Indochina

The Himalayan Threatened Conifer Region extends from the northeastern provinces of Afghanistan in a narrow arc through northwestern Pakistan and India, through Nepal, Assam and northern Myanmar. Its eastern limit is at about 98° E where three major river systems (Irrawaddy, Nujiang and Mekong) converge and the main mountain ranges are orientated southwards. Throughout the area climates and vegetation are heavily influenced by summer monsoons and the rapid rise in elevation. The conifer flora is concentrated in the mid montane areas above 1500m above sea-level and is dominated by members of the Pinaceae and Cupressaceae. Of the approximately 40 taxa that occur in this area, 22 are endemic. Most species occur in the eastern part of the region with many also occurring in Regions 7 and 8. One species, Taiwania cryptomerioides, also occurs in Region 10. Although only nine taxa have been assessed as globally threatened, several more are nationally threatened in at least one part of their range. Principal region-wide threats include harvesting for medicinal use (Taxus), overexploitation for timber and deforestation associated with agricultural and pastoral activities. Hydroelectric developments are a localized threat in some parts of the region.

Taxa in the category - Indochina:

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Abies delavayi subsp. fansipanensis (Q.P.Xiang) Rushforth

This subspecies, described in 1997, is restricted to a single mountain in Northern Việt Nam. The main threats are its small population size and restricted distribution which make it potentially susceptible to stochastic events.  Read full species entry >

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Amentotaxus argotaenia (Hance) Pilg

A widespread species that only ever occurs in small isolated populations. It is currently assessed as Near Threatened due to range wide deforestation. Read full species entry >

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Amentotaxus hatuyenensis T.H.Nguyên

This species was described in 1996 from the karst limestone areas of Hagiang province in northern Việt Nam. Recent field work and molecular research indicates that this taxon is conspecific with Amentotaxus yunnanensis. Consequently it is due to be removed from the IUCN Redlist. Read full species entry >

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Amentotaxus poilanei (Ferré & Rouane) D.K.Ferguson

Amentotaxus poilanei has only been recorded from a single locality on the Ngoc Linh massif in Kontum province. General deforestation and trans national road building may be threats in the near future. Read full species entry >

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Amentotaxus yunnanensis H.L.Li

Distributed in China, Loa PDR and Việt Nam where it is threatened by general deforestation and selective logging. Read full species entry >

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Calocedrus macrolepis Kurz

A widespread species that has been exploited for timber and resin. Difficulties in estimating the extent of its decline and a lack of information about its staus is some parts of its range have resulted in an assessment of Near Threatened. Read full species entry >

Foliage
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Calocedrus rupestris Aver.,T.H.Nguyên & P.K.Lôc

Calocedrus rupestris was first described in 2008 from Việt Nam: prior to this Calocedrus trees occurring on limestone karst  were wrongly identified as Calocedrus macrolepis.  In 2011 C. rupestris was discovered in Guangxi. Threats include selective logging for timber, deforestation and forest degradation. Read full species entry >

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Cephalotaxus mannii Hook. f.

Although widely distributed in southeastern Asia it is often targeted for its timber. Futher threats include the conversion of its habitat to agriculture land which has resulted in severe forest fragmentation. Read full species entry >

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