''Perrierosedum'' is a genus of succulent plants of the family

Crassulaceae The Crassulaceae (from Latin ''crassus'', thick), also known as the stonecrop family or the orpine family, are a diverse family of dicotyledon flowering plants characterized by succulent leaves and a unique form of photosynthesis, known as Crass ...

that is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...

and contains only the single species ''Perrierosedum madagascariense''. The genus name of ''Perrierosedum'' is in honour of

Joseph Marie Henry Alfred Perrier de la Bâthie Joseph Marie Henry Alfred Perrier de la Bâthie (11 August 1873 – 2 October 1958) was a French botanist who specialized in the plants of Madagascar. He is the nephew of Eugène Pierre Perrier de la Bâthie, (1825-1916), another botanist, who al ...

(1873–1958), a French botanist who specialized in the plants of Madagascar. It was first described and published in J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. Vol.12 on page 166 in 1978.

References

Crassulaceae Monotypic Saxifragales genera Crassulaceae genera Taxa named by Alwin Berger Plants described in 1978 Endemic flora of Madagascar {{Crassulaceae-stub