Bistorta griersonii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Polygonales Polygonaceae

Scientific Name: Bistorta griersonii Yonek. & H.Ohashi

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(iii) ver 3.1
Year Published: 2017
Date Assessed: 2015-11-24
Assessor(s): Bhutan Endemic Flowering Plants Workshop
Reviewer(s): Scott, J.A. & Tallant, J.
Contributor(s): Dema, S., Dhendup, T., Tamang, K., Dorji, K., Dorji, T., Gyeltshen, N., Gyeltshen, N., Katel, O.N., Letro, Namgangla, Tobgay, K., Wangchuk, R., Thinley, T., Wangdi, Y., Wangmo, C., Wangmo, S. & Yangzom, R.
Facilitator/Compiler(s): Hilton-Taylor, C.
This is a poorly known species, known only from two records (= two locations). It appears to have a small area of occupancy (8 km2) and the extent of occurrence cannot be estimated based on the current records. The main threat is the impact of Ophiocodyceps collectors on the habitat which are causing a continuing decline in the quality of the habitat. The species therefore qualifies for listing as Endangered.

Geographic Range [top]

Range Description:This species is endemic to Bhutan. It is confined to the centre of the country, occurring at Dhur Chu and Jiu La, Bumthang. Known from two collections recorded at 4,500 and 4,724 m asl respectively.
Countries occurrence:
Additional data:
Estimated area of occupancy (AOO) - km2:8
Number of Locations:2
Lower elevation limit (metres):4500
Upper elevation limit (metres):4724
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no information on population size or trends.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:A herb growing among rocks, on cliff ledges and on steep sandy banks.
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): Trampling and digging by collectors of Ophiocordyceps might pose a threat.

Conservation Actions [top]

Conservation Actions: Both collecting localities are within the Wangchuck Centennial National Park. Efforts are required to relocate this species as it is only known from two collections, one made in 1949 and the other in 1993 (photographed).

Citation: Bhutan Endemic Flowering Plants Workshop. 2017. Bistorta griersonii. The IUCN Red List of Threatened Species 2017: e.T84488419A84548558. . Downloaded on 17 March 2018.
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