Notes on the genus Ochna L. (Ochnaceae) in Madagascar Author Callmander, Martin, W. Missouri BotanicalGarden, P. O. Box 299, St. Louis, Missouri, 63166 - 0299, U. S. A. and Conservatoire etJardin botaniques de la Ville de Genève, ch. de l’Impératrice 1, case postale 60, 1292 Chambésy, Genève. Switzerland. martin.callmander@mobot.org Author Phillipson, Peter B. Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri, 63166 - 0299, U. S. A. and Muséum national d’Histoire naturelle, Département Systématique et Evolution, UMR 7205 OSEB, case postale 39, rue Cuvier 57, 75231 Paris, cedex 05, France text Candollea 2012 2012-07-01 67 1 142 144 journal article 3270 10.15553/c2012v671a14 012626c5-792b-45f3-b7e6-16ec61420de8 2235-3658 5789051 Ochna thouvenotii (H. Perrier) Callm. & Phillipson , comb. nova Ξ Discladium thouvenotii H. Perrier in Not. Syst. (Paris) 10: 26. 1941 . Typus: MADAGASCAR : Analamazaotra , s.d., Thouvenot 66 ( holo- : P [ P00391402 ]!; iso-:K!, P[P00391403] !). Observations. – Ochna thouvenotii appears to be confined to the eastern escarpment around Moramanga and to near Foulpointe on the East Coast. Differences between this species and O. louvelii which also occurs around Moramanga are described above under the latter species. Ochna thouvenotii differs from O.polycarpa ,which isalso found on the easternescarpment, by itslarger leaves ( 3-4.5 cm × 1-2.5 cm vs. 1.5-3cm × 0.7- 1.5 cm ) and flowers with sepals at anthesis> 1.5 cm in length (vs. ca. 1 cmin O . polycarpa ).