Ostrya rehderiana — Details

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Overview

Distribution

Range Description

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The wild population is now apparently confined to five damaged individuals on Xitianmu Mountain.
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Ostrya rehderiana Chun:
China (Asia)
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Physical Description

Morphology

Comments

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This species is endangered; only one tree is known at a roadside.
  • Flora of China @ eFloras.org
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Description

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Trees to 15 m tall; bark gray, rough. Branchlets brown-gray, slender, sericeous-pubescent when young, becoming glabrous and intensely purplish. Petiole 3-5 mm, densely pubescent; leaf blade elliptic-oblong or narrowly oblong, 3-10 × 1.8-4 cm, abaxially sparsely pubescent and hirtellous, densely pubescent along midvein, adaxially glabrous except pubescent along midvein, base subrounded or broadly cuneate, margin irregularly and doubly sharply serrate, sometimes setiform serrate, apex acuminate or caudate-acuminate; lateral veins 13-16 on each side of midvein, 4-7 mm apart. Female inflorescence loosely racemose, 2-3 cm; peduncle 1.5-2 cm, densely pubescent, bracts obovate-elliptic or obovate-lanceolate, saccate, 2-2.6 cm × 6-8 mm, membranous, minutely pubescent along veins and reticulate veins, base constricted into a stipe, setose, apex rounded, apiculate. Nutlet red-brown, narrowly oblong, 7-10 × 2.5-3 mm, shiny, glabrous, obscurely ribbed. Fl. May-Jun, fr. Jul-Aug.
  • Flora of China @ eFloras.org
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Type Information

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Isotype for Ostrya rehderiana Chun
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Card file verified by examination of alleged type specimen
Preparation: Pressed specimen
Collector(s): R. C. Ching
Year Collected: 1925
Locality: Anhwei, China, Asia-Temperate
  • Isotype: Chun, W. Y. 1927. J. Arnold Arbor. 8: 19.
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Ecology

Habitat

Habitat and Ecology

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Systems
  • Terrestrial
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Habitat & Distribution

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* Subtropical forests; 200-400 m. NW Zhejiang (Tianmu Shan)
  • Flora of China @ eFloras.org
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Ostrya rehderiana

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Species: 4
Species With Barcodes: 1

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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
CR
Critically Endangered

Red List Criteria
D

Version
2.3

Year Assessed
1998
  • Needs updating

Assessor/s
World Conservation Monitoring Centre

Reviewer/s

History
  • 1997
    Endangered
    (Walter and Gillett 1998)
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Threats

Threats

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Major Threats
Trees do not appear to be regenerating naturally.
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Management

Conservation Actions

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Conservation Actions
The trees are protected.
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Wikipedia

Ostrya rehderiana

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Ostrya rehderiana (Zhejiang Hop-hornbeam, Chinese: 天目铁木; literally "Tianmu iron tree") is a tree in the Betulaceae family. It can grow up to 15 metres (49 ft) tall.[2] It is endemic to Zhejiang province in China. The wild population apparently consists of only five trees on Tianmu Mountain, and the species is under first-class national protection in China.[3]

References

  1. ^ World Conservation Monitoring Centre (1998). "Ostrya rehderiana". IUCN Red List of Threatened Species. Version 2011.2. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/32304. Retrieved 12 April 2012. 
  2. ^ eFloras. "Ostrya rehderiana". Flora of China. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200006221. Retrieved 12 April 2012. 
  3. ^ "National key protected wild plants (first batch)". Nature Reserve of China. 2004-07-10. http://www.nre.cn/htm/04/bhqsj/2004-07-10-12808.htm. Retrieved 12 April 2012. 


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