taxonID	type	description	language	source
795AA3DAA5C75522A7DF5B43DCF792E9.taxon	materials_examined	Type. INDIA. West Kameng Distinct, tropical rain forest, about 150 m a. s. l., epiphytic on tree trunks. A. N. Rao 24220 (holotype: Orchid Herbarium, Tipi!)	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
795AA3DAA5C75522A7DF5B43DCF792E9.taxon	description	Description. Epiphytic herbs. Stem, erect, 4.0 cm long and 1.0 cm in diameter, with 3 - 4 leaves. Leaves nearly basal, distichous, oblong, 8.0 - 15.0 x 1.7 - 2.3 cm, slightly fleshy or leathery, apex obtuse and unequally 2 - lobed. 1 - 4 inflorescences from base of stem, sub-umbellate, often 8 - 10 - flowered; peduncle straight, 1 - 2 cm, stout, with 2 cupular sheaths. Flower yellow or yellow green, with dark brown or purplish spots. Sepals similar, oblanceolate, 6.8 - 7.0 x 3.2 - 3.5 mm, base contracted, apex obtuse. Petals oblanceolate, 6.2 - 6.5 x 2.3 - 2.5 mm, apex obtuse. Lip with an epichile and a saccate hypochile; epichile triangular, 2.5 - 3.0 x 5.4 - 6.0 mm, fleshy, adaxially glabrous, with a central cushion, margin irregularly fimbriate or erose, apex rounded; hypochile cupular, ca. 6 mm tall, ca. 4 mm in diameter, white tinged with pale yellow at bottom, outside with 3 ridges. Column ca. 4 mm, stout; rostellum deeply 2 - lobed; pollinia 2, ca. 1.0 mm in diam.; stipe elongate, ca. 2.0 mm; anther cap nearly subglobose, apex narrowed into a beak. Fruit cylindrical, ridged, 5 - 6 cm in length, 1.2 - 1.4 cm in diameter.	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
795AA3DAA5C75522A7DF5B43DCF792E9.taxon	distribution	Distribution and habitat. Gastrochilus arunachalensis is previously known only from India and this is the first record from Myanmar (Putao county, Kachin state). It is epiphytic on the trunk of riparian trees in tropical rainforest in Myanmar or mixed deciduous tropical forest in India.	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
795AA3DAA5C75522A7DF5B43DCF792E9.taxon	materials_examined	Additional specimens examined. MYANMAR. Kachin State. Putao County, Wasadam village, tropical forest, 750 m a. s. l., epiphyte on the trunk of riparian trees, 14 Sep 2016, Qiang Liu 408 (HITBC!). Kachin State. Putao County, Malirun village, tropical forest, 600 m a. s. l., epiphyte on the trunk of riparian trees, 29 Nov 2017, Yun-Hong Tan M 2965 (HITBC!).	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
0D30E0A88B7B57989BBA9AC0F91ED2E2.taxon	materials_examined	Type. INDIA. Jalapahar, Darjeeling (West Bengal), about 2200 m a. s. l., epiphytic on tree trunks. 29 Oct 1982, A. P. Das 823 (holotype: CAL!)	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
0D30E0A88B7B57989BBA9AC0F91ED2E2.taxon	description	Description. Epiphytic pendulous herb. Stem often branched, pendulous and usually 8.0 - 15.0 cm long with 0.4 - 0.5 cm internodes. Leaves distichous, blade oblong or falcate-lanceolate, 2.0 - 4.0 x 0.4 - 0.9 cm, apex acute and unequally 2 - lobed. Inflorescence corymb, 4 - 6 - flowered; peduncle 1.2 - 1.3 cm, upper part broader, lower part with 2 cupular sheaths with purple-red spots; floral bracts ovate-triangular, ca. 3.0, membranous; pedicle and ovary yellow-green with purple-red spots, 1.0 - 1.2 cm long. Flowers yellowish or yellow, with purple blotches; epichile of lip white with sparse purple spots. Dorsal sepal oblong-elliptic, concave, 5.0 - 6.5 x 3.6 - 4.5 mm, apex obtuse; lateral sepal similar to dorsal sepal, 6.2 - 6.5 x 3.2 - 4.0 mm, apex obtuse; petals sub-obovate, 5.5 - 6.5 x 3.5 - 4.2 mm, apex rounded. Lip with distinct partition between wide epichile and a saccate hypochile; epichile reniform, 4.0 - 4.9 x 8.0 - 9.0 mm, adaxially glabrous, with a slightly diamond-shaped central cushion covered with small brown spots and 2 conic calli near base, margin entire or slightly denticulate, emarginate at apex; hypochile cupular, laterally compressed, 7.2 - 7.8 mm tall, 5.8 - 6.2 mm in diameter, apex rounded. Column stout densely with purple spots, ca. 2 mm; anther cap galeate with recurved acuminate apex, 2.0 x 2.2 mm; pollinia 2, ca. 1.0 mm in diam.; stipe elongate, ca. 2.0 mm; rostellum bilobed with acuminate apex. Capsules cylindrical with 3 ridges, ca. 2.0 x 1.2 cm.	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
