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| Bull. Mus. natl. Hist. nat., sect. B, Adansonia 16: 227 (1995). | |||
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| Mimosaceae (Leguminosae - Mimosoideae) | |||
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| Adenanthera mantaroa is endemic to Madagascar, where it occurs in the northern and eastern parts. | |||
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| The wood is used locally for construction and canoes. | |||
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| Medium-sized to fairly large tree up to 30 m tall; bole straight, up to 100 cm in diameter; bark scaly, reddish brown; young branches sparsely pubescent. Leaves alternate, bipinnately compound with (3–)4–6 pairs of pinnae, these alternate to opposite; stipules triangular, c. 2 mm long, caducous; petiole (2.5–)4–9 cm long, rachis (4–)6–22 cm long, grooved and slightly pubescent above; leaflets 11–15 per pinna, alternate, shortly stalked, oblong to broadly elliptical, up to 3 cm × 1.5 cm, rounded at base and apex, almost glabrous. Inflorescence an axillary raceme (5–)10–20 cm long, many-flowered. Flowers bisexual, regular, 5-merous, yellow; pedicel 2–4 mm long, with joint near base; calyx shortly obconical, 1.5–2 mm long, glabrous, with short lobes; petals free, elliptical, 3–4 mm long, reflexed; stamens 10, free, anthers with a stalked gland at apex; ovary superior, shortly stalked, narrowly oblong, glabrous, style c. 3.5 mm long. Fruit a narrowly oblong to linear and sickle-shaped pod (10–)20–30 cm × 1.5 cm, flattened, stalked, with thickened margins, glabrous, yellowish, silky, dehiscent with 2 valves, up to 15-seeded. Seeds flattened ellipsoid, 8–11 mm × 6–8 mm, black in the lower part and red-orange in the upper part. Adenanthera comprises about 12 species, which are all indigenous to tropical Asia and northern Australia, except Adenanthera mantaroa. Two species are occasionally planted as an ornamental and roadside tree in tropical Africa: Adenanthera microsperma Teijsm. & Binn. and Adenanthera pavonina L. The latter species occurs occasionally naturalized in Madagascar; it differs in its leaflets that are pubescent below and in its completely red mature seeds. | |||
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| Adenanthera mantaroa occurs in evergreen forest up to 1100 m altitude. It is found on lateritic soils. | |||
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| In general Adenanthera mantaroa is uncommon, but it is locally abundant, e.g. around the Bay of Antongil. | |||
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| Very little is known about this recently described species. In view of its scattered occurrence and restricted distribution, harvesting the timber from wild stands should be discouraged. Planting experiments may clarify the possibilities as a plantation timber. The wood properties should be investigated and might be good, as is the case with several Asiatic Adenanthera species. | |||
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| • du Puy, D.J., Labat, J.N., Rabevohitra, R., Villiers, J.-F., Bosser, J. & Moat, J., 2002. The Leguminosae of Madagascar. Royal Botanic Gardens, Kew, Richmond, United Kingdom. 750 pp. | |||
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| • Villiers, J.-F., 1995. Une nouvelle espèce du genre Adenanthera L. (Leguminosae, Mimosoideae) à Madagascar. Bulletin du Muséum National d’Histoire Naturelle, 4e série, 16, section B, Adansonia ( 2–4): 227–230.`. | |||
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| Lemmens, R.H.M.J., 2006. Adenanthera mantaroaVilliers. [Internet] Record from PROTA4U. Louppe, D., Oteng-Amoako, A.A. & Brink, M. (Editors). PROTA (Plant Resources of Tropical Africa / Ressources végétales de l’Afrique tropicale), Wageningen, Netherlands. <http://www.prota4u.org/search.asp>. Accessed . | |||
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