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| [A-C] Polystichum ensiforme H.Shang & R.H.Jiang; [D-F] P. basipinnatum (Baker) Ching [A & D] Habit, [B & E] Portion of frond, [C & F] Portion of lamina showing sori in Shang, J.-L. Li, Z.-Y. Li, SHAO, F.-H. Li, D. Li, Liu et Jiang, 2025. (photos: Z. Y. Li; W. Q. Wang; X. L. Zhou & K. Ye). |
Abstract
Polystichum ensiforme, a new polystichoid fern species from Guangxi Zhuang Autonomous Region, China, is described and illustrated. Morphologically, the new species most closely resembles P. basipinnatum but differs in having a generally simple lamina, scattered sori, and leathery lamina texture. Phylogenetic analysis placed it as an isolated clade within P. sect. Cyrtomiopsis. A key to the species of P. sect. Cyrtomiopsis is also provided.
Cyrtomidictyum, fern, phylogeny, taxonomy, whip-like leaves, Pteridophytes
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| Morphological comparison between Polystichum ensiforme (top) and P. basipinnatum (bottom): A. & D. Habit, B. & E.Portion of frond, C. & F. Portion of lamina showing sori (photo credits: A & C by Z. Y. Li; B by W. Q. Wang; D by X. L. Zhou; E &F by K. Ye). |
Polystichum ensiforme H.Shang & R.H.Jiang, sp. nov.
Etymology:—The species epithet is derived from the Latin, ensiform (sword-shaped), referring to sword-shaped fronds of the new species.
Vernacular name:—剑叶鞭叶耳蕨(jiàn yè biān yè ěr jué)
HUI SHANG, JIAN-LING LI, ZHONG-YANG LI, WEN SHAO, FANG-HUA LI, DONG LI, HONG-MEI LIU and RI-HONG JIANG. 2025. A New simple-lamina Species of Polystichum (Dryopteridaceae) from Lingnan Region, China. Phytotaxa. 704(2); 178-186. DOI: doi.org/10.11646/phytotaxa.704.2.5 [2025-06-06]
New sword-shaped fern species found in Guangxi