Ostrya rehderiana

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

Overview

Critically Endangered

Description

Genus Ostrya

Trees , 9--18 m ; trunks usually 1, branching mostly deliquescent, trunk and branches terete . Bark of trunk and branches brownish gray to light brown, thin, smooth , breaking and shredding into shaggy vertical strips and scales ; lenticels generally inconspicuous. Wood nearly white to light brown, very hard and heavy, texture fine. Branches, branchlets , and twigs conspicuously 2-ranked; young twigs differentiated into long and short shoots . Winter buds sessile, ovoid , somewhat laterally compressed , apex acute; scales many, imbricate, longitudinally striate . Leaves on long and short shoots, 2-ranked. Leaf blade narrowly ovate to ovate, elliptic , or obovate with 10 or more pairs of lateral veins, 2.5--13 × 1.5--6 cm, thin, margins doubly serrate to serrulate ; surfaces abaxially glabrous to tomentose . Inflorescences: staminate catkins terminal on branches, mostly in small, racemose clusters , formed previous growing season and exposed during winter, expanding with leaves; pistillate catkins proximal to staminate on short, lateral, leafy new growth, solitary, ± erect , elongate , bracts and flowers uncrowded. Staminate flowers in catkins 3 per bract, crowded together on pilose receptacle; stamens 3(--6), short; filaments often divided part way to base ; anthers divided into 2 parts, each 1-locular, apex pilose. Pistillate flowers 2 per bract. Infructescences loosely imbricate, strobiloid clusters of closed inflated bracts; clusters pendulous, elongate; bracts deciduous with fruit, inflated, bladderlike, each bract enclosing 1 fruit. Fruits small nutlets , ovoid, longitudinally ribbed , often crowned with persistent sepals and styles. x = 8.

Species ca. 5: mostly north temperate zones

In North America Ostrya consists of small trees in the northern temperate deciduous forest zone and in the mountains of southwestern United States and adjacent Mexico. Mexican populations have generally been treated as conspecific with O. virginiana of eastern United States and Canada. They differ in various respects, however, including leaf shape and indumentum; the morphologic variation and phytogeography of the complex as a whole should be carefully examined. Ostrya carpinifolia Scopoli is a common and important forest tree of southern Europe.

Ostrya shares many features with Carpinus. The staminate catkins in most species of Ostrya are produced the season before anthesis but, unlike Carpinus, they are exposed during the winter. Dispersal occurs as it does in Carpinus, except that the bracts form closed, bladderlike structures rather than flat wings.

The wood of Ostrya is used for fuel, fence posts, and various other purposes. It was formerly utilized for manufacturing items subject to prolonged friction, including sleigh runners , wheel rims , and airplane propellers. Because of its hardness , it has been used for tool handles, mallet heads , and other hard wooden objects.[1]

Taxonomy

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: Govaerts R., 11-Nov-2003

Similar Species

Members of the genus Ostrya

ZipcodeZoo has pages for 35 species, subspecies, varieties, forms, and cultivars in this genus:

O. atlantidis · O. carpinifolia (European Hop Hornbeam) · O. chisosensis (Big Bend Hop-Hornbeam) · O. guatemalensis · O. italica carpinifolia · O. italica virginiana · O. japonica · O. knowltoni · O. knowltonii (Knowlton's Hop-Hornbeam) · O. knowltonii chisosensis · O. knowltonii subsp. chisosensis · O. mexicana · O. multinervis · O. oregoniana · O. ostrya var. virginiana · O. quercifolia · O. rehderiana · O. scholzii · O. trichocarpa · O. virginia · O. virginiana (American Hop Hornbeam) · O. virginiana var. chisosensis (Correll) Henrickson, comb. nov. ined. (American Hop-Hornbeam) · O. virginiana f. glandulosa · O. virginiana glandulosa · O. virginiana guatemalensis (American Hop-Hornbeam) · O. virginiana lasia (American Hop-Hornbeam) · O. virginiana subsp. guatemalensis · O. virginiana subsp. lasia · O. virginiana var. guatemalensis · O. virginiana var. virginiana · O. virginiana var. chisonsensis · O. virginiana virginiana · O. virginica var. eglandulosa · O. virginica var. glandulosa · O. yunnanensis

More Info

• Search for Pictures: images.google.com
• Search for Scholarly Articles: Google Scholar
• Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
• Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books

Further Reading

• Li-kuo, F. and Jian-ming, J. (eds) 1992. China Plant Red Data Book – Rare and Endangered Plants 1. Science Press, Beijing.
• National Environment Protection Bureau. 1987. The list of rare and endangered plants protected in China. Botanical Institute of Chinese Academy of Sciences, Academy Press, Beijing.
• Walter, K.S. 1992. Trip report - Workshop on biodiversity data for the GEF Biodiversity Action Plan for China. Beijing, 9-13 November 1992 (unpublished).
• Fernald, M. L. 1936b. Plants from the outer coastal plain of Virginia. Rhodora 38: 376--404, 414--452.

Notes

Contributors

• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
• Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed November 1, 2006.
• The International Plant Names Index. Accessed Jan 19, 2007.
• World Checklist of Selected Plant FamiliesFeb 2, 2006.
• World Conservation Monitoring Centre 1998. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 19, 2008.

Identifiers

• Biodiversity Heritage Library NamebankID: 5957607
• Catalogue of Life Accepted Name Code: Kew-144635
• Globally Unique Identifier: urn:lsid:ipni.org:names:108053-1
• International Plant Names Index (IPNI) ID: 108053-1
• IUCN ID: 32304
• Zipcode Zoo Species Identifier: 1020721

Footnotes

1. "Ostrya". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]

©2004-2009 the BayScience Foundation, Inc. All rights reserved.