The need for a herbarium in the country was recognized by implementing the nationally significant Flora of Bhutan project in the early 1970s when major botanical collections and expeditions were initiated. The key achievements of the flora project are collections of representative herbarium specimens and the commencement of publications on the Flora of Bhutan. The specimens collected were mainly deposited at the renowned international herbaria of the Royal Botanic Garden Edinburgh, the Royal Botanic Garden Kew, the British Museum (Natural History), Tokyo University, and the Indian Botanic Garden. However, the duplicates were retained in the herbarium under the then Department of Forests. Later in 1987, the herbarium was shifted to the Forestry Research Centre at Taba. However, several specimens deteriorated due to a lack of proper storage facilities.
Finally, it was moved to the present location at Serbithang under the National Biodiversity Centre. In 1998, the “National Herbarium and Flora of Bhutan project” were initiated with financial support from DANIDA. The National Herbarium was established and the publication of three volumes comprising nine books on the Flora of Bhutan was completed. In 2003, the National Herbarium became operational with basic facilities, and the Flora of Bhutan publications was conducted with financial support from DANIDA. In addition, capacity was built in the fields of botany, taxonomy, and herbarium techniques, and national and international collaborations were developed.
The collection of representative specimens was prioritized to strengthen explorations, collections, and documentation of the floristic diversity in the country through several botanical projects namely the:
Currently, the National Herbarium houses over 20,000 specimens mostly of vascular plants classified according to the Engler and Prantl system of classification. The collections include angiosperms, gymnosperms, pteridophytes (ferns and allies), and bryophytes (mosses and liverworts) of Bhutan.
Facilities and capacity for herbarium techniques were established with international standards. The program also provided technical support and basic facilities for the establishment of four field herbaria in the protected areas of Sakteng Wildlife Sanctuary (Tashigang), Bumdeling Wildlife Sanctuary (Trashiyangtse), Wangchuck Centennial National Park (Bumthang), and Jigme Dorji National Park (Gasa) through financial support from the BTFEC. In addition to the Flora of Bhutan, the Checklist of Bhutanese Ferns – Pteridophytes of Bhutan (2009), the handbook on the Plants Endemic to Bhutan Himalaya (2015), and the checklist of the HANAs flora – Alpine Plants of Bhutan Himalaya (2017) were published. Four plant species new to science namely, Meconopsis gakyidiana (revision and up-gradation of National Flower to species level), M. merakenis, M. elongata and Roscoea megalantha were discovered and described.
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