Tuesday, May 22, 2018

[Botany • 2018] Petrocodon asterocalyx (Gesneriaceae) • A New Species from Guangxi, China


Petrocodon asterocalyx  F.Wen, Y.G.Wei & R.L.Zhang

in Zhang, Fu, Li, et al., 2018
  DOI:  10.11646/phytotaxa.343.3.6
 gccc.gxib.cn

Abstract


Petrocodon asterocalyx F.Wen, Y.G.Wei & R.L.Zhang, a new species from the Danxia landform area in Guangxi, South China, is described and illustrated based on molecular and morphological data. The molecular evidence shows that the new species is recovered in a weakly supported clade. Within this clade, the new one is morphologically similar to P. hancei (Hemsl.) A.Weber & Mich.Möller and P. coriaceifolius (Y.G.Wei) Y.G.Wei & Mich.Möller, and it can be distinguished from the former by calyx lobes 20–40 × 2–3 mm, corolla 2.5–3.0 cm long, filaments sparsely erectly pubescent, anthers sparsely pubescent, staminodes 3, and stigmas 2; from latter by leaf blades rhombic-oblong or rhombic, base shallowly cuneate, margin crenulate to serrate, calyx lobes linear, 20–40 × 2–3 cm, and anthers 3.5–3.8 mm long, sparsely pubescent and elliptical.


Keywords: Danxia landform, endemism, flora of Guangxi, new taxon, taxonomy, Eudicots


FIGURE 3 Petrocodon asterocalyx. (A) habitat, (B) habit, (C) cymes, (D) the lateral view of flower and bud, (E) top view of flower, (F)stigma, (G) opened corolla, and (H) anthers and filaments. 

Petrocodon asterocalyx F.Wen, Y.G.Wei & R.L.Zhang, sp. nov.

Etymology:— The epithet, “asterocalyx”, means that the calyx lobes of this new species are actinomorphic and the whole calyx looks like a star.


Rui-Li Zhang, Long-Fei Fu, Shu Li, Yi-Gang Wei, Stephen Maciejewski, Michael LoFurno and Fang Wen. 2018. Petrocodon asterocalyx, A New Species of Gesneriaceae from Guangxi, China. Phytotaxa. 343(3); 259–268. DOI:  10.11646/phytotaxa.343.3.6

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