Subspecies, varieties, forms and cultivars of plants belonging to the Pachypodium rosulatum group

• Pachypodium rosulatum Baker: has a bottle-shaped trunk with stout heavily thorned stems. Leaves broad. Flowers vivid yellow in clusters on long peduncles, corolla tube cylindrical, to 15 mm long. Distribution: central plateau of Madagascar.
• Pachypodium rosulatum subs. bemarahense Lüthy & Lavranos
• Pachypodium rosulatum subs. bicolor (Lavranos & Rapan.) Lüthy: up to 40 cm tall and 50 cm in diameter. Leaves glabrous. Corolla yellow with a white ring around the tube. Distribution: Tsiribihina river, Madagascar.
• Pachypodium rosulatum subs. cactipes (K.Schum.) Lüthy: has rich green glossy foliage, showy yellow flowers. Distribution: It is the southerly form of the Pachypodium rosulatum complex.
• Pachypodium rosulatum f. cristata hort.
• Pachypodium rosulatum var. delphinense H.Perrier
• Pachypodium rosulatum var. drakei (Costantin & Bois) Markgr.
• Pachypodium rosulatum subs. gracilius (H.Perrier) Lüthy: is a smaller form to 40 cm in diameter with fewer and slimmer branches and narrower red-brown spines. Leaves narrow. Distribution: Madagascar on Isalo mountains .
• Pachypodium rosulatum subs. gracilius f. cristatum
• Pachypodium rosulatum var. inopinatum (Lavranos) G.D.Rowley: has caudexes up to 35 cm in diameter. Spines acicular. Leaves narrowly ovate. Peduncle long with 2-5 flowers. Corolla ivory with a tube 10-12 mm long. Distribution: Madagascar.
• Pachypodium rosulatum subs. makayense (Lavranos) Lüthy: has a large shining yellow flower with a white ring around the tube. Distribution: massif of Makay, Tulear province, Madagascar.
• Pachypodium rosulatum var. stenanthum Costantin & Bois