The recently published new taxa and new records of Gesneriaceae from China before 31 December 2023 (2)

No. 2 Zi-Meng YANG,Wei-Chuen CHOU,Stephen MACIEJEWSKI,Yi-Gang WEI

Primulina nymphaeoides (Gesneriaceae), a new species from Guangxi, China

Taiwania 68(1): 44‒50, 2023

ABSTRACT

Primulina nymphaeoides, a new cave-dwelling species of Gesneriaceae from the limestone region of southwestern Guangxi, China is described and illustrated. Morphologically, it is most similar to P. longzhouensis, but differs by having some easily distinguished characteristics, for example different leaf blade indumentum, obviously fewer flowers on one cyme, bigger flower size, and different stigma shape, and so on. Furthermore, the phylogenetic analysis of two DNA region ITS and trnL-F sequence including 179 taxa of Primulina s.l. has been provided. Both Bayesian inference (BI) and maximum likelihood (ML) analyses show the similar supported tree topology, indicating that P. nymphaeoides is recovering as one of species in a phylogenetic polytomy closed to P. longzhouensis and other species. A Global Species Conservation Assessment classifies P. nymphaeoides as Critically Endangered (CR).

Original article link: https://taiwania.ntu.edu.tw/abstract/1906

Table 1. Statistics for the molecular datasets used in this study

Fig.1. Phylogenetic tree

Table 1. Morphological comparison of Primulina nymphaeoides and P. longzhouensis.

Fig. 2. Primulina nymphaeoides sp.nov. A: Habitat. B: Habit. C: Flower. D: The adaxial surface of leaf blades. E: The abaxial surface of leaf blades. F: Cyme. G: Corolla, pistil and calyx. H: Top view of corolla. I: Side view of corolla. J: Calyx. K: Opened corolla for showing stamens and staminodes.