No.8  FANG WEN, BI-DAN LAI, ZHI-GUO ZHAO, JIN-YAN HE & BAI-SHENG JIANG

Primulina heterochroa (Gesneriaceae), a new species from a tropical limestone area inGuangxi, China

Willdenowia, 45:45-51.

ABSTRACT

Primulina heterochroa (Gesneriaceae) is described and illustrated here. This new species morphologically resembles P. pungentisepala and P. minutimaculata, but it is easily distinguished from congeners by some qualitative and quantitative characters in leaf, bract, calyx, indumentum, corolla and inflorescence. The conservation status of P. heterochroa is assessed as Critically Endangered (CR) according to IUCN Red List categories and criteria.

Fig. 1. A–G: Primulina heterochroa – A: habit; B: cyme; C: bracts lower surface;D: opened corolla exposing stamens and staminodes; E1: flower with corollaremoved showing pedicel, calyx lobes and pistil; E2: with calyx lobes removed showing disk; F: apex of stamens showing anthers; G: stigma. – All drawn from the holotype by Ms B. D. Lai.

Fig. 2. A–G: Primulina heterochroa – A: habit; B: leaf blade upper surface; C: cyme; D: bracts lower surface; E: flower obliqueview; F: opened corolla exposing stamens and staminodes; G: flower with corolla and calyx lobes removed showing pedicel, diskand pistil. – A –G: collected from type locality, 22 Jul 2013, photographed in nursery of Gesneriad Conservation Center of China, Guilin, 23 Jul 2013, by Ms B. D. Lai & Mr B. M. Wang.

Fig. 3. Comparison of Primulina pungentisepala (A), P. minutimaculata (B) and P. heterochroa (C) showing habit (1), cyme (2) and corolla (3). – A1, A2, B1 photographed at Longzhou, Guangxi, 7 Apr 2012 (A1, A2) and 18 Jul 2013 (B1) by F. Wen; A3, B2, B3 photographed in nursery of Gesneriad Conservation Center of China, 12 Apr, 2013 (A3) and 11 Jun 2013 (B2, B3) by F. Wen; C1–C3 photographed at type locality of P. heterochroa, 22 Jul 2013 by F. Wen (C1), F. Y. Nong (C2) and B. D. Lai (C3).

Fig. 4. Distributions of Primulina heterochroa (star), P. pungentisepala (dot) and P. minutimaculata (triangle).