Orchids in Two Protected Forests in Kohima District of Nagaland, India
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Pleione 11(2): 349 - 366. 2017. ISSN: 0973-9467 © East Himalayan Society for Spermatophyte Taxonomy doi:10.26679/Pleione.11.2.2017.349-366 A checklist of orchids in two protected forests in Kohima district of Nagaland, India Wenyitso Kapfo1 and Neizo Puro Department of Botany, Nagaland University, Lumami-798627, Nagaland, India. 1 Corresponding Author, e-mail: [email protected] [Received 17.10.2017; Revised 21.11.2017; Accepted 19.12.2017; Published 31.12.2017] Abstract Two protected forests in Kohima District viz. Pulie Badze Wildlife Sanctuary and Jotsoma Community Forest are hosts to a rich diversity of orchids. This paper reports 66 species from 32 genera of Orchidaceae from these two Protected Areas. Key words: Kohima district, Pulie Badze Wildlife Sanctuary, Jotsoma Community Forest, Orchid diversity INTRODUCTION The word orchid evokes superlative terms associated with beauty, diversity and range of distribution. Being estimated at well over 25,000 species, belonging to ca 800 genera, (Chen et al 2009), Orchidaceae remains the largest family among families of flowering plants. India is host to 1378 species of orchids (Verma & Lavania 2014), of which, 860 species occur in its NE region (Chowdhery 2009). In the state of Nagaland, 396 species, belonging to 86 genera, have been described (Deb & Imchen 2008) even as more and more are being added to the local orchid flora by various authors (Chaturvedi et al. 2012; Jakha et al. 2014; Jakha et al. 2015; Deb et al. 2