Comments
provided by eFloras
Still locally abundant in the E Himalayan foothills, this species is now rare in Yunnan, its distribution affected by habitat loss. The wood is heavy and is used for building houses. The tree is a source of a balsam used for caulking boats.
This species is very variable at the extremes of its range: China, N Vietnam, and Indonesia (Java). Dipterocarpus macrocarpus was recognized on account of its dense tomentum on twigs, leaf buds, and leaf abaxial surface, and D. mannii on account of its somewhat smaller parts and ca. 25 stamens. Two varieties of D. retusus can be recognized in China, and they may co-occur in the same stand.
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Description
provided by eFloras
Trees, lofty, to 45 m tall. Bark gray or brown, shallowly flaky, not longitudinally fissured or only at base. Branchlets glabrous or persistently buff pubescent; leaf buds obtuse, stout, glabrous, setose, or woolly. Stipules green or red, lanceolate, to 15 cm, glabrous or pubescent outside (always stellate pubescent on young trees); petiole glabrous; leaf blade broadly ovate, 16-28 × 10-15 cm, leathery, abaxially sparsely or densely golden-buff stellate pubescent, adaxially initially white strigose, sometimes glabrescent, lateral veins 16-19 pairs conspicuously raised abaxially, base rounded or somewhat cordate, margin entire or sinuate-crenate in distal half, apex acute. Racemes axillary, 8-10 cm, 2-5-flowered. Calyx segments: 2 rather long and linear, 3 shorter and triangular. Petals reddish, sweetly scented, narrowly elliptic, 5-6 cm, with dense squamate hairs, margin slightly reflexed, apex obtuse. Stamens (25-)30; anthers linear to lanceolate, ca. 5 mm, sagittate at base, coherent; connective appendages aristate; filaments filiform, dilated at base. Ovary narrowly ovoid, sericeous-tomentose, 3-loculed, with 2 ovules per locule; style finely terete, with long silky hairs on lower half. Nut ovoid, densely yellowish gray tomentellate; calyx tube to 3.5 cm in diam.; winglike calyx segments red, linear-lanceolate, to 19-23 × 3-4 cm, leathery, stellate-tomentellate, 3-5-veined, apex rounded. Fl. May-Jun, fr. Dec-Jan of following year.
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Distribution
provided by eFloras
SE Xizang, SE and W Yunnan [India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam].
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Habitat
provided by eFloras
Humid valley rain forests, dense forests on limestone; below 1000 m.
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Dipterocarpus retusus
(
Asturian
)
provided by wikipedia AST
Dipterocarpus retusus ye una especie d'árbol de grandes dimensiones, y probablemente la especie más conocida del xéneru Dipterocarpus. En khmer denominar chhë tiël pré:ng,[2] y 东京龙脑香 dong jing long nao xiang en chinu.[3]
Distribución
Ye nativu de China, Vietnam, Filipines, Laos, Camboya, Malasia, Indonesia, Myanmar, ya India.[1][2]
Hábitat
L'árbol algama un altor de 20 a 30 m, y en Camboya esisten trupos montes d'esta especie nes planicies, ye común nos faldeos de los montes y al pie de ríos y en montes ente los 800m y 1500msnm.[2]
Descripción
Dipterocarpus retusus ye un árbol grande que puede algamar hasta los 45 m d'altor. La so corteza ye de color gris o escames de color marrón en parches. Les fueyes son coriacees llargamente ovaes, miden 16 a 28 cm de llargu, contienen de 16 a 19 pares de costielles que sobresalen y terminen nun puntu nel ápiz. El so marxe ye enteru o sinuado-crenáu. Les flores arrexuntar n'arumaos recímanos axilares dende agostu a ochobre y contienen de 2 a 5 flores cada unu. La mota ta formáu por dos segmentos llargos y trés curtios triangulares. La corola componer de cinco pétalos blancos con una banda de color acoloratáu, estrechamente elíptiques y miden de 5 a 6 cm de llargu. El frutu ye una núcula ovoide y tomentosa, estender polos segmentos de la mota acoloratada, dos de los cualos son bien allargaos y miden 19-23 cm de llargu y 3-4 cm d'anchu (d'ende'l nome del xéneru "dipterocarpos" o "nales en granes"). El floriamientu producir ente mayu y xunu y los frutos maurecen n'avientu o xineru.
Usos
Ye famosu pola so madera y la so resina. En Camboya, la resina ye recoyida nes rexones montascoses, pa fabricar antorches y veles, ente que la madera ye utilizada pa construcción de columnes y tableros.[2]
Taxonomía
Dipterocarpus retusus describióse por Carl Ludwig Blume y espublizóse en Catalogus ... 1823: 77. 1823.[4]
- Sinonimia
-
Dipterocarpus austroyunnanicus Y.K. Yang & J.S. Wu
-
Dipterocarpus luchunensis Y.K. Yang & J.K. Wu
-
Dipterocarpus macrocarpus Vesque
-
Dipterocarpus mannii King ex Kanjal, P.C.Kanjal & D.Das
-
Dipterocarpus occidentoyunnanensis Y.K. Yang & J.K. Wu
-
Dipterocarpus pubescens Koord. & Valeton
-
Dipterocarpus spanoghei Blume
-
Dipterocarpus tonkinensis A.Chev.
-
Dipterocarpus trinervis Blume[5]
Ver tamién
Referencies
-
↑ 1,0 1,1 Ashton, P.. «Dipterocarpus retusus» (inglés). Llista Roxa d'especies amenazaes de la UICN 2011.2. Consultáu'l 14 d'abril de 2012.
-
↑ 2,0 2,1 2,2 2,3 DY PHON, Pauline, 2000, Plants Used In Cambodia, printed by Imprimerie Olympic, Phnom Penh
-
↑ Flora of China, http://flora.huh.harvard.edu/china/pdf/PDF13/Dipterocarpus.pdf
-
↑ «Dipterocarpus retusus». Tropicos.org. Missouri Botanical Garden. Consultáu'l 28 d'ochobre de 2014.
-
↑ «Dipterocarpus retusus». The Plant List. Consultáu'l 26 d'ochobre de 2014.
Bibliografía
- Flora of China Editorial Committee. 2007. Flora of China (Clusiaceae through Araliaceae). 13: 1–548. In C. Y. Wu, P. H. Raven & D. Y. Hong (eds.) Fl. China. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
Enllaces esternos
!["Cymbidium]("https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Cymbidium_Clarisse_Austin_%27Best_Pink%27_Flowers_2000px.JPG/50px-Cymbidium_Clarisse_Austin_%27Best_Pink%27_Flowers_2000px.JPG")
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Dipterocarpus retusus: Brief Summary
(
Asturian
)
provided by wikipedia AST
Dipterocarpus retusus Dipterocarpus retusus ye una especie d'árbol de grandes dimensiones, y probablemente la especie más conocida del xéneru Dipterocarpus. En khmer denominar chhë tiël pré:ng, y 东京龙脑香 dong jing long nao xiang en chinu.
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- Wikipedia authors and editors
!["]("http://ast.wikipedia.org/wiki/Ficheru:Dipterocarpus_tonkinensis_Cho_nau.JPG")
