Latest Articles from PhytoKeys Latest 2 Articles from PhytoKeys https://phytokeys.pensoft.net/ Thu, 28 Mar 2024 12:51:17 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ A phylogenetic and morphological study of the Tectaria fuscipes group (Tectariaceae), with description of a new species https://phytokeys.pensoft.net/article/80452/ PhytoKeys 195: 75-92

DOI: 10.3897/phytokeys.195.80452

Authors: Shi-Yong Dong, Shu-Hang Li, Ling Huang, Shi-Shi Tan, Zheng-Yu Zuo

Abstract: The fern species Tectaria fuscipes and morphologically similar species, which are common in tropical and subtropical mainland Asia, constitute a taxonomically confusing group. To better understand species boundaries and relationships within the T. fuscipes group, we conducted phylogenetic analyses of five plastid regions and morphological observations of herbarium specimens and living plants. As a result, we produced a generally well-resolved phylogeny of the T. fuscipes group and related species in Asia. The phylogenetic analyses supported the monophyly of the T. fuscipes group, which includes T. dissecta, T. fuscipes, T. ingens, T. paradoxa, T. setulosa, T. subfuscipes, T. subsageniacea and a new species, but excludes T. kusukusensis. However, T. fuscipes, T. subfuscipes and T. subsageniacea are almost indistinguishable in morphology, which form a complex characterised by the black linear-lanceolate stipe scales. The new species found in southern China and Vietnam is described here as T. fungii. It is similar to the T. fuscipes complex and T. kusukusensis, but differs from the former mainly by its brown-castaneous lanceolate stipe scales and from the latter by having nearly hairless laminae (versus frond axes abaxially bearing copious hairs).

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Research Article Mon, 9 May 2022 17:53:21 +0300
Tectaria danangensis (Tectariaceae), a new fern species from Vietnam https://phytokeys.pensoft.net/article/80129/ PhytoKeys 194: 1-13

DOI: 10.3897/phytokeys.194.80129

Authors: Van The Pham, Shu-Han Li, Shi-Yong Dong

Abstract: A new fern species, Tectaria danangensis (Tectariaceae) from Vietnam, which had long been misreported as T. crenata, is described and illustrated. The new species resembles T. poilanei, a species long neglected in the fern flora of Indochina, in the frond shape and sori arrangement, but differs by its irregularly 2-rowed sori (versus regularly 2-rowed, distantly and evenly arranged) between lateral veins of pinnae, fronds being more or less dimorphic (versus monomorphic) and basal pinnae each with a base-joined (versus free) lobe. Phylogenetic analyses of five plastid regions (atpB, ndhF + ndhF-trnN, rbcL, rps16-matK + matK and trnL-F) suggested T. danangensis has a close affinity to T. harlandii. Tectaria danangensis appears to be an intermediate species between T. harlandii and T. poilanei.

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Research Article Mon, 11 Apr 2022 09:53:57 +0300