Abstract
A new species of Rhaphiostylis, R. minima sp. nov. from Liberia and Ivory Coast, is described and illustrated here. It is characterised by its comparatively small size, an ovate to lanceolate leaf blade with long drip tip and a partly glabrous ovary that is in shape in between those of R. elegans Engl. and R. preussii Engl. Rhaphiostylis elegans is lectotypified and illustrated here.
Highlights
Rhaphiostylis is an Icacinaceae genus of ca. 10 liana species endemic to tropical Africa (Boutique 1960, Villiers 1973a, 1973b)
4 species were known from the Upper Guinean flora subregion where the new species was discovered, R. beninensis (Hook.f. ex Planch.) Planch. ex Benth., R. cordifolia Hutch. & Dalziel, R. ferruginea Engl. and R. preussii Engl. (Hepper 1958: 638; Hawthorne & Jongkind 2006: 346)
Rhaphiostylis preussii is the only other Rhaphiostylis with glabrous leaves often found in the undergrowth in that forest area
Summary
Rhaphiostylis is an Icacinaceae genus of ca. 10 liana species endemic to tropical Africa (Boutique 1960, Villiers 1973a, 1973b). Rhaphiostylis minima Jongkind (Icacinaceae), a new liana species from Ivory Coast & Liberia. In 2013 a small Rhaphiostylis climber with glabrous leaves and branches was found flowering and fruiting in the evergreen forest in the south-east of Liberia. In Rhaphiostylis the leaf shape and the indumentum of the ovary are important characters for identification of the species (Hepper 1958).
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