Dẻ tùng sọc nâu rộng, Sam bông sọc nâu rộng [Vietnamese].
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.
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).
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.
Reportedly occurs in the Dong Van Karst Plateau Geo-Park.
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.
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.
The species account at Threatened Conifers of the World.
Luu and Thomas 2004 provide a few brief references to occurrence and ecology.
Last Modified 2017-11-12