0D30E0A88B7B57989BBA9AC0F91ED2E2.taxon	distribution	Distribution and habitat. Gastrochilus corymbosus is previously only known from the India and this is the first time that it has been recorded in the Natma Taung (Mt. Victoria) National Park, Chin State, Myanmar. It was found growing as an epiphyte on the tree trunks in a Rhododendron forest, which is dominated by Rhododendron protistum var. giganteum (Forrest) D. F. Chamberlain.	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
0D30E0A88B7B57989BBA9AC0F91ED2E2.taxon	materials_examined	Additional specimens examined. MYANMAR. Chin State. Natma Taung (Mt. Victoria) National Park, 2750 m a. s. l., epiphyte on the trunk of Alpine Rhododendron forests, 9 Jan 2017, Qiang Liu 414 (HITBC!). Natma Taung (Mt. Victoria) National Park, 2900 m a. s. l., epiphyte on the trunk of Alpine Rhododendron forests, 30 Apr 2017, Yun-Hong Tan M 1271 (HITBC!).	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
BDDBE059794C56D1B8DC09F6F985599B.taxon	materials_examined	Type. MYANMAR. s. coll., s. n. (Holotype: K!)	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
BDDBE059794C56D1B8DC09F6F985599B.taxon	description	Description. Epiphytic herbs. Stem 1.0 - 1.5 cm, stout, with 4 - 5 leaves. Leaves nearly basal, distichous, oblong, 15 - 20 x 3.5 - 4.5 cm, slightly fleshy or leathery, apex obtuse and unequally 2 - lobed. Inflorescences 1 - 4, from base of stem, sub-umbellate, often 4 - 6 - flowered; peduncle straight, 1.5 - 2.5 cm, stout, with 2 cupular sheaths. Flower with yellow sepals and petals and white labellum, all dense with purplish spots. Sepals similar, spatulate, 11.8 - 12.5 x 4.2 - 5.4 mm, base contracted, apex obtuse. Petals spatulate, 11.5 - 11.7 x 4.0 - 4.2 mm, apex obtuse. Lip with an epichile and a saccate hypochile; epichile subtriangular, 5.0 - 5.2 x 15.1 - 15.4 mm, fleshy, adaxially glabrous, with a central cushion with a yellow blotch, margin irregularly erose, apex acute; hypochile subglobose, ca. 8 mm tall, ca. 8.4 mm in diameter, white tinged with yellow at bottom, outside with 5 ridges. Column ca. 3 mm, stout; rostellum deeply 2 - lobed; pollinia 2, ca. 1.2 mm in diam.; stipe elongate, ca. 1.5 mm; anther cap nearly subglobose, apex narrowed into a beak.	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
BDDBE059794C56D1B8DC09F6F985599B.taxon	distribution	Distribution and habitat. Gastrochilus pechei was originally recorded from Myanmar without detailed information about locality. Here in the manuscript, we have confirmed the occurrence of this species in north Myanmar in the Naungmeng town, Putao county, Kachin state. It was growing epiphytically on the trunk of riparian trees in tropical rainforest which is dominated by Dipterocarpus obtusifolius Teijsm. ex Miq. (Dipterocarpaceae).	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
BDDBE059794C56D1B8DC09F6F985599B.taxon	materials_examined	Additional specimens examined. MYANMAR. Kachin State. Putao County, Naungmeng town, tropical forest, 700 - 800 m a. s. l., epiphyte on the trunk of riparian trees, 8 August 2017, Qiang Liu 470 (HITBC!).	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
BDDBE059794C56D1B8DC09F6F985599B.taxon	discussion	Discussion. The orchid flora of Myanmar is highly diverse but poorly known due to very few comprehensive studies. According to our current knowledge, about 800 orchid species are distributed in Myanmar (Kurzweil and Lwin 2014), but this is probably an underestimate. Many new distribution records and new species have been published in the last few years (Aung et al. 2017; Liu et al. 2017, 2018; Yang et al. 2017; Aung and Jin 2018, Zhou et al. 2018). Although the genus of Gastrochius is small, it is easy to be confused with other taxa of Aeridinae when it is without flowers and is also difficult to be identified within species even during the flowering period. So, many species may be misidentified as other taxa. Meanwhile, Myanmar lies in southeast Asia, with the northern part bordering with southwest China and India and the southern part connecting with Thailand, all of these regions being rich in species of Gastrochilus. Therefore, we believe that more and more species of Gastrochilu s will be found when undertaking further field investigations and systematic studies.	en	Liu, Qiang, Zhou, Shi-Shun, Li, Ren, Tan, Yun-Hong, Zyaw, Myint, Xing, Xiao-Ke, Gao, Jiang-Yun (2020): Notes on the genus Gastrochilus (Orchidaceae) in Myanmar. PhytoKeys 138: 113-123, DOI: http://dx.doi.org/10.3897/phytokeys.138.38781, URL: http://dx.doi.org/10.3897/phytokeys.138.38781
