No.8 Dong-Xin NONG , Bao-You HUANG, Shi-Yue NONG & Yu-Song HUANG

Petrocodon albinervius, a new species of Gesneriaceae from limestoneareas in southwestern Guangxi, China

Taiwania 2021, 66(2) :135-140

ABSTRACT

Petrocodon albinervius D.X. Nong & Y.S. Huang (Gesneriaceae) is described and illustrated as a species new to science occurring in the limestone area of southwestern Guangxi, China. It shows overall most similarity with P. ionophyllus F. Wen, S. Li & B. Pan, P. integrifolius (D. Fang & L. Zeng) A. Weber & Mich. Möller and P. ainsliifolius W.H. Chen & Y.M. Shui in leaf shape, but differs in several characters such as the leaf blade indumentum, leaf veins coloration, the size and shape of bracts, the number of cymes per plant and flowers per cyme, and the shape of the stigma. Besides a diagnosis and detailed description, we also provide ecological information, photographic images, a table and taxonomic notes to distinguish several other morphologically similar Petrocodon species and proposed conservation status for this species.

Original article link: https://taiwania.ntu.edu.tw/pdf/tai.2021.66.135.pdf

Fig. 1. Petrocodon albinervius sp. nov. A. Habit. B. Opened corolla (showing stamens and staminodes). C. Calyx and pistil. D. Stigma. Illustration by W.-H. Lin (IBK) based on specimen D.-X. Nong & Y.-S. Huang Y1219.

Fig. 2. Petrocodon albinervius sp. nov. A. Habitat. B–C. Habit in natural habitat. D. Leaf blade. E. Inflorescences. F. Flower buds. G. Flowers in oblique top view. H–I. Flowers in front view. J. Flowers in top view. K–L. Opened corolla. K, Photographed by H.-Z. Lv (GXMG).

Fig. 3. The distribution of Petrocodon albinervius sp. nov. and its morphologically-close species. A. P. albinervius sp. nov. B. P.ionophyllus. C. P. ainsliifolius. D. P. integrifolius.

Fig. 4-8. The flowering plant of Petrocodon albinervius sp. nov. cultivated in nursery of National Gesneriaceae Germplasm Resources Bank & GCCC