Notes on the flora of Madagascar, 26 Author Callmander, Martin W. Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri, 63166 - 0299, U. S. A & Conservatoire et Jardin botaniques de la Ville de Genève, CP 60, CH- 1292 Chambésy. Switzerland. martin.callmander@mobot.org Author Phillipson, Peter B. Missouri Botanical Garden, P. O. Box 299, St. Louis, Missouri, 63166 - 0299, U. S. A. & Muséum national d’Histoire naturelle, Département Systématique et Evolution, UMR 7205, OSEB, case postale 39, rue Cuvier 57, 75231 Paris, cedex 05, France. peter.phillipson@mobot.org Author Gautier, Laurent Conservatoireet Jardinbotaniques de laVillede Genève & Universitéde Genève, Laboratoirede botanique systématique et biodiversité, CP 60, CH- 1292 Chambésy. Switzerland. laurent.gautier@ville-ge.ch text Candollea 2012 2012-12-01 67 2 369 372 journal article 3443 10.15553/c2012v672a17 d10065ab-7097-4e15-adb5-26dc279e18da 2235-3658 5710384 Rotheca nudiflora (Moldenke) Callm. & Phillipson , comb. nova. ÷ Clerodendrum nudiflorum Moldenke in Phytologia 3: 407. 1951. Typus: MADAGASCAR . Prov. Antsiranana : Sambirano , 8.VI.1908 , fl., Perrier de laBâthie 10221 ( holo- : P [ P004 46663 ]!). = Clerodendrum nudiflorum var. puberulentum Moldenke in Phytologia 3: 409. 1951. Typus : MADAGASCAR . Prov. Toliara : env. d’Ampandrandava, entre Bekily et Tsivory , [ 24°05’S 45°42’E ], 700-1000 m , IX-X.1942 , fl., Seyrig 91 (holo-: P [ P00446664 ]!). Observations . – Rotheca nudiflora is the third species of the genus recognized for Madagascar and it is only one that is endemic. It can be easily recognized among other species of Rotheca by its phenology: it is the only Malagasy species that flowers early in the season before the leaves develop ( Fig. 1 ). MOLDENKE (1951) recognized two varieties within Clerodendrum nudiflorum , segregating a single collection Seyrig 91 , from southern Madagascar , as C. nudiflorum var. puberulentum on the basis of its puberulent rachis, peduncle, pedicels and calyx. Our critical review of all specimens available at G, K, MO, P and TAN has suggested that infraspecific taxa cannot be recognised in Rotheca nudiflora , since there appears to be a variable degree of pubescence throughout its range in the dry forests and thickets of Madagascar . Besides, generally glabrous individuals often appear to have some pubescence in early stages of development. Conservation status . – With an extent of occurrence (EOO) of> 470,000 km 2 , an area of occupancy (AOO) of 216 km 2 and> 20 subpopulations, several encompassed in formally protected areas (Andohahela, Ankarana, Bemaraha, Beza Mahafaly, Namoroka), R. nudiflora is assigned a preliminary status of Least Concern (LC) following the IUCN Red List Categories and Criteria (calculation following CALLMANDER & al., 2007 ).