Reinwardtia glandulifera (Linaceae), a new species from Kachin State, northernMyanmar

During the fieldwork in northern Myanmar, specimens of Reinwardtia were found in Putao, Kachin state. Reinwardtia glandulifera is a species new to science.

Reinwardtia Dum. (Linaceae) with one species Reinwardtia indica Dum. is mainly distributed in northern India, China and Southeast Asia. The genus belongs to subfamily Linoideae, tribe Eulineae. Reinwardtia indica is heterostylous, and dimorphic pollen and stigmas are reported. Historically, two Reinwardtia species, R. tetragyna Planchon and R. trigyna (Roxburgh) Planchon have been recorded in Myanmar, but R. trigyna has been treated as a synonym of R. indica.

During November and December in 2014 and 2016, a team from Xishuangbanna Tropical Botanical Garden (XTBG) and Kunming Institute of Botany (KIB), in collaboration with the Forest Research Institute (FRI) and Natural Wildlife Conservation Division (NWCD) of Myanmar, conducted fieldwork in northern Myanmar to survey plant diversity. During this fieldwork, specimens of Reinwardtia were found in Putao, Kachin state. Based on a detailed examination of the morphological and anatomical characteristics of our material with R. indica, we arrived at the conclusion that the specimens collected in Myanmar belong to a species new to science. This new species is similar to R. indica, but differs in its elliptic to obovate-elliptic bracts and calyces, 6.0–7.5 ×2.0–3.5 mm, with dense glandular hairs on the margins, petals free at the base and flowers with five styles. The species epithet refers to the bracts and calyces with conspicuous glandular hairs along the margin (Fig.1).

This work was financially supported by a project of the Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences (Y4ZK111B01).The result published as "Reinwardtia glandulifera (Linaceae), a new species from Kachin State, northernMyanmar" on Phytotaxa.

1.jpg

FIGURE 1. Reinwardtia glandulifera. A–B. Habit. C. Inflorescence. D–E. Fruit. F–G. Stamen and pistil, showing heteromorphy. H. Petals. I. Bract and calyx. Photographed by Yun-Hong Tan.