Uapaca ambanjensis Leandri

Mcpherson, Gordon, 2011, A review of Madagascan Uapaca (Euphorbiaceae s. l.), Adansonia (3) 33 (2), pp. 221-231 : 223-224

publication ID 10.5252/a2011n2a7

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Uapaca ambanjensis Leandri


1. Uapaca ambanjensis Leandri View in CoL

Mémoires de l’Institut scientifique de Madagascar, Série B, Biologie végétale 8: 256 (1957).

TYPUS. — Madagascar. Prov. Antsiranana, Andampy, près d’Ambanja , 100-200 m, 17.IX.1954, fr., Service forestier 10674 (lecto-, P [sheet P00132895 ], here designated; isolecto-, MO) .

MATERIAL EXAMINED. — Madagascar. Prov. Antsiranana, Lokobe RN, 13°24’40”S, 048°19’07”E, 20-200 m, 20.IV.1994, Antilahimena 86 ( MO, P, TAN) GoogleMaps . — Eod. loc., 5 km SE of Hell Ville , 13°25’S, 048°18’E, 150 m, 28. I.1992, Birkinshaw 102 ( MO, P) GoogleMaps . — Eod. loc., 200 m, 25.II.1992, Birkinshaw 119 ( MO, P, TAN) . — Manongarivo, 14°04’S, 048°17’E, 300 m, 5.IX.1997, Gautier et al. 3248 ( MO, P) GoogleMaps . — Ampondrabe, 13°33’S, 048°33’E, 300 m, 3.X.1952, Service forestier 5839 ( P) GoogleMaps . — Andranomatavy-Ambanja, 13°57’30”S, 047°58’30”E, 668 m, 11.X.1953, Service forestier 7691 ( MO, P) GoogleMaps . — Andampy, 14°06’10”S, 048°15’30”, 100-200 m, 17.IX.1954, Service forestier 10674 ( MO, P) .


Tree 8-25 m; stilt roots usually present but occasionally absent; leaf-bearing twigs 2.5-6(-10) mm

in diameter, solid. Leaf blades narrowly oblong or narrowly obovate to obovate, (4-) 10-20 cm long, (1.5-) 2.5-8.5 cm wide, base cuneate to attenuate, apex obtuse, secondary veins 6-8 on each side of the midrib, readily visible, tertiary veins subscalariform, visible; petioles (0.5-)1.0-2.7(-4.0) cm long. Staminate peduncles 2.5-4.5 cm long; petaloid bracts (few seen) 4-10 in number, 10-14 mm long, 6-8 mm wide, the inner ones sometimes short-pubescent; head of flowers 10-12 mm in diameter excluding the exserted stamens; staminodes typically present, pistillode glabrous to sparsely pubescent on the exposed distal surface. Pistillate peduncles 1.1-4.5 cm long; petaloid bracts (few seen) 4-7 in number, 7-10 mm long, c. 6 mm wide, calyx c. 5.5 mm in diameter in flower, glabrous abaxially, in fruit 2-3 mm high, 6-8(-10) mm in diameter, entire or somewhat lobed and often undulate, often pubescent within at junction with axis; ovary glabrous, fruit 2.5-3.0 cm long, 2.2-2.5 cm in diameter, glabrous, yellow, apex pointed or rounded.


Northwestern Madagascar at elevations of 20- 700 m.


Distinguished by its relatively narrow and nonlustrous leaves with subscalariform tertiary venation, its large glabrous pistillate calyx that is often pubescent within at its junction with the floral axis, and its glabrous ovary. The leaves of this species most closely resemble those of U. littoralis , but that species does not exhibit subscalariform venation.


Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants


Missouri Botanical Garden


Parc de Tsimbazaza


"Alexandru Ioan Cuza" University

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