Shi-Yong Dong

South China Botanical Garden, Chinese Academy of Sciences · Center of Plant Science

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 1 ndhF-trnN, rbcL, rps16-matK 1 matK, and trnL-F), with a particular focus on the species fr...

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 observati...

We provide an annotated checklist of all known lycophytes and ferns in the Solomon Islands following an updated classification. It comprises two classes, 12 orders, 3 families, 122 genera, 449 species, and six infraspecific taxa, including 1 new species described here and 18 species newly recorded for the country. In addition, we make six new nomen...

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-...

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 plasti...

Bangladesh lies in Indian subcontinent, an area rich in Pteris species. However, so far there is no modern account on the species diversity of Pteris in Bangladesh. Based on a thorough study of literature and limited specimens available to us, we currently recognize 15 species of Pteris in Bangladesh. Among these species, P. giasii is currently kno...

During the course of sorting out the species of Tectaria Cavanilles (1799: 115, Tectariaceae) in Indochina, I noticed that Tectaria pentagonalis (Phan 2001: 1024) has not validly published. Tectaria pentagonalis seems to be an inadvertent combination, because Phan (2001) did not provide authorship of T. pentagonalis when he made such a combination....

Gymnosphaera represents a minor lineage within the scaly tree‐fern family Cyatheaceae. Tropical and subtropical mainland Asia is a main distribution area of Gymnosphaera. However, the species diversity of Gymnosphaera is currently incompletely known in mainland Asia due to lacking critical revision. Here we present new findings of species diversity...

A synopsis of Cyatheaceae from Myanmar is presented for the first time. The classification of four genera in Cyatheaceae is applied and 10 species in three genera are tentatively recognized in Myanmar based on herbarium collections and previous reports. Of the 10 recognized species, Gymnosphaera henryi and G. podophylla are confirmed for the first...

The scaly tree fern widely accepted as Gymnosphaera gigantea in China is demonstrated to be a separate species, G. henryi. Our field observations show that G. henryi is a good species and is readily recognized by the combination of stipe bearing 2-rowed scales throughout, pinnae being sessile, and most or at least lower pinnae being opposite on rac...

Hybridization in plants may result in hybrid speciation or introgression and, thus, is now widely understood to be an important mechanism of species diversity on an evolutionary time scale. Hybridization is particularly common in ferns, as is polyploidy, which often results from hybrid crosses. Nevertheless, hybrid speciation as an evolutionary pro...

A critical revision of Tectaria (Tectariaceae) from Bangladesh is presented here for the first time based on herbarium collections and field surveys. Eleven species are recognized in Bangladesh, including two narrowly distributed species (T. chattagramica and T. heterocarpa) and nine E & SE Asia-widespread species (T. decurrens, T. fuscipes, T. her...

A new species of Bolbitis , B. lianhuachihensissp. nov. , was found in central Taiwan. It most resembles B. virens var. compacta and B. hainanensis . A phylogenetic tree of Taiwanese and other Asian species of Bolbitis species supports the recognition of the new species. Morphologically, the combination of anastomosing venation and fewer sterile pi...

A taxonomic revision of Tectaria from New Caledonia is presented here based on a thorough study of herbarium specimens from New Caledonia and adjacent Pacific islands. Six species of Tectaria are presently recognized in New Caledonia. Tectaria kouniensis and T. pseudosinuata are reduced to T. dissecta and T. sinuata, respectively. The morphological...

The genus Gymnosphaera was originally established by Blume (1828) for two tree ferns from Java, Indonesia with naked sori and globular receptacles. It was emended by Copeland (1947) to contain tree ferns characterized by dark axes and exindusiate sori which were dorsal on simple veinlets. Holttum (1963) argued to adopt only one genus, Cyathea Smith...

Tectaria chinensis is a poorly known species from China, with its type being the sole authentic voucher to date. Recent field observations and morphological comparisons reveal its type being an incomplete frond, which resulted in the constant misinterpretation of some morphological characters and the allied species to T. chinensis. In fact, T. chin...

The taxonomic subdivision of Cyatheaceae, a family containing over 600 species of scaly tree ferns, has troubled pteridologists for more than one century. Recent molecular analyses have revealed four monophyletic groups (Alsophila R. Br., Cyathea Sm., Gymnosphaera Blume, and Sphaeropteris Bernh.) within this family. However, one of the four groups,...

The fern genus Tectaria (Tectariaceae) is morphologically diverse and difficult in terms of recognizing species and species groups. To infer the systematic positions of some species and identity-unknown collections with special morphological characters, we conducted phylogenetic analyses based on sequences of five plastid regions (atpB, ndhF plus n...

