well as both topotypic (Ducke 999) and isotypic (Ducke H.J.B.R. 30124, US) material of S. duckei and have noted no differences between the Venezuelan and Brazilian collections. Dwyer's placentation character for Sauvagesia is certainly valid within the limits of our generic sampling; S. erecta L., S. imthurniana (Oliver) Dwyer, S. sprengelii St.-Hil., S. nudicaulis Maguire & Wurdack, and S. smithiana Dwyer all have distinct ovary wall placentae.