This member of the Vitaceae family was described by Bernard M. Descoings in 1962. It is found on Madagascar, growing in a well drained soil with some water and lots of sun. The caudex can grow up to 30 centimetres or more in diameter, the vines will reach for 1,5 metres. The flowers are greenish yellow.
The genera name from the Greek kyphos; 'tumor' or,'hump' and stemma; 'garland' or 'crown'. The species name after the area it was found in: Montagnac - named after the French town. A slimmer form, also from Laurette E.U.R.L.

