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Conservation status 2010: protocol 3.1

Amentotaxus hatuyenensis

Hiep 1996

Common names

Dẻ tùng sọc nâu rộng, Sam bông sọc nâu rộng [Vietnamese].

Taxonomic notes

This species is very similar to Amentotaxus poilanei, another Vietnamese endemic. Both are extremely similar to A. yunnanensis and might be more appropriately described as varieties or subspecies of that taxon.

Description

As for A. yunnanensis, except that the pollen cones are borne in 10-15 pairs on ca. 10 cm long racemes, instead of in 12-20 pairs on 10-15 cm long racemes; also, the leaves spread from the shoot at a more obtuse angle, 70-90° rather than 50-70° (Farjon 2010).

Distribution and Ecology

Viet Nam: Ha Giang province. It is known from steep limestone karst mountains at 1,000-1,500 m elevation, with frequent fog and annual precipitation of about 1,800 mm, and temperatures of 15-18°C. It grows with conifers including Amentotaxus yunnanensis, Cephalotaxus mannii, Cupressus vietnamensis, Pinus fenzeliana, Tsuga chinensis, Nageia fleuryi, Podocarpus neriifolius, and Podocarpus pilgeri, as well as with various angiosperm trees and a rich epiphytic flora (Hiep et al. 2004, Farjon 2010).

A. hatuyenensis faces a high risk of extinction in the wild due to habitat loss (Hiep 2004). It is known from only a few locations but overall its status and distribution appear to still be poorly known.

Big tree

Oldest

Dendrochronology

Ethnobotany

Observations

Reportedly occurs in the Dong Van Karst Plateau Geo-Park.

Remarks

The epithet refers to Ha Tuyen province, which contained the type locality. Ha Tuyen province was subdivided in 1992, and the known distribution of this species is now in Ha Giang province.

Citations

Hiep, N.T. 1996. Flore du Cambodge, Laos et Viet Nam 28:126.

Hiep, N.T. 2004. Amentotaxus hatuyenensis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. www.iucnredlist.org, accessed 2012.10.28.

See also

Luu and Thomas 2004 provide a few brief references to occurrence and ecology.

Last Modified 2012-11-24