Piper viridescens sp. nov. (Piperaceae) from Thailand

Piper viridescens sp. nov. is proposed based on material from northern Thailand. The new species is described and illustrated, resulting from a revision of the genus in Thailand. The new species is most closely related to P. boehmeriifolium (Miq.) C. DC. A table comparing diagnostic features of P. viridescens, P. boehmeriifolium and P. retrofractum is provided.     

New species of Ophiopogon,Peliosanthes and Tupistra (Asparagaceae s.l.) in the flora of Vietnam

Five new species named Peliosanthes aperta, P. elegans, P. kenhillii, Tupistra densiflora and T. patula are described and illustrated. These species are very local in distribution and endemic to northern or southern Vietnam. Two other species, Ophiopogon ogisui and Peliosanthes griffithii, are recorded as new to the flora of Vietnam. A key to the species of Tupistra occurring in Indochina and its neighboring regions is also provided.     

Potentilla jiaozishanensis sp. nov. (sect. Leptostylae,Rosaceae) from southwest China

Potentilla jiaozishanensis, a distinct new species of Rosaceae from Yunnan, China, is described and illustrated. Morphologically, it is closely related to P. stenophylla var. stenophylla but clearly differs from the latter by its bidentate leaflets, lanceolate epicalyx‐segments that are longer than the sepals, villose ovaries and achenes. Moreover, the pollen grains of P. jiaozishanensis are markedly different from those of P. stenophylla var. stenophylla in size and shape. The newly described species is endemic to the Jiaozishan Mountains, southwest China.     

Parietaria taiwania sp. nov. (Urticaceae) from Taiwan

A new species of Urticaceae, Parietaria taiwania C. L. Yeh & C. S. Leou is described and illustrated. The new species is related to P. micrantha Ledebour, but can be distinguished from it by being a perennial herb with climbing or pendulous stems, leaves that are sparsely pubescent on the adaxial side, unisexual flowers, male flowers without bracts and female flowers with a bract. This is the first record of a species of Parietaria in Taiwan.     

Pothos vietnamensis sp. nov. (Araceae–Pothoideae–Potheae) from Vietnam

Pothos vietnamensis V. D. Nguyen & P. C. Boyce is described and illustrated from northern Vietnam as a new species of the Pothos supergroup, and it is compared with the two most similar species: P. kerrii and P. pilulifer to which P. vietnamensis is comparable by having a very small fertile portion (< 5 mm diameter) on the spadix. Ecology, habitat, population size and conservation status are also discussed.     

Pogostemon nudus sp. nov. (Lamiaceae) from Thailand

A new species of Pogostemon Desf., P. nudus Bongcheewin & Pramali, is described, illustrated and compared with the similar P. menthoides from Thailand. Morphological characters, especially the micromorphology of nutlets and leaf epidermis, and conservation status in accordance with the IUCN red list categories and criteria are described and discussed. In addition, a key to all species of P. sect. Pogostemon known from Thailand is presented.     

Primula vallicola sp. nov. (Primulaceae) from Sichuan,China

A new species of Primula, P. vallicola Y. Xu, G. Hao & C.M. Hu, is described and illustrated from Sichuan province, China. Based on general morphology the new species is assigned to Primula sect. Aleuritia subsect. Yunnanensis. It is closely allied to P. kialensis, but can be distinguished by its larger stature, leaf shape, and the well‐differentiated petiole. The leaf shape of the new species is ovate to ovate‐elliptic and usually sub‐rounded at base. The new species also resembles P. homogama, but differs in being glabrous rather than with appressed hairs, and with longer petiole.     

Cranichis badia,C. brevirostris and C. silvicola spp. nov. (Orchidaceae,Cranichidinae) from Colombia and Venezuela

Three new species of the genus Cranichis first recognized by Jany Renz but never published, C. badia, C. brevirostris and C. silvicola, are described and illustrated. Information about their ecology and distribution is provided together with a brief discussion on their related species.     

Polygonum melihae sp. nov. (Polygonaceae) from inner west Anatolia,Turkey

Polygonum melihae Gemici & Kit Tan sp. nov. (Polygonaceae), a local endemic of inner west Anatolia is described as a species new to science and illustrated by photographs. The closest affinities are with P. afyonicum and P. setosum. Morphological characteristics and information about ecology and distribution are provided and the three taxa are compared. Dissimilarities with two Greek endemics, P. papillosum and P. idaeum, are also mentioned.     

Psydrax multiflora sp. nov. (Rubiaceae) from Palawan,Philippines

Psydrax multiflora, a new species of Vanguerieae collected in the Palawan, Luzon Island, Philippines is herein described and illustrated. Morphological observation showed that P. multilfora approaches three Malesian Psydrax species, namely P. amplifolia, P. nitida and P. puberula. However, P. multiflora can be delineated from these three by its caudate leaf apex, 20–30‐flowered umbellate inflorescences and broadly triangular corolla lobes.     

