No.21  LI-HUA YANG & BO PAN：

Primulina albicalyx (Gesneriaceae), a new species from a karst area in Guangxi, China

Willdenowia  47(3):311-316.

ABSTRACT

Primulina albicalyx, a new species of Gesneriaceae from Guangxi Zhuang Autonomous Region, SW China, is described and illustrated. This new species is similar to P. leprosa by its yellow flowers, white calyx lobes and large bracts, but can be easily distinguished from the latter by some qualitative and quantitative characters in the leaf blade, peduncle and corolla. The conservation status of P. albicalyx can be considered as Critically Endangered (CR) according to the IUCN Red List categories and criteria.

Fig. 1.  Primulina albicalyx – A: habit; B: pistil; C: opened corolla, showing stamens and staminodes; D: fruit; E: flower in lateral view; F: flower in front view; G: calyx lobes. – Drawn from cultivated individuals collected from the type locality by Yun-Xiao Liu.

Fig. 2.  Primulina albicalyx – A: habit; B: cyme; C: flowers in front view; D: flower in lateral view; E: opened corolla, showing stamens and staminodes; F: fruits; G: bract; H: pistil and calyx lobes. – A, F: photographed at the type locality on 21 June 2015 by Bo Pan; B–E, G, H: photographed at Guilin Botanical Garden on 14 May 2016 by Bo Pan.

Fig. 3.  Geographical distribution of Primuina albicalyx (▲) and P. leprosa (●).