A revision of the genus Alectra Thunberg (Scrophulariaceae) in Madagascar, with a description of Pseudomelasma, gen. nov

Eberhard FISCHER

en Bulletin du Muséum national d'Histoire naturelle, 4ème série – section B, Adansonia : Botanique, Phytochimie 18 (1-2) - Pages 45-65

Published on 19 July 1996

The pantropical genus Alectra Thunberg comprises about 30 species. A revision of the Malagasy taxa is provided, in which five species are recognized, four of which are described as new: A. hildebrandtii, A. humbertii, A. ibityensis and A. fruticosa. The endemic Alectra pedicularioides Baker is recognized as a new endemic genus, Pseudomelasma, which differs from Alectra by its long pedicel and its calyx which enlarges in fruit; from Melasma by its persistent corolla; and from both genera by its proliferating inflorescence and its seed shape. A key to the Malagasy species is provided along with descriptions, illustrations and distributional data.