Bryophytes of St Helena,South Atlantic Ocean. 1. Three new species of Cololejeunea (Jungermanniales,Lejeuneaceae), C. dianae sp. nov., C. sanctae-helenae sp. nov. and C. grossestyla sp. nov.

Abstract

Three new species of Cololejeunea, C. dianae M. Wigginton, C. sanctae-helenae M. Wigginton and C. grossestyla M. Wigginton are described and illustrated from St Helena, South Atlantic Ocean. Details of their distributions are provided, and differences between the new taxa and other species of Cololejeunea are discussed. This is also the first report of the genus Cololejeunea from St Helena.     

Primulina curvituba sp. nov. (Gesneriaceae) from a limestone area in Guangxi,China

Primulina curvituba B. Pan, L.H. Yang & M. Kang, a new species of Primulina (Gesneriaceae) from Guangxi, China, is described and illustrated. This new species is mainly diagnosed by its strongly curved corolla tube, which is a rare character in Primulina. The morphological relationship and differences between this species and its related congeners are discussed. The conservation status of P. curvituba is assessed as ‘Critically Endangered’ (CR) according to IUCN.     

Primulina rubella sp. nov. (Gesneriaceae) from a limestone area in Guangdong,China

A new species of Primulina (Gesneriaceae) from a limestone area in southern China, P. rubella L.H. Yang & M. Kang, is described and illustrated. The new species has purple‐red flowers and is thus similar to P. lijiangensis, but differs by its petiole, leaf blade, cyme, filament, stigma and ovary. In adition, a molecular phylogenetic reconstruction indicated that P. rubella and P. lijiangensis belong to quite different clades. Instead, P. rubella appears to be closely related to the sympatric P. qingyuanensis, although these two species are obviously differentiated both in terms of flower color and other vegetative and floral characters. The conservation status of P. rubella is assessed as ‘Critically Endangered’ (CR) according to the IUCN red list categories and criteria.     

Campylocentrum guarinae sp. nov. (Vandeae,Orchidaceae) from Colombia

A new species of Campylocentrum from the Colombian Andes, C. guarinae, is described, illustrated and placed within a key to Colombian species of the genus. The new species resembles C. lansbergii from which it differs in vegetative and floral characters. The main differences between these species are described and illustrated.     

Polyporus phyllostachydis sp. nov. with notes on other rhizophilic species of Polyporus (Basidiomycota,Polyporaceae)

Polyporus phyllostachydis is described and illustrated as a new species. This species is characterized by its occurrence on bamboo roots, the small and centrally stipitate basidiocarps, the white pileus, usually becoming darker from the center at maturity, and the cylindrical stipe with a distinct crust. Morphological characters of the present species were compared with those of P. cryptopus and P. rhizophilus, other rhizophilic species of the genus. Polyporus cryptopus and P. rhizophilus are morphologically distinct by contextual texture, basidiospores, and hyphae, and possibly represent two distinct species. Contribution no. 205, Laboratory of Plant Parasitic Mycology, Graduate School of Life and Environmental Sciences, University of Tsukuba, Japan     

Studies on Schismatoglottideae (Araceae) of Borneo LV: Schismatoglottis saafiei and Schismatoglottis zainuddinii spp. nov. from Tawau Hills,Sabah

Schismatoglottis saafiei Kartini, P. C. Boyce & S. Y. Wong and Schismatoglottis zainuddinii Kartini, P. C. Boyce & S. Y. Wong are described and illustrated as new species from Tawau Hills N.P., Sabah, Malaysian Borneo. Schismatoglottis zainuddinii is the first record of the Schismatoglottis Asperata clade for Sabah. Schismatoglottis saafiei belongs to a complex of species centred on S. trifasciata Hallier.f.     

Plagiomnium guizhouense Y.-J.Yi & S.He sp. nov. (Mniaceae) found in southwestern China

A new species of Plagiomnium (Mniaceae), P. guizhouense Y.-J.Yi & S.He from Guizhou, China is described and illustrated. The new species is similar to P. affine in having spinosely serrate leaf margins with teeth consisting of up to 4 or more cells, a broadly elliptic leaf shape, and a decurrent leaf base, but is distinguished from the latter species by having a cuspidate leaf apex, broader marginal differentiation with borders consisting of 4–5 rows of linear, thick-walled cells, strongly ciliate marginal teeth that are sometimes branched and up to 7 cells long in upper fertile stem leaves and perichaetial leaves, and a much shorter leaf costa that ends just above mid-leaf in the lower leaves.