Abstract— Recent molecular phylogenetic studies have identified four major clades within the fern genus Tectaria but none of them is supported by any morphological characters. Here we present an expanded phylogeny of Tectaria based on five plastid markers
(atpB, ndhF + ndhF-trnN, rbcL, rps16-matK + matK, and trnL-F), with a particular focus on the species from Asia to the Solomon Islands. Our aims are to infer the systematic position of newly included species, providing insights to interspecific
relationships of some species groups, and to determine the identity of some specimens with distinct morphology. As a result, three major clades and a total of 14 lineages are identified in Asia to the Solomon Islands. The 19 newly sampled species were well resolved in the phylogenetic tree,
of which T. lobbii (representative of rare rheophytes in Tectaria) was confirmed as belonging in the T. angulata‐T. vanikoroensis lineage. Four new species from the Solomon Islands, T. acrophoroides, T. glenniana, T. pallescens,
and T. vanikoroensis, are recognized and described. Phylogenetic and morphological evidence suggests frequent hybridizations between T. crenata and T. decurrens from Malesia to the Solomon Islands, and between T. devexa and T. simonsii in mainland
Asia and adjacent islands, which render the obscure species boundaries within the two groups.
Abstract— Two new species of lycophytes, Selaginella obovata and S. zhangii, were discovered in southeastern Yunnan, China. Selaginella obovata is characterized by the prostrate habit and relatively small size of plant, obovate median
leaves, and short, dorsiventral strobili, and is not apparently similar to any known species. Phylogenetic analyses of plastid sequences (rbcL, atpI, psbA) indicated that S. obovata is closely allied to S. bisulcata, which is also supported by spore morphology,
and that these two taxa together with S. pennata constitute a well-supported monophyletic group. Selaginella zhangii is comparable to S. rolandi-principis in their broad stems and shape and arrangement of vegetative leaves; but the former differs from the latter in its
prostrate habit and dorsiventral strobili. The results of phylogenetic analyses indicated that S. zhangii is allied to S. heterostachys in the S. heterostachys‐S. ciliaris clade, while S. rolandi-principis is distantly placed in the S. doederleinii‐S.
involvens clade. Finally, we provide comprehensive descriptions, photographs of living plants, line drawings, and scanning electron micrographs of spores to facilitate their recognition.
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