Valiha and Cathariostachys, Two New Bamboo Genera (Gramineae-Bambusoideae) from Madagascar

Summary. Two new bamboo genera, Valiha and Cathariostachys, are described from Madagascar. Valiha consists of two species: V diffusa S. Dransf. and V perrieri (A. Camus) S. Dransf., the latter transferred from Ochlandra. Cathariostachys comprises two species: C. capitata (Kunth) S. Dransf., transferred from Nastus, and C. madagascariensis (A. Camus) S. Dransf., transferred from Cephalostachyum. Their affinities with other genera are discussed.