Oberonia manipurensis sp. nov. (Orchidaceae) from Manipur,India

A new species Oberonia manipurensis Chowlu, Nanda, A. N. Rao, Angela, Bishwajit & Akimpou sp. nov. (Orchidaceae) is described from Manipur, India. It is closely allied to O. pachyphylla King & Pantl. but differs in longer inflorescence, bilaterally flattened to terete leaves, entire bract, subserrate petals and anther cap with obtuse front margin. The species is described in detail and illustrated with a colour plate. The chromosome number for the species is also reported: 2n = 36.     

Oberonia swaminathanii sp. nov. (Orchidaceae) from Kerala,India

Oberonia swaminathanii, a new species of Orchidaceae from Wayanad district, Kerala, India is described and illustrated. The new species resembles Oberonia balakrishnanii, O. chandrasekharanii and O. seidenfadeniana by its 3‐lobed labellum and 2‐lobuled midlobe; but differs in having brick‐red coloured flowers, triangular labellum disc, and a subglobose column.     

Liparis rubescens sp. nov. (Orchidaceae) from Thailand

In the context of an ongoing revision of the orchid genus Liparis in Thailand, we describe and illustrate a new species under the name L. rubescens Tetsana, H. A. Pedersen & Sridith. Morphologically, it is particularly similar to L. dumaguetensis Ames from the Philippines, but it differs in the shape of the lateral sepals and in several characters of the labellum. Among the Liparis species already known from Thailand, L. atrosanguinea Ridl. bears a certain resemblance to the new species, but not so much as to make misidentifications likely. So far, L. rubescens is only known from Khao Nan National Park in the southern Thai province of Nakhon Si Thammarat, but we suggest that it should also be searched for in other parts of peninsular Thailand, southernmost Myanmar and Peninsular Malaysia.     

Erratum to ‘Oberonia manipurensis sp. nov. (Orchidaceae) from Manipur,India’

The type citation of the validly published name Oberonia manipurensis Chowlu, Nanda, A. N. Rao, Angela, Bishwajit & Akimpou was imprecisely given in Chowlu et al. (2015) and is corrected here.     

Cheirostylis seidenfadeniana sp. nov. (Orchidaceae) from India

Cheirostylis seidenfadeniana is described from Kerala in India. The new species appears to be related to C. parvifolia and shares some characteristics with C. thailandica and C. montana , but differs in floral characters.     

Gastrodia sui sp. nov. (Orchidaceae) from Taiwan

A new orchid species, Gastrodia sui C. S. Leou, T. C. Hsu & C. L. Yeh is described and illustrated from Taiwan. The new species is closely related to G. callosa J. J. Sm. but distinguishable by the number and position of calli inside the perianth tube, the fused ratio of perianth lobes, and the structure of the lip and column. It is so far only found in the area of Mt Lilung in southern Taiwan.     

Neottia chandrae sp. nov. (Orchidaceae) from Nepal

Neottia chandrae B. B. Raskoti, J. J. Wood & Rita Ale sp. nov. is described and illustrated from Nepal. Notes on the diagnostic characters used to distinguish it from allied species are provided.     

Phyllanthus brunelii sp.nov. (Euphorbiaceae) from Thailand

Phyllanthus brunelii Roux, a new shrubby species from Thailand is described. P. brunelii has apparently until now been confused with P. reticulatus Poir. Its pollen structure suggests affinities between the subgenera Kirganelia (A. Juss.) Webster and Gomphidium (Baill.) Webster.     

Typhonium muaklekense sp. nov. (Araceae) from Thailand

Typhonium muaklekense D. Sookchaloem & S. Maneeanakekul is described and illustrated. This new species resembles T. roxburghii Schott and T. varians Hett. & Sookch. in the spathe. Drawings, photographs and a table comparing diagnostic features of T. muaklekense, T. roxburghii and T. varians are provided.     

Geostachys angustifolia sp. nov. (Zingiberaceae) from Thailand

A new species of Geostachys (Bak.) Ridl. is described, G. angustifolia K. Larsen sp. nov., and a key to all species of the genus found in Thailand, Cambodia and Vietnam is presented.     

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.     

Pseuderanthemum pubescens sp. nov. (Acanthaceae) from Thailand

Pseuderanthemum pubescens T. Choopan & P. J. Grote, a new species from southeastern Thailand is described and illustrated. It is distinguished from P. longistylum J. B. Imlay by leaves being pubescent instead of glabrous and by the corolla lobes being purple with reddish purple dots on all 5 lobes instead of dotted on lower lip only.     

Aristolochia helix sp.nov. (Aristolochiaceae) from Thailand

A new species of Aristolochiaceae, Aristolochia helix , is described from Thailand and contrasted to its nearest ally, A. arenicola.     

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.     

Dendrobium tamenglongense sp. nov. (Orchidaceae) from Manipur,India

Dendrobium tamenglongense R. Kishor, Y. N. Devi, H. B. Sharma, J. Tongbram & S. P. Vij sp. nov. from Manipur, India is described and illustrated as a new species. The new species differs from D. jaintianum in having larger and glabrous leaves with acute apices, green sepal apices, a 1–3‐flowered inflorescence, smaller and non‐fragrant flowers and a 3‐lobed labellum with fimbriate midlobe.     

Sarcoglyphis manipurensis sp. nov. (Orchidaceae) from Manipur,India

A new orchid species, viz. Sarcoglyphis manipurensis, is described and illustrated from Imphal east and Chandel districts of Manipur in northeast India. It's distinguishing characters and affinity with S. mirabilis (Rchb.f.) Garay is discussed. An updated artificial key to all known species of Sarcoglyphis is provided.     

Myoxanthus oliviae sp. nov. (Pleurothallidinae,Orchidaceae) from Peru

A new species of the orchid genus Myoxanthus, M. oliviae, is described based on Peruvian material. The novelty resembles M. serripetalus from which it differs by the 7–8‐veined lateral sepals (versus 6‐ or 9‐veined), the petals contracted below the apex and expanded again into a sagittate apex (versus apex caudate) and entire lip middle lobe (versus fimbriate). The flowers of M. oliviae are pale brownish‐purple, internally intensively suffused with yellow, dark‐purple spotted. The new species grows among rocks at the elevation of 2700–3100 m a.s.l. A key to Peruvian Myoxanthus representatives is provided.     

Microstylis schneideri sp. nov. (Orchidaceae,Epidendroideae) from Colombia

A new species of the genus Microstylis, M. schneideri is described and illustrated based on Colombian material. The taxonomic affinities of the new species are briefly discussed.