The misapplication of the name Tectaria subsageniacea or Ctenitopsis subsageniacea, is corrected here. The nomenclature type of these names is an individual of T. fuscipes and the plants which have long been referred to as C. subsageniacea or T. subsageniacea in China should be named T. austrosinensis. A lectotype is designated for T. austrosinensi...

In 2008, the Ministry of Environmental Protec-tion (MEP) in co-operation with Chinese Academy of Sciences (CAS) initiated work on a comprehensive new edition of the Red List of the Chinese flora. The project, named China Biodiversity Red List—Higher Plants, extended to 2013. We assessed the threatened status of all known species of higher plants in...

To understand the extinction risk of lycophytes and ferns in China, we conducted an evaluation of the two groups according to IUCN Red List Categories and Criteria (version 3.1) at the national level. During a period of 16 months, a group of three researchers evaluated each taxon by means of reading literature, checking herbarium specimens, and con...

To determine the taxonomic identities and the systematic positions of some collections of Lindsaea sect. Synaphlebium (Lindsaeaceae) from Papua New Guinea, we conducted morphological comparisons and phylogenetic analyses on the whole section. A total of 22 morphological characters were selected and coded for each of all known taxa in L. sect. Synap...

Alignment matrix of combined trnL-trnF intergenic spacer and trnH-psbA intergenic spacer of 37 samples used to infer the phylogeny presented in Fig 6. (TXT)

Morphological data matrix of Lindsaea species with anastomosing veins and dimidiate pinnules. (DOCX)

A new natural hybrid, Tectaria × hongkongensis (Tectariaceae), is described and illustrated from Hong Kong, China. It is a sterile hybrid supported by the abortive spores and cytological data [2n = 120 (3x)]. This hybrid is morphologically somewhat similar to T. zeilanica in the small size of plants, strongly dimorphic leaves, the shape of sterile...

Dryopteris subgenus Nothoperanema (Dryopteridaceae) includes sections Acrophorus, Diacalpe, Nothoperanema, and Peranema. Phylogenetic relationships among these sections and their relationship to sect. Dryopsis (genus Dryopteris subgenus Erythrovariae, Dryopteridaceae) are unclear. Additionally, previous phylogenetic work has not included Stenolepia...

The species Tectaria nesiotica Holttum, described from New Guinea, is confirmed to be a member of the genus Pleocnemia and thus a new combination, P. nesiotica, is proposed here. It superficially resembles some species of Tectaria with large, finely dissected fronds and with veins anastomosing only along costae but differs in venation pattern. With...

Based on recent molecular data and morphology, here I propose eight new combinations and five new names to accommodate the species of Heterogonium in Tectaria.

The misapplication of the name Tectaria griffithii is corrected, which results in the revival of T. multicaudata and the proposal of a new combination (T. multicaudata var. amplissima) and two new synonyms (T. yunnanensis and T. multicaudata var. singaporeana). For the reduction of Psomiocarpa and Tectaridium (previously monotypic genera) into Tect...

Plants mostly terrestrial or epilithic, some epiphytic, rarely aquatic (Ceratopteris), small to large. Rhizomes erect, ascending, or creeping, siphonostelic, solenostelic, or dictyostelic, usually scaly, rarely with bristles; scales brown or black, sometimes clathrate and iridescent, lanceolate to cordate, sometimes peltate, margin usually entire....

This is the Pteridaceae treatment from the pteridophyte portion of the Flora of China sereis (Vol. 2+3). Individual family treatments from this project may be downloaded as pdf files at: http://flora.huh.harvard.edu/china/mss/treatments.htm.

PDF version does not have an ISBN or ISSN and is not therefore effectively published (Melbourne Code, Art. 29.1). The printed version, however, was effectively published on 6 June 2013. Plants terrestrial, 10–300 cm tall. Rhizome erect or ascending to creeping, short or long, stout or slender, scaly at apex; rhizome and basal stipe scales brown, li...

The Pteris cadieri complex displays extensive morphological variation and seems to have originated through hybridization. However, the members of this complex reproduce by apogamy, which usually limits genetic variation. To evaluate the hypotheses of hybrid origins, the pattern of evolution in this species complex is reconstructed. Multiple methodo...

A new species, Asplenium riswanii (sect. Thamnopteris), is described from Central Java and West Papua, Indonesia. It is distinct from any known species by having thick and rigid fronds, abaxially keeled midribs, broadly lanceolate scales, and distantly spaced sori. Morphologically, A. riswanii is not similar to any species from Malesia but somewhat...

Background The fern genus Dryopteris (Dryopteridaceae) is among the most common and species rich fern genera in temperate forests in the northern hemisphere containing 225–300 species worldwide. The circumscription of Dryopteris has been controversial and various related genera have, over the time, been included in and excluded from Dryopteris. The...

Asplenium sect. Thamnopteris is a morphologically distinct group within Asplenium, however, the species delimitation within the section is difficult. To evaluate the utility of spore morphology in the taxonomy of Asplenium sect. Thamnopteris, we examined 64 samples representing ca 25 species using scanning electron microscopy. The results show that...

Dryopsis clarkei (Baker) Holttum & P.J. Edwards, representing the whole genus, is reported new to Vietnam. A detailed description, including the variation of gross morphology, spore morphology, and chromosome counts, is provided by means of words as well as photographs or drawings. Dryopsis clarkei is for the first time demonstrated to be a sexual...

The section Thamnopteris is morphologically distinct among the large fern genus Asplenium, but the species recognition within this section is very difficult. To understand the species concept of this section from a cytological view, I examined chromosome numbers of fifteen samples representing eight taxa (species and intraspecific taxa). As result,...

The nomenclature related to Tectaria subpedata (Harr.) Ching (Tectariaceae) is clarified. The misidentification of T. subpedata is documented by a comprehensive study of herbarium specimens, wild and cultivated plants, spore morphology, gametophyte development, and chromosome count. The type of T. subpedata is confirmed to be a young frond of T. po...

Dong, S. Y. 2009: Hainan tree ferns (Cyatheaceae): morphological, ecological and phytogeo-graphical observations. — Ann. Bot. Fennici 46: 381–388. Based on extensive field surveys and studies of numerous herbarium collections, a taxonomic revision on the tree ferns (Cyatheaceae) from Hainan Island, South China is made. Some formerly used diagnostic...

In preparation for the forthcoming Flora of China, volume 3, the new combination Ctenitis dianguiensis (W. M. Chu & H. G. Zhou) S. Y. Dong based on Ataxipteris dianguiensis W. M. Chu & H. G. Zhou (Pteridophyta, Dryopteriaceae) is proposed. In addition, seven scientific names synonymize to C. subglandulosa (Hance) Ching, of which three are new: C. m...

In preparation for the forthcoming Flora of China, volume 3, the new combination Ctenitis dianguiensis (W.M. Chu & H. G. Zhou) S. Y. Dong based on Ataxipteris dianguiensis W. M. Chu & H. G. Zhou (Pteridophyta, Dryopteriaceae) is proposed. In addition, seven scientific names synonymize to C. subglandulosa (Hance) Ching, of which three are new: C. ma...

Tectariaceae are a pantropical fern family of about 20 genera, among which 8 are distributed in China. The morphological distinctiveness of the family is widely recognized, yet relatively little systematic research has been conducted on members of Tectariaceae. Phylogenetic analyses of chloroplast DNA sequence data (rbcL and atpB) from 15 species r...

The genus Lindsaea Dryand. from the Hainan Island, China, is taxonomically revised based on extensive field observations, herbarium studies and SEM photographs of spore samples. Eleven species and one variety of the genus Lindsaea are recognized, of which L. chingii C. Chr. is a new record to the Hainan Island. L. chienii Ching and L. orbiculata (L...

having 10 to 12 pairs of pinnae in mature bathyphylls and the scales of sterile pinnae on both midribs and veinlets as substellate, appressed, and small, with diameters only to ca. 0.2 mm. The ge-nus Teratophyllum itself is reported from China for the first time. Teratophyllum Kuhn is confined to the Paleo-tropics and comprises 12 species (Holttum,...

Ataxipteris dianguiensis W. M. Chu & H. G. Zhou and Tectaria polymorpha (Wall. ex Hook.) Copel. are reported as new records to Hainan Island, China; T. polymorpha var. subcuneata Ching & Chu H. Wang is reduced to synonymy of T. polymorpha (Wall. ex Hook.) Copel. The morphological variation of T. subtriphylla (Hook. & Arn.) Copel. and the difference...

A taxonomic study of six species of Sinopteridaceae was made with notes on taxonomy, ecology and distribution. Phytogeographically, the species of Sinopteridaceae in Hainan Island is closely related to that of Taiwan. Four species of the genus Ctenitopsis (Tectariaceae) are enumerated from Hainan Island, based on examination of the important collec...