Hopea dasyrrhachia

• Overview
• Description
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Overview

Endangered

Description

Family Dipterocarpaceae

Trees , evergreen or semievergreen, rarely deciduous in dry season . Xylem with aromatic resin in intercellular resin canals. Branchlets with stipular scars , sometimes annular . Leaves simple , alternate; stipules persistent or caducous , large or small; leaf blade with lateral veins pinnate, margin entire or sinuate-crenate. Inflorescences few- or many-flowered, terminal or axillary racemes or panicles; flowers usually sweetly scented; bracts usually fugacious and minute, rarely persistent and large. Inflorescences, calyces, petals, ovary, and other parts usually with stellate , squamate , fascicled or free-standing hairs . Flowers bisexual , actinomorphic , contorted. Calyx lobes 5, free or united at base , imbricate in bud if not united. Petals 5, adnate or connate at base. Stamens (10-) 15 to many, free from or connate to petals; filaments usually dilated at base; anthers 2-celled, with 2 pollen sacs per cell (Chinese species) ; connective appendages aristate , filiform or stout. Ovary superior, rarely semi-inferior, slightly immersed in torus, usually 3-loculed, each locule 2-, rarely many ovuled; ovules pendulous, lateral or anatropous . Fruit usually nutlike, sometimes capsular and 3-valved, 1(to many) -seeded, with persistent, variously accrescent calyx of which 2 or more lobes are usually developed into lorate wings. Seed exalbuminous ; cotyledons fleshy , equal or unequal, applanate or folded or cerebriform , entire or laciniate ; radicle directed toward hilum , usually included between cotyledons.

About 17 genera and 550 species: tropical Africa, Asia, and South America (in Asia, most species and genera in NW Borneo) ; five genera and 12 species (one endemic, one introduced ) in China.[1]

Genus Hopea

Trees evergreen , of main canopy or understory , white resinous . Stipules caducous , small; leaf blade thinly leathery; lateral veins pinnate; tertiary veins scalariform (in Chinese species) [or subreticulate], margin entire . Flowers sessile or shortly pedicellate , in lax panicles of unilateral racemes ; bracts early caducuous, linear . Calyx segments imbricate. Exposed parts of petals usually pubescent in bud. Stamens (10-) 15, slightly connate and adnate to petals; anthers ovoid , small, subequal ; connectival appendages aristate or filiform . Ovary ovoid, with prominent filiform style, or hourglass-shaped, with short tapering style . Fruit ovoid or globose ; pericarp usually thin, waxy; 1-seeded, closely surrounded by thickened base of calyx segments; 2 fruit sepals winglike, linear, or all orbicular or ovate , subequal.

About 100 species: Cambodia, China, S India, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Philippines, Thailand, Vietnam; four species (one endemic) in China.

These trees are a source of a damar resin used in varnishes. The wood is finely grained, very durable, and used for making boats , bridges , and furniture.[2]

Habitat

Ecology: The species is locally abundant on limestone slopes .[3]

Taxonomy

Similar Species

Members of the genus Hopea

There are approximately 200 species in this genus. Here are just 100 of them:

H. acuminata · H. aequalis · H. albescens · H. altocollina · H. andamanica · H. andersonii · H. andersonii basalticola · H. anomala · H. apiculata · H. aptera · H. argentea · H. aspera · H. auriculata · H. avellanea · H. balangeran · H. bancana · H. basilanica · H. beccariana · H. bilitonensis · H. borneensis · H. brachyptera · H. bracteata · H. brevipetiolaris · H. bullatifolia · H. cagayanensis · H. canarensis · H. celebica · H. celtidifolia · H. centipeda · H. cernua · H. chinensis · H. conduplicata · H. cordata · H. cordifolia · H. coriacea · H. curtisii · H. dalingdingan · H. dasyrrachis · H. dasyrrhachia · H. dasyrrhachis · H. dealbata · H. decandra · H. depressinerva · H. discolor · H. diversifolia · H. dolosa · H. dryobalanoides · H. dyeri · H. eglandulosa · H. enicosanthoides · H. erosa · H. exalata · H. fagifolia · H. faginea · H. ferrea · H. ferruginea · H. floribunda · H. fluvialis · H. forbesii · H. foxworthyi · H. fulvialis · H. garangbuaya · H. glabra · H. glabrifolia · H. glaucescens · H. globosa · H. glutinosa · H. gracilis · H. grandiflora · H. gratissima · H. gregaria · H. griffithii · H. grisea · H. hainanensis · H. hasskarliana · H. heimiana · H. helferi · H. hongayanensis · H. hongayensis · H. inexpectata · H. intermedia · H. iriana · H. jacobi · H. javanica · H. jianshu · H. johorensis · H. jucunda · H. jucunda jucunda · H. jucunda modesta · H. juncunda · H. kelantanensis · H. kerangasensis · H. laevifolia · H. laevis · H. lanceolata · H. latifolia · H. laxa · H. linggensis · H. longiflora · H. longifolia

More Info

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Further Reading

• Ashton, P. 1996. Annotations to: Conservation status listing for Dipterocarpaceae.
• Giesen, W. 1987. Danau Sentarum Wildlife Reserve, inventory, ecology and management guidelines. World Wildlife Fund, Zeist, The Netherlands.
• Tong Shaoquan & Tao Gouda. 1990. Dipterocarpaceae. In: Li Hsiwen, ed., Fl. Reipubl. Popularis Sin. 50(2): 113-131.

Notes

Contributors

• Ashton, P. 1998. Hopea dasyrrhachia. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 20 October 2006.
• Ashton, P. 1998. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 19, 2008.

Identifiers

• Biodiversity Heritage Library NamebankID: 7143987
• IUCN ID: 33721
• Zipcode Zoo Species Identifier: 1021757

Footnotes

1. Xi-wen Li, Jie Li & Peter S. Ashton "Dipterocarpaceae". in Flora of China Vol. 13 Page 48. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
2. "Hopea". in Flora of China Vol. 13 Page 48, 49. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
3. Ashton, P. 1998. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 19, 2008. [back]

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