Rhodolaena humblotii Baill.

Schatz, George E., Lowry Ii, Porter P. & Wolf, Anne-Elizabeth, 2000, Endemic families of Madagascar. VI. A synoptic revision of Rhodolaena (Sarcolaenaceae), Adansonia (3) 22 (2), pp. 239-252 : 246-247

5. Rhodolaena humblotii Baill.

Bull. Mens. Soc. Linn. Paris 1: 566 (1886).

— Lectotype (here designated): Humblot 474, Madagascar, Antsianaka ( P!; iso-, K!, P!)

Rhodolaena humblotii is a medium-sized tree that occurs in low to mid-elevation humid to subhumid forest from Ifanadiana to Fampanambo NW of Maroantsetra ( Fig. 4 ). It can usually be recognized easily by its twigs with dense, long, golden indument, and generally persistent, linear to narrowly triangular stipules. Rhodolaena humblotii has recently been collected at several localities, including Betampona RNI, Zahamena PN/RNI, the upper Rantabe watershed in the Bay of Antongil area, and at Fampanambo near Maroantsetra.

When BAILLON (1886a) described R. humblotii , he cited two collections (Humblot 428 and 474), the latter of which is in better condition and has therefore been selected as the lectotype.

VERNACULAR NAMES.— Arinala, Hazomafana, Fotona, Malemisisika, Vandroazana, Voandrozana.

MATERIAL EXAMINED. — Andrianjafy 68, Beanana , 88, Betampona RNI , 102, Zahamena RNI ; Cours 1844 (= Herb. Inst. Sci. Madag. 1844), Ambodivoangy , 2392, Sahalampy, 2429 (= Herb. Inst. Sci. Madag. 2429 and Herb. St. Agric. Alaotra 2429), Sahalampy à Ampitanonoka ; Guillaumet 2420, Antanambao-Manampotsy ; Herb. Inst. Sci. Madag. 3723, Zahamena RNI ; Homolle 1844, without precise locality; Humblot s.n., without precise locality, 428, 474, Antsianaka ; Iambana 146, Betampona RNI ; Jacquemin 226, Fotsialanana à Mitanonoka ; Malcomber 2513, Zahamena RNI ; Nicoll 501, Manambato ; Pierre s.n., without precise locality; Rakotozafy 677, Fotsialanana-Ampitanonoka ; Ratovoson 92, Fampanambo ; Réserves Naturelles 3723, Zahamena RNI , 7414, Betampona RNI , 7834, Zahamena RNI , 8749, Betampona RNI , 10508, 12442, Zahamena RNI ; Service Forestier 4484, Sahamazaka , 9060, Beanana , 9109, Sahajinja-Sahamalaza , 17558, Betampona RNI , 21420, Tsinjoarivo , 23229, Ifanadiana , 31934, Verezanantsoro, Mananara-Nord PN.

Figures

Fig. 4. — Distributions of Rhodolaena, mapped on the bioclimatic zones of Madagascar (after CORNET 1974; see SCHATZ 2000). R. humblotii (•), R. macrocarpa (*).