No.25Zhi-Jing Qiu, Jun Zhang, Xavier-Ravi Baskaran,Jin Hu, Zhen-Yu Li & Zheng-Yu Liu
Petrocosmea nanchuanensis (Gesneriaceae), a newspecies from Chongqing, China
PhytoKeys 157: 137–144 (2020)
ABSTRACT
A new species, Petrocosmea nanchuanensis Z.Y. Liu, Z.Y. Li & Z.J. Qiu from Mt. Jinfo at Banhe valley of Nanchuan District in Chongqing Municipality (China) is described and illustrated for the first time. Even though this new species is similar to Petrocosmea barbata Craib, it has several significant morphological differences, which includes smaller leaves, repand leaf margin, densely appressed longer pubescences on both surfaces of leaves, larger flower with length of its lower lips about three times longer than that of the upper lips, oblong lower lip lobes, shorter pistil, ovate anthers and styles that are shortly pubescent or approximately glabrous above the middle. The distinct features of P. nanchuanensis and four relative species namely, P. barbata, P. longipedicellata W.T. Wang, P. cavalerieiLévl. and P. xanthomaculataG.Q. Gou & X.Y. Wang were also represented in depth. However, P. nanchuanensis is most closely related to P. barbata, based on molecular studies.
Original article link: https://phytokeys.pensoft.net/article/33625/download/pdf/
Figure 1. Drawing of Petrocosmea nanchuanensis Z.Y. Liu, Z.Y. Li & Z.J. Qiu, sp. nov. A habit B stamens C dissected corolla D calyx and pistil.
Figure 2. Petrocosmea nanchuanensis Z.Y. Liu, Z.Y. Li & Z.J. Qiu A habitat B flowering plants C flower,front view D flower, side view E flower, front view, showing pistil and anthers F hairs on abaxial leavesG stamens H hairs on the pistil.
Figure 3. Drawing of the most parsimonious tree generated from six cpDNA and two nrDNA regions(partial & unpublished). Bootstrap values are shown above branches and Bayesian posterior probabilitiesare indicated below branches.
Figure 4-6Petrocosmea nanchuanensis Z.Y. Liu, Z.Y. Li & Z.J. Qiu (Photoed by Fang Wen)
Figure 7-10Petrocosmea nanchuanensis Z.Y. Liu, Z.Y. Li & Z.J. Qiu (Photoed by Xin-Xin Zhu)
