Heterostemma brownii (Apocynaceae), a new record for Laos and Thailand

Abstract

Heterostemma brownii is reported as a new record for the floras of Laos and Thailand. A lectotype is also designated for the name Heterostemma brownii. A description based on Thai and Lao collections, photographs and notes are provided.

Heterostemma menghaiense (Apocynaceae), a new record for Laos and Thailand

“…Young follicles divergent, elliptic to slightly lunate, 2.5-5 × 0.5-1 cm, densely pubescent. Notes.-This taxon was originally described by Zhu & Wang (1994) as Heterostemma villosum var. menghaiense from Yunnan, China at 1,000-2,000 m above sea level, occurring near streams.…”

“…In Thailand, nine species are recorded (Thaithong et al, 2018;Kidyoo, 2019;Agnihotri et al, 2019;Kidyoo & Thaithong, 2019;Thammarong et al, 2020). In neighbouring Laos, four species of Heterostemma were previously recorded (Newman et al, 2007;Jin et al, 2016;Thammarong et al, 2019;Thammarong et al, 2020).…”

“…(Apocynaceae) with 30-40 species globally (Rodda, 2016) is distributed in India, Sri Lanka, Nepal, Bangladesh, China, Myanmar, Thailand, Laos, Vietnam, the Malesian region and Australia (Swarupanandan et al, 1989;Forster, 1992). In Thailand, nine species are recorded (Thaithong et al, 2018;Kidyoo, 2019;Agnihotri et al, 2019;Kidyoo & Thaithong, 2019;Thammarong et al, 2020). In neighbouring Laos, four species of Heterostemma were previously recorded (Newman et al, 2007;Jin et al, 2016;Thammarong et al, 2019;Thammarong et al, 2020).…”