Croton farinosus Lam., Encycl. 2: 211. 1786

Berry, Paul E., Kainulainen, Kent & Ee, Benjamin W. van, 2017, A Nomenclator of Croton (Euphorbiaceae) in Madagascar, the Comoros Archipelago, and the Mascarene Islands, PhytoKeys 90, pp. 1-87 : 31-32

54. Croton farinosus Lam., Encycl. 2: 211. 1786

Oxydectes farinosa (Lam.) Kuntze, Revis. Gen. Pl. 2: 611. 1891. Type. Based on Croton farinosus Lam.

Croton scottii Baill., Bull. Mens. Soc. Linn. Paris 2: 967. 1891, as ' scotti ', syn. nov. Type. Madagascar. Prov. Toliara: Fort-Dauphin, s.d., G.F. Scott-Elliot 2987 (holotype: P [P00154436]!; isotype: K [K000253644]!).

Croton moraharivensis Leandri, Ann. Mus. Colon. Marseille, sér. 5, 7(1): 68. 1939, syn. nov. Type. Madagascar. Prov. Toliara: vallée de la Manambolo, rive droite (bassin du Mandrare) aux environs d’Isomono (confluent de la Sakamalio), Mont Morahariva, 1000-1400 m, Dec 1933, H. Humbert 13176 (lectotype, designated here: P [P00132989]!; isolectotypes: G [G00018151]!, P [P00132990]!). Madagascar. Prov. Toliara: bassin de réception de la Mananara, affluent du Mandrare, pentes occidentales des montagnes entre l’Andohahela et l’Elakelaka, 600-800m, Feb 1934, H. Humbert 14041 (syntypes: K [K000815882]!, P [P00132991]!).

Croton vohibariensis Leandri, Ann. Mus. Colon. Marseille, sér. 5, 7(1): 78. 1939, syn. nov. Type. Madagascar. Prov. Toliara: vallée moyenne du Mandrare, près d’Anadabolava, Mont Vohibaria (sommet), 800-810 m, Dec 1933, H. Humbert 12627 (lectotype, designated here: P [P00133322]!; isolectotypes: G [G00446404]!, K [K000253645]!, P [P00133323]!, P [P00133324]!). Madagascar. Prov. Toliara: vallée moyenne du Mandrare, près d’Anadabolava, Mont Vohitrotsy, sommet, vers 850 m, Dec 1933, H. Humbert 12673 (syntype: P [P00133325]!).

Type.

Madagascar: sin. loc., s.d., P. Commerson s.n. (holotype: P-LA [P00382067]!; isotypes: G [G00446383]!, G [G00446384]!, LINN [LINN-HS1492-5], P [P00404490]!) .

Habit and distribution.

Shrubs; southeastern Madagascar (Toliara).

Notes.

Although there is a wide elevational variation in this species as here circumscribed, the three names listed in synonymy share the characteristic glaucous-farinose lower leaf surface, and all appear to have an affinity for igneous outcroppings.