 |
| Pteris pseudoamoena D. M. Yang & R. Guo, in Guo, Wang, Zhang, ... et Yang, 2022. |
Abstract
A new species of fern, Pteris pseudoamoena (Pteridaceae), was identified and characterized. It is currently found in Guangxi Province, China, and Vietnam. Pteris pseudoamoena shares similar morphological characters with P. amoena and P. mcclurei, but can be distinguished by spores with echinate-tuberculate and auriculate ornamentation, straw-colored stipes, rachises and costae, and mostly free, occasionally interlinked veins. In addition, molecular evidence indicated that the new species is sister to a clade consisting of P. amoena, P. nakasimae and P. mcclurei.
Keywords: morphology characters, phylogeny, Pteris, taxonomy, Pteridophytes
 |
| The habitat and morphology of Pteris pseudoamoena. A. An individual with long apices of pinnae growing in a jungle on a calcareous hill; B. An individual with short apices of pinnae growing in a jungle on a calcareous hill; C. An individual growing in a calcareous rock crevice; D. An individual with two pairs of basiscopic pinnules at basal pinnae (J. M. Wang 20150131-4 A7); E. The abaxial side of a fertile frond; F. Segments of a fertile frond with interlinked veins indicated by arrows; G. Stipes with scales at base; H. Calcareous hills in Xialei Town, Daxin County, Guangxi Province, China. (photographed by Hong-Jin Wei except D) |
 |
| Line drawing of Pteris pseudoamoena D. M. Yang & R. Guo. A. Sterile frond; B. Fertile frond; C. Sterile segment; D. Fertile segment showing occasional interlinking of veins. Drawn by Yun-Xiao Liu based on the holotype J. M. Wang 20150130-2 (IBSC). |
Pteris pseudoamoena D. M. Yang & R. Guo, sp. nov.
Diagnosis:— Morphological features of the new species are similar to those of P. amoena Blume (1828: 210) and P. mcclurei Ching (1933: 28) with tripinnatifid laminae, but differ by having spores with echinate-tuberculate and auriculate ornamentation, strawcolored stipes, rachises and costae, free veins but occasionally interlinked veins, while P. amoena having spores with tuberculate and verrucate ornamentation, castaneous-brown to sorrel-red stipes, rachises and costae, and free veins, and P. mcclurei having spores with rugulate ornamentation, castaneous-brown to lightly brown stipes, rachises and costae, and interlinked veins ( Table 2, Figs. 2 & 3).
Distribution and Habitat:— Pteris pseudoamoena is currently found in Longzhou County and Daxin County of Guangxi Province, China, and in Kim Hy Nature Reserve of Bac Kan, Vietnam. It grows in calcareous hills with elevation 216– 600 m.
Etymology:— The specific epithet refers to the most similar species Pteris amoena of the new species.
Common name (assigned here):— Ni Hong Gan Feng Wei Jue
(拟红杆凤尾蕨; Chinese name).
Rui Guo, Jia-Mei Wang, Wen Zhang, Dan He, Jing Yu and Dong-Mei Yang. 2022. Pteris pseudoamoena (Pteridaceae), A New Species from Guangxi, China and Vietnam. Phytotaxa. 550(3); 215-223. DOI: 10.11646/phytotaxa.550.3.1 [2022-06-16]
