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Taxonomic Notes on Grosourdya Muriculata (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a Little Known Endemic Orchid from the Andaman & Nicobar Islands, India

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Taxonomic Notes on Grosourdya Muriculata (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a Little Known Endemic Orchid from the Andaman & Nicobar Islands, India PLATINUM The Journal of Threatened Taxa (JoTT) is dedicated to building evidence for conservaton globally by publishing peer-reviewed artcles online OPEN ACCESS every month at a reasonably rapid rate at www.threatenedtaxa.org. All artcles published in JoTT are registered under Creatve Commons Atributon 4.0 Internatonal License unless otherwise mentoned. JoTT allows allows unrestricted use, reproducton, and distributon of artcles in any medium by providing adequate credit to the author(s) and the source of publicaton. Journal of Threatened Taxa Building evidence for conservaton globally www.threatenedtaxa.org ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) Short Communication Taxonomic notes on Grosourdya muriculata (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a little known endemic orchid from the Andaman & Nicobar Islands, India Sanjay Mishra, C.P. Vivek, Gautam Anuj Ekka & Lal Ji Singh 26 January 2019 | Vol. 11 | No. 1 | Pages: 13162–13167 DOI: 10.11609/jot.3842.11.1.13162–13167 For Focus, Scope, Aims, Policies, and Guidelines visit htps://threatenedtaxa.org/index.php/JoTT/about/editorialPolicies#custom-0 For Artcle Submission Guidelines, visit htps://threatenedtaxa.org/index.php/JoTT/about/submissions#onlineSubmissions For Policies against Scientfc Misconduct, visit htps://threatenedtaxa.org/index.php/JoTT/about/editorialPolicies#custom-2 For reprints, contact <[email protected]> The opinions expressed by the authors do not refect the views of the Journal of Threatened Taxa, Wildlife Informaton Liaison Development Society, Zoo Outreach Organizaton, or any of the partners. The journal, the publisher, the host, and the part- Publisher & Host ners are not responsible for the accuracy of the politcal boundaries shown in the maps by the authors. Partner Member Threatened Taxa Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2019 | 11(1): 13162–13167 Taxonomic notes on Grosourdya muriculata (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a little known endemic ISSN 0974-7907 (Online) orchid from the Andaman & Nicobar Islands, India Short Communication Short ISSN 0974-7893 (Print) Sanjay Mishra 1 , C.P. Vivek 2 , Gautam Anuj Ekka 3 & Lal Ji Singh 4 PLATINUM OPEN ACCESS 1,2,3,4 Botanical Survey of India, Andaman and Nicobar Regional Centre, Port Blair, Andaman & Nicobar Islands 744102, India. 1 [email protected] (corresponding author), 2 [email protected], 3 [email protected], 4 [email protected] Abstract: Grosourdya muriculata (Rchb.f.) R. Rice (Orchidaceae) is a to Grosourdya on the basis of supportng evidence from litle known epiphytc, endemic orchid from the Andaman & Nicobar his own work and the preliminary phylogenetc study of Islands in India. The present artcle provides the detailed taxonomy, ecology, distributon, conservaton status, and photographic account Pridgeon et al. (2014). The recently expanded genus now of the species. The data collected from feld surveys indicates that the includes species with pollinia having notched or clef status of the species needs to be downgraded to Near Threatened as per the criteria of IUCN (2018). aperture without auricles to the stpe. Therefore, small short-stemmed Pteroceras species with characters more Keywords: Epiphytes orchid, ecology, distributon, conservaton status, consistent with the genus Grosourdya, such as densely photographic account, status updaton, threatened taxa. muricate to speculate surface of the inforescence rachis and short-lived fowers generated singly in succession with gently curved column and a large conspicuous The epiphytc genus Grosourdya was established stgma are, placed under it. This brought up the total by H.G. Reichenbach in 1864 to commemorate R. de number of species in the genus to 28, distributed from Grosourdy, a renowned botanist who specialised in the China and the Indian subcontnent to southeastern Asia. medicinal plants of the Antlles and tropical southern Before the revision by Rice (2018), fve species of the America. It belongs to the subtribe Aeridinae, tribe Pteroceras, namely P. muriculatum (Rich.f.) P.F. Hunt, Vandeae, and subfamily Epidendroideae of the family P. monsooniae Sasidh. & Sujanapal, P. leopardinum (E.C. Orchidaceae. Preliminary molecular studies (Pridgeon Parish & Rchb.f.) Seidenf. & Smitn, P. teres (Blume) et al. 2014) led to the broadening of the circumscripton Holtum, and P. unguiculatum (Lindl.) H.A. Pedersen, of the genus and more than 20 species from the genera were reported from India. With the recent species Ascochilus Ridl., Ascochilopsis Carr, and Biermannia