Abstract
Two new species of Oreocharis Benth. from Fan Si Pan, the highest mountain in Vietnam (Sa Pa) are described and illustrated. Oreocharis grandiflora W.H.Chen, Q.H.Nguyen & Y.M.Shui, is similar to O. flavida Merr. from Hainan province, China, but differs mainly by its larger and infundibuliform corolla, stamens adnate to the base of the corolla tube and stamens coherent in two pairs. The second, Oreocharis longituba W.H.Chen, Q.H.Nguyen & Y.M.Shui, is similar to O. hirsuta Barnett, endemic to northern Thailand, but mainly differs in its pubescence, coherent stamens and glabrous filaments.
Highlights
Launched to accelerate biodiversity researchTwo new species of Oreocharis (Gesneriaceae) from Fan Si Pan, the highest mountain in Vietnam
Fan Si Pan is a species-rich diversity hotspot in Indochina, the flora of which is still incompletely known
This new species is endemic to Sa Pa, northern Vietnam and grows densely on cliffs by waterfalls along deep valleys in evergreen broad-leaved forests, at an elevation of around 1800–2010 m
Summary
Two new species of Oreocharis (Gesneriaceae) from Fan Si Pan, the highest mountain in Vietnam. Wen Hong Chen, Quang Hieu Nguyen, Run Zheng Chen, Tien Hiep Nguyen, Sinh Khang Nguyen, Van Tap Nguyen, Michael Möller, David J. Jin | Received 30 September 2017 | Accepted 24 November 2017 | Published 29 January 2018
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