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Alnus acuminata : ウィキペディア英語版 | Alnus acuminata
''Alnus acuminata'' (also called Alder) is a species of tree in the Betulaceae family. It is found in Argentina, Bolivia, Colombia, Central America, Mexico, Peru and Venezuela.〔Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.〕〔Berendsohn, W.G., A. K. Gruber & J. A. Monterrosa Salomón. 2009. Nova silva cuscatlanica. Árboles nativos e introducidos de El Salvador. Parte 1: Angiospermae - Familias A a L. Englera 29(1): 1–438.〕〔CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City〕〔Furlow, J. J. 1977. Family 49, Betulaceae. In Burger, W. (Ed.), Flora Costaricensis. Fieldiana, Bot. 40: 56–58.〕〔Idárraga-Piedrahita, A., R. D. C. Ortiz, R. Callejas Posada & M. Merello. (eds.) 2011. Flora de Antioquia: Catálogo de las Plantas Vasculares 2: 9–939. Universidad de Antioquia, Medellín〕〔López Vargas, A. 1995. Estudio de Vegetación de las Partes Sud y Sudoeste de las Provincias Mizque y Campero --- Cochabamba, i–vi, 1–152. Tesis Universidad Mayor de San Simón, Cochabamba〕〔Vargas Caballero, I. G., A. Lawrence & M. Eid. 2000. Árboles y arbustos para sistemas agroforestales en los Valles Interandinos de Santa Cruz 1–145. Fundación Amigos de la Naturaleza, Santa Cruz〕〔Zuloaga, F. O., O. N. Morrone, M. J. Belgrano, C. Marticorena & E. Marchesi. (eds.) 2008. Catálogo de las plantas vasculares del Cono Sur. Monographs in systematic botany from the Missouri Botanical Garden 107(1–3): i–xcvi, 1–3348.〕 There are three subspecies; ''Alnus acuminata'' subsp. ''acuminata'' occurs from Colombia and Venezuela south to northern Argentina; ''Alnus acuminata'' subsp. ''arguta'' (Schltdl.) Furlow occurs from northwestern Mexico south to Panama; and ''Alnus acuminata'' subsp. ''glabrata'' (Fernald) Furlow occurs in central and southern Mexico.〔(Kew World Checklist of Selected Plant Families )〕 ==Description== ''Alnus acuminata'' is a small tree up to tall with a straight trunk up to thick. The bark has many yellowish lenticels. The leaves are simple, oval with toothed margins. The inflorescences are catkins, separate male and female flowers on the same tree. The male flowers are up to long and pendulous, while the smaller female flowers are green, erect and resemble a small cone. After wind fertilisation, the female flowers develop into long dehiscent, woody brown fruits. There are eighty to one hundred winged seeds per fruit, and these are liberated when ripe, leaving the dried out fruit husks on the tree.
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