transfer, two species, namely P. monsooniae Sasidh. & King & Pantl. were placed under it. More recently, Rice Sujanapal and P. muriculatum (Rich.f.) P.F. Hunt, were (2018) transferred eight species of the genus Pteroceras transferred to the Grosourdya. Additonally, based DOI: htps://doi.org/10.11609/jot.3842.11.1.13162-13167 Editor: Pankaj Kumar, Kadoorie Farm and Botanic Garden, Tai Po, Hong Kong S.A.R., China. Date of publicaton: 26 January 2019 (online & print) Manuscript details: #3842 | Received 12 October 2017 | Final received 25 October 2018 | Finally accepted 24 November 2018 Citaton: Mishra, S., C.P. Vivek, G.A. Ekka & L.J. Singh (2019). Taxonomic notes on Grosourdya muriculata (Orchidaceae: Epidendroideae: Vandeae: Aeridinae), a litle known endemic orchid from the Andaman & Nicobar Islands, India. Journal of Threatened Taxa 11(1): 13162–13167; htps://doi.org/10.11609/jot.3842.11.1.13162-13167 Copyright: Mishra et al. 2019. Atributon 4.0 Internatonal License. JoTT allows unrestricted use, reproducton, and distributon of this artcle in any medium by adequate credit to the author(s) and the source of publicaton. Funding: Ministry of Environment, Forest and Climate Change (MoEF & CC) and Botanical Survey of India (BSI). Competng interests: The authors declare no competng interests. Acknowledgements: The authors are thankful to Dr. Paramjit Singh, director, Botanical Survey of India (BSI), Kolkata, for providing facilites and constant support. The authors are also thankful to the Ministry of Environment, Forest, and Climate Change for providing necessary facilites and support through the director, BSI, Kolkata. Thanks are also due to the Department of Environment and Forests, Andaman & Nicobar Islands, for extending logistc support during the feld visits. 13162 Taxonomic notes on Grosourdya muriculata Mishra et al. on molecular studies, Kocyan & Schuiteman (2013) Table 1. Status of Pteroceras species found in India afer transferred P. unguiculatum (Lindl.) H.A. Pedersen to modifcatons by (Rice 2018) the genus Brachypeza. Afer these recent taxonomic Earlier name Current name modifcatons, the Pteroceras in India include only two Pteroceras monsooniae Sasidh. & Grosourdya monsoonia (Sasidh. & Sujanapa. Sujanapa.) R. Rice species, namely P. leopardinum (E.C. Parish & Rchb.f.) P. leopardinum (E.C. Parish & Pteroceras leopardinum (E.C. Parish Seidenf. & Smitn and P. teres (Blume) Holtum (Table 1). Rchb.f.) Seidenf. & Smitn & Rchb.f.) Seidenf. & Smitn The updated taxonomy led to an increase in the P. muriculatum (Rich. f.) P.F. Hunt Grosourdya muriculata (Rchb.f.) number of species of Grosourdya in the Andaman & R. Rice P. teres (Blume) Holtum P. teres (Blume) Holtum Nicobar Islands to three, namely, G. appendiculata P. unguiculatum (Lindl.) H.A. Brachypeza unguiculatum (Lindl.) (Blume) Rchb. f., G. muriculata (Rchb.f.) R. Rice, and G. Pederson Kocyan & Schuit. muscosa (Rolfe) Garay. Pteroceras, earlier represented by three species (P. muriculatum (Rich.f.) P.F. Hunt, P. teres (Blume) Holtum, and P. unguiculatum (Lindl.) H.A. species of the island (Mathew et al. 2005). The present Pederson), now consists of only one species, namely P. authors studied the species for its detailed taxonomy, teres (Blume) Holtum. ecology, and distributon and evaluated its conservaton Grosourdya muriculata (Rchb.f.) R. Rice is an endemic status as per the recent IUCN criteria (IUCN 2018). The species of the Andaman & Nicobar Islands and was results are summarized below along with images for recorded as Endangered by Karthigeyan et al. (2014). ease of identfcaton. Moreover, it was described as one of the vanishing orchid Figure 1. Map showing the distributon of Grosourdya muriculata in the Andaman & Nicobar Islands (Mapped by Dr. Shivashankar, Department of Disaster Management, Pondicherry University, Port Blair) Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2019 | 11(1): 13162–13167 13163 Taxonomic notes on Grosourdya muriculata Mishra et al. Taxonomy triangular and concave. Flowers spirally arranged, Grosourdya muriculata (Rchb.f.) R.Rice pedicellate, light yellow, c. 1.5cm across, sweet-scented. Photo Intro to: Vandoid Orchid Genera in Asia. 160. Sepals and petals with two to four purple bars. Sepals 2018; Sarcochilus muriculatus Rchb.f., Gard. Chron., n.s., sub-equal; median sepal obovate to elliptc, c. 7.5x4.0 15: 198. 1881. mm, obtuse at apex, base 1.2–2.4 mm wide; lateral Synonyms: Thrixspermum muriculatum (Rchb.f.) sepals spreading, c. 7x4 mm, pointed at apex, base Rchb.f., Gard. Chron., n.s., 16: 198. 1881; Pteroceras 1.4–3.1 mm wide. Labellum 3.5–5.1 mm long, sessile, muriculatum (Hort. ex Rchb. f.) P.F.Hunt in Kew Bull. 24: erect side lobes pointng upwards, white with a brick red 96. 1970. blotch, 3.5–5.0 x 1.1–2.0 mm, triangular; apex mostly Type: Bull s. n. (anno1881)/Herb, Rchb.f. 31588, obtuse, fnely serrate, front edges connected by high “India orientalis”-Andaman Islands (Holotype
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