Hymenasplenium hastifolium sp. nov. (Aspleniaceae) from a karst cave in western Guangxi, China

Phytotaxa ◽  
2018 ◽  
Vol 333 (2) ◽  
pp. 281 ◽  
Author(s):  
KE-WANG XU ◽  
XIN-MAO ZHOU ◽  
LI-BING ZHANG ◽  
WEN-BO LIAO
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Karst Cave ◽  
Limestone Cave ◽  
Cave Entrance ◽  
Fern Species ◽  
Ca 50 ◽  
Iucn Red List Criteria

A new fern species, Hymenasplenium hastifolium (Aspleniaceae), from a limestone cave in western Guangxi, China, is described and illustrated. Morphological affinities of genus Hymenasplenium are also compared and discussed. The new species is distinguished by the shape of lamina, the venation, and the sorus distribution. Hymenasplenium hastifolium was found at a cave entrance and is currently known only from one population with ca. 50 individuals. It should be classified as Critically Endangered (CR) following IUCN Red List criteria.

Polystichum dongchuanense and P. menglaense (subg. Haplopolystichum; Dryopteridaceae), two new ferns from Yunnan, China

Phytotaxa ◽  
2021 ◽  
Vol 479 (1) ◽  
pp. 114-120
Author(s):  
ZHEN-LONG LIANG ◽  
ZHAO-RONG HE ◽  
LI-BING ZHANG
Keyword(s):  
New Species ◽  
Plant Size ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Fern Species ◽  
Iucn Red List Criteria

Two new fern species, Polystichum dongchuanense and P. menglaense (Dryopteridaceae), are described and illustrated from Yunnan, China. Both are members of P. subg. Haplopolystichum sect. Haplopolystichum. Polystichum dongchuanense is most similar to P. acutidens in plant size and pinna size, but the two can be distinguished from each other by pinna serration and soral number on pinnae. Polystichum menglaense is most similar to P. deltodon in plant size, but the two are different in pinna shape and soral distribution. Both new species have extremely narrow distributions and are classified as Critically Endangered (CR) following IUCN Red List Criteria.

Eight new species of the fern genus Polystichum (subg. Haplopolystichum; Dryopteridaceae) from limestone caves in Guizhou, China

Phytotaxa ◽  
2019 ◽  
Vol 404 (6) ◽  
pp. 209
Author(s):  
LI-BING ZHANG ◽  
YI-FAN DUAN ◽  
MATTHIAS KROPF
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Guizhou Province ◽  
Southwestern China ◽  
Fern Species ◽  
Iucn Red List Criteria

Eight new fern species of Polystichum subg. Haplopolystichum sect. Haplopolystichum (Dryopteridaceae) are described and illustrated from Guizhou Province, southwestern China. These eight species include P. anshunense, P. asperrimum, P. confusum, P. kropfii, P. libingii, P. macrodon, P. perditum, and P. yifanii. Each of these eight species was discovered from only 1–2 limestone caves showing extremely narrow distributions. Therefore, all are classified as Critically Endangered (CR) following IUCN Red List criteria.

Polystichum quangbinhense sp. nov. (subg. Haplopolystichum; Dryopteridaceae), the southernmost cave species of Polystichum from central Vietnam

Phytotaxa ◽  
2016 ◽  
Vol 283 (3) ◽  
pp. 295
Author(s):  
NGAN THI LU ◽  
LIANG ZHANG ◽  
DUNG THAI NGUYEN ◽  
LI-BING ZHANG
Keyword(s):  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Karst Cave ◽  
Central Vietnam ◽  
Fern Species ◽  
Iucn Red List Criteria ◽  
Two Sides ◽  
Two Populations

A new fern species, Polystichum quangbinhense, a member of P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Quang Binh Province in central Vietnam. It is the southernmost cave species of the genus discovered so far. Polystichum quangbinhense is most similar to P. obliquum in having oblong pinnae, but the two can be distinguished from each other by the morphology of pinna margins. Polystichum quangbinhense was found inside a karst cave at an elevation of 120 m with humid and shady conditions and is currently known from two populations occurring at two sides of the Doi Cave (So Dua Cave), Quang Binh Province, central Vietnam, and is classified as Critically Endangered (CR) following IUCN Red List criteria.

Polystichum hagiangense (subg. Haplopolystichum; Dryopteridaceae), a new fern species from Ha Giang Province, northern Vietnam

Phytotaxa ◽  
2014 ◽  
Vol 175 (5) ◽  
pp. 293 ◽  
Author(s):  
Ngan Thi Lu ◽  
Liang Zhang ◽  
Li-Bing Zhang
Keyword(s):  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Karst Cave ◽  
Light Conditions ◽  
Single Population ◽  
Northern Vietnam ◽  
Ecological Requirements ◽  
Fern Species ◽  
Iucn Red List Criteria

A new fern species, Polystichum hagiangense belonging to P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Ha Giang Province in northern Vietnam. Polystichum hagiangense is most similar to P. minutissimum by having a small habit (lamina 3.6–5.8 × 1.0–1.6 cm), but the former has the widest part of the lamina close to the base and ovate and larger pinnae (5.3–8.2 × 3.2–5.8 mm). In contrast, the latter has the widest part of the lamina above the middle and nearly rectangular and smaller pinnae (2.9−5.8 × 2.8−4.5 mm). Also, the two species have different ecological requirements. Polystichum hagiangense was found on limestone cliffs in forest at an elevation of 1290 m with dry and light conditions, while P. minutissimum grows on dripping limestone walls and stalactites inside a karst cave at an elevation of 750 m with humid and shady conditions. Polystichum hagiangense is currently known only from a single population occurring at Bat Dai Son community in Ha Giang Province, northern Vietnam, and would be classified as Critically Endangered (CR), following IUCN Red List criteria.

Polystichum zhijinense (subg. Haplopolystichum; Dryopteridaceae), a new cave species of Polystichum from Guizhou, China

Phytotaxa ◽  
2017 ◽  
Vol 331 (1) ◽  
pp. 124
Author(s):  
YI-FAN DUAN ◽  
MATTHIAS KROPF ◽  
LI-BING ZHANG
Keyword(s):  
Southwest China ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Guizhou Province ◽  
Cave Entrance ◽  
Fern Species ◽  
Iucn Red List Criteria

A new fern species, Polystichum zhijinense, a member of P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Guizhou Province in Southwest China. Polystichum zhijinense is somehow similar to P. fengshanense in having pinnae oblong and entire or shallowly repand (not aristate-spinulose on the margin), but differs in the shape of the pinna apex, the morphology of microscales, and the sorus distribution. Polystichum zhijinense was found at a cave entrance and is currently known from one population only and thus is classified as Critically Endangered (CR) following IUCN Red List criteria.

Seven new species of Polystichum (subg. Haplopolystichum; Dryopteridaceae) from southern China

Phytotaxa ◽  
2016 ◽  
Vol 280 (3) ◽  
pp. 201 ◽  
Author(s):  
MENG-QI HAN ◽  
YAN LIU ◽  
LI-BING ZHANG
Keyword(s):  
New Species ◽  
Southwest China ◽  
Southern China ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Fern Species ◽  
Iucn Red List Criteria

Seven new fern species of Polystichum subg. Haplopolystichum (Dryopteridaceae) are described and illustrated from Guizhou and Yunnan provinces, Southwest China. These seven species include P. arcuatum, P. multispinulosum, and P. paucicarpum from Guizhou, and P. crassirachis, P. membranifolium, P. paraobliquum, and P. serratissimum from Yunnan. Four of these seven species are described from limestone caves. All seven species have extremely narrow distributions and are classified as Critically Endangered (CR) following IUCN Red List criteria.

Eight new species of Polystichum (subg. Haplopolystichum; Dryopteridaceae) from limestone caves in Guangdong and Yunnan, China, with reference to species diversity in the karst terrains at high elevations in subtropical areas

Phytotaxa ◽  
2018 ◽  
Vol 365 (2) ◽  
pp. 145 ◽  
Author(s):  
MENG-QI HAN ◽  
YAN LIU ◽  
LI-BING ZHANG
Keyword(s):  
New Species ◽  
Species Diversity ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Southwestern China ◽  
Fern Species ◽  
Iucn Red List Criteria ◽  
Karst Terrains ◽  
High Elevations

Eight new fern species of Polystichum subg. Haplopolystichum (Dryopteridaceae) are described and illustrated from Guangdong and Yunnan provinces, southern and southwestern China, respectively. These eight species include P. deltatum, P. gejiuense, P. malipoense, P. oblongipinnarum, P. pingbianense, P. rectum, and P. superum from Yunnan, and P. hanmengqii from Guangdong. Four of the eight species are described from high elevations (around 2000 m) demonstrating that the limestone areas at high elevations in subtropical areas are species-rich and deserve special conservation attention. All eight species are so far known only from single caves; they are all classified as Critically Endangered (CR) following IUCN Red List criteria.

Selaginella daozhenensis (Selaginellaceae), a new lycophyte from a limestone cave in northern Guizhou, China

Phytotaxa ◽  
2015 ◽  
Vol 207 (2) ◽  
pp. 187 ◽  
Author(s):  
Qing-Wen Sun ◽  
Jun-Hua Zhao ◽  
Libing Zhang
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Leaf Lamina ◽  
Limestone Cave ◽  
Bluish Green ◽  
Iucn Red List Criteria ◽  
A New Species

Selaginella daozhenensis, a new species of the lycophyte genus Selaginella (Selaginellaceae) from a limestone cave in northern Guizhou, China is described and illustrated. The new species is morphologically most similar to S. labordei and S. sichuanica but is distinct by its leaves being bluish green when fresh, its median leaves having aristae as long as leaf lamina, and its lateral leaves being larger (3.5–5.0 × 1.7–2.5 mm). Selaginella daozhenensis is currently known only from a single limestone cave and is considered to be Critically Endangered (CR), based on IUCN Red List criteria. It is also argued that S. sichuanica, earlier wrongly synonymized with S. labordei in treatments of the genus, should be recognized.

Selaginella wangpeishanii (Selaginellaceae), a new lycophyte from a limestone cave in Guizhou, China

Phytotaxa ◽  
2014 ◽  
Vol 164 (3) ◽  
pp. 195 ◽  
Author(s):  
Li-Bing Zhang ◽  
Qing-Wen Sun ◽  
Hai He
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Single Population ◽  
Limestone Cave ◽  
Iucn Red List Criteria ◽  
A New Species

Selaginella wangpeishanii, a new species of the lycophyte genus Selaginella (Selaginellaceae) from a limestone cave in southern Guizhou, China is described and illustrated. The new species is different from any species in the genus known so far in China by having some ultimate branches bearing microphylls in ascending order of trophophylls, sporophylls or sporophyll-like microphylls, and trophophylls (TST arrangement of microphylls). Morphologically, S. wangpeishanii is most similar to S. gebaueriana, but is distinct by smaller plants and serrulate margins of lateral trophophylls. Selaginella wangpeishanii is currently known only from a single population and is considered to be Critically Endangered (CR), based on IUCN Red List criteria.

Polystichum clarinervium (subg. Haplopolystichum; Dryopteridaceae), a new fern from Emei shan, China

Phytotaxa ◽  
2016 ◽  
Vol 280 (3) ◽  
pp. 271
Author(s):  
CHUN-XIANG LI ◽  
NIKISHA R. PATEL ◽  
LI-BING ZHANG
Keyword(s):  
New Species ◽  
Southwest China ◽  
Iucn Red List ◽  
Sichuan Province ◽  
Red List ◽  
Critically Endangered ◽  
Small Populations ◽  
Fern Species ◽  
Iucn Red List Criteria

A new fern species, Polystichum clarinervium, a member of P. subg. Haplopolystichum (Dryopteridaceae), is described and illustrated from Emei shan, Sichuan Province, Southwest China. The new species is similar to P. deltodon, but the former has pinnae slightly imbricate, pinna apex rounded, and veins clear, while the latter has pinnae not imbricate, pinna apex acute, and veins obscured. Polystichum clarinervium was found on a limestone slope under sparse forest at an elevation of 1300 m and is currently known from two small populations. It is classified as Critically Endangered (CR) following IUCN Red List criteria.

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