Homalium mathieuanum

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

Overview

Endangered

Interesting Facts

Description

Family Salicaceae

Trees or shrubs , deciduous or rarely evergreen , dioecious, rarely polygamous. Leaves alternate, rarely subopposite, usually petiolate , simple ; stipules persistent or caducous . Catkins erect or pendulous; each flower usually with a cupular disc or 1 or 2(or 3) nectariferous glands . Male flowers with 2-many stamens; filaments filiform , free or united ; to connate ; anthers 2(or 4) -loculed, dehiscing longitudinally. Female flowers with 1 pistil, sessile or stipitate ; ovary superior, 1- or 2-loculed; ovules several to many, anatropous , with a 1 integument; style 1, 2 in Chosenia; stigmas 2-4. Capsule dehiscing by 2-4(or 5) valves ; placenta and inside wall of ovary with long hairs . Seeds 4-numerous, glabrous ; hairs and seeds simultaneously deciduous when capsule matures.

Three genera and about 620 species: mainly N hemisphere, a few in S hemisphere; three genera and 347 species (236 endemic) in China, including at least nine hybrids and at least one introduced species .[1]

Genus Homalium

Trees or shrubs . Leaves alternate, rarely opposite or verticillate ; stipules caducous ; usually petiolate ; leaf blade pinnate-veined, margin with glandular teeth, rarely entire. Flowers bisexual , epigynous , small, in terminal or axillary , many flowered racemes or panicles, inserted singly along rachis, or in sessile to shortly pedunculate fascicles; bracts small, caducous or persistent ; pedicels slender in flower, articulate at or above middle . Sepals and/or petals often accrescent after anthesis . Calyx tube obconic, adnate to lower 2/3 of ovary and later to lower 2/3 of capsule; sepals (4 or) 5-8(-12), spreading , linear , oblong , or obovate-spatulate, persistent. Petals inserted at rim of calyx tube, usually isomerous with and similar to sepals, alternating with them. Disk glands 1 opposite each sepal, rarely more or fewer, small, fleshy , globose and hairy . Stamens inserted singly or in groups before each petal, alternating with disk glands and inserted between them, usually finally overtopping perianth; filaments free , filiform ; anthers subglobose, small, dorsifixed . Ovary semi-inferior, only upper conic part free above adnate calyx tube, 1-loculed; placentas 2-6(-8), with (1-) 3-7 ovules near apex of each placenta; styles 2-5(-7), filiform, free or united in lower 1/3 or less, free parts divergent, usually finally overtopping perianth; stigmas capitate to punctiform , small. Capsule obconic, small, for most of its length enclosed in adnate calyx tube and persistent perianth segments, leathery, apex 2-8-valvate; styles persistent. Seeds 1 to few.

Between 180 and 200 species: tropical regions of both hemispheres; ten species (six endemic) in China; four additional species (all endemic) are poorly known.[2]

Habitat

Biome: Terrestrial [3].

Taxonomy

Notes

Publishing author : Briq. Publication : Annuaire Conserv. Jard. Bot. Gen?ve 1898, 51

Similar Species

Members of the genus Homalium

ZipcodeZoo has pages for 1 species, subspecies, varieties, forms, and cultivars in this genus:

H. racemosum (White Cogwood)

More Info

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• Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books

Further Reading

• Jaffre, T., Bouchet, P. and Veillon, J.-M. 1998. Threatened plants of New Caledonia: Is the system of protected areas adequate? Biodiversity and Conservation 7(1): 36.
• Oldfield, S., Lusty, C. and MacKinven, A. (compilers). 1998. The World List of Threatened Trees. World Conservation Press, Cambridge, UK.
• Wang Chan and Fang Cheng-fu, eds. 1984. Salicaceae. Fl. Reipubl. Popularis Sin. 20(2): 1-403.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 30, 2012.
• IUCN 2012. IUCN Red List of Threatened Species. Version 2011.2. . Downloaded on January 28, 2012.
• Jaffré, T. et al. 1998. Homalium mathieuanum. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloadedon 01February2012.

Identifiers

• Biodiversity Heritage Library NamebankID: 7141005
• Global Biodiversity Information Facility Taxonkey: 15491741
• Globally Unique Identifier: urn:lsid:ipni.org:names:779822-1
• International Plant Names Index (IPNI) ID: 779822-1
• IUCN ID: 214439
• Zipcode Zoo Species Identifier: 1019721

Footnotes

1. Cheng-fu Fang, Shi-dong Zhao & Alexei K. Skvortsov "Salicaceae". in Flora of China Vol. 4 Page 139. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
2. Qiner Yang & Sue Zmarzty "Homalium". in Flora of China Vol. 13 Page 112, 113, 128. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
3. Jaffré, T. et al. 1998. Homalium mathieuanum. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 01 February 2012. [back]

©2004-2012 David Stang. All rights reserved.