Search

Three new species of Polystichum (Dryopteridaceae), P. paramartini R. H. Jiang et X. C. Zhang, P.sublanceolatum R. H. Jiang et X. C. Zhang, and P. venosum R. H. Jiang et X. C. Zhang, are described and illustrated. They are all from the limestone mountains in South and Southwest China. The first two species are found in limestone caves while the third one occurs on limestone mountain slopes. Detailed descriptions, line drawings, ecological preferences, conservation status are provided., Сообщается о трех новых для науки видах Polystichum (Dryopteridaceae) – P. paramartini R. H. Jiang et X. C. Zhang, P. sublanceolatum R. H. Jiang et X. C. Zhang и P. venosum R. H. Jiang et X. C. Zhang, найденных в карстовых горных районах на юго-западе Китая. Первые два вида встречаются в известняковых пещерах, а последний – в известняковых горах. Приводятся подробные морфологические описания, изображения, экологическая приуроченность, охранный статус, а также даны сравнительные характеристики с близкородственными видами.

Based on morphological study, two new species of the lycophyte genus Phlegmariurus Holub, P. yunfengii R.-H. Jiang et X.-C. Zhang and P. shingianus R.-H. Jiang et X.-C. Zhang from China are described and illustrated. Detailed description, ecology, distribution, conservation status as well as a comparison with morphologically similar species are provided., На основе морфологического исследования описаны из Китая два новых вида плауновидных из рода Phlegmariurus Holub: P. yunfengii R.-H. Jiang et X.-C. Zhang и P. shingianus R.-H. Jiang et X.-C. Zhang. Представлены морфологические описания, иллюстрации, охарактеризованы экология, распространение, охранный статус видов, а также дано морфологическое сравнение с близкими видами.

Phlegmariurus (Herter) Holub is the largest genus of Lycopodiaceae, with about 250 species distributed in the tropics and subtropics of the world. Phlegmariurus phlegmaria is the representative species of Phlegmariurus. In this study, we reported the complete chloroplast genome of P. phlegmaria. This complete chloroplast genome is 1,49,711 bp in size. In total, 134 genes were identified, including 84 protein-coding genes, 42 tRNA genes, and eight rRNA genes. In phylogenetic analysis, a close relationship with genus Huperzia was supported by maximum-likelihood (ML) tree. The complete plastome of P. phlegmaria will provide potential genetic resources to understand the evolution of lycophytes.

N/A

Phlegmariurus (Herter) Holub is the largest genus of Lycopodiaceae, with about 250 species distributed in the tropics and subtropics of the world. Phlegmariurus phlegmaria is the representative species of Phlegmariurus. In this study, we reported the complete chloroplast genome of P. phlegmaria. This complete chloroplast genome is 1,49,711 bp in size. In total, 134 genes were identified, including 84 protein-coding genes, 42 tRNA genes, and eight rRNA genes. In phylogenetic analysis, a close relationship with genus Huperzia was supported by maximum-likelihood (ML) tree. The complete plastome of P. phlegmaria will provide potential genetic resources to understand the evolution of lycophytes.

Abies yuanbaoshanensis is critically endangered and endemic to Guangxi province of China, with no more than 900 surviving individuals. In this study, we reported the complete chloroplast (cp) genome of A. yuanbaoshanensis. The complete chloroplast genome is 121897 bp in size. In total, 112 genes were identified, including 74 protein-coding genes, 34tRNA genes, and four rRNA genes. In phylogenetic analysis, the tree supported the monophyly of the genus Abies. The complete plastome of A. yuanbaoshanensis will provide potential genetic resources for further conservation and evolutionary studies of this highly endangered species.

Pteris kawabatae Sa. Kurata was regarded as endemic to Japan. We here report its new distribution in China, Taiwan, and Vietnam. We also re-circumscribe P. arisanensis as an independent species and propose its Chinese name herein. A key is provided to compare those morphologically similar Pteris species in Taiwan, including P. arisanensis, P. biaurita, P. fauriei, P. linearis, P. kawabatae and P. wulaiensis.

We inferred the classification of the Paleotropical climbing fern genus Arthropteris and its close relative Psammio­ sorus, a monotypic genus endemic to Madagascar. The classification of these ferns has until now been poorly understood. To address this, we sampled more than half of the species diversity covering the whole range of the genus including the outlying occurrence at the Juan Fernandez Islands. To reconstruct phylogenetic relationships, we obtained DNA sequences from up to six plastid genome regions, including coding and non-coding regions, for these two genera and representatives of all fami- lies of the eupolypod I clade, with an emphasis on the Tectariaceae. These data were analyzed using maximum parsimony, maximum likelihood, and Bayesian inference. We also obtained divergence time estimates. Three questions were addressed. (1) We established that Arthropteris and Psammiosorus form a well-supported clade representing a separate taxon based on their morphological distinctiveness, phylogenetic relationships, and separation since the Eocene from other accepted families of eupolypod ferns. (2) Psammiosorus was found to be nested within Arthropteris. (3) Our analyses supported recognition of a previously doubted species endemic to the karst regions of southern China and northern Vietnam. As a consequence of our results, we describe the new family Arthropteridaceae and introduce the new combination Arthropteris paucivenia for the Madagascan endemic previously treated under Psammiosorus.

Asplenium cornutissimum, a new species from Guangxi, southern China, is described, illustrated, and compared to three similar species: A. pulcherrimum, A. coenobiale, and A. tenuifolium. So far, the new species is known only from the limestone region in southern Guangxi, from 750–825 m. It grows exclusively in karst caves.

Ophiopogon yangshuoensis R.H. Jiang & W.B. Xu (Asparagaceae), a new species from limestone areas in Guangxi, China, is described and illustrated. It is similar to O. intermedius, but differs by its abaxially glaucous leaves, white streaked, broadlanceolate or ovate-lanceolate bracts, narrow-lanceolate innermost bracts, and ovate, reflexed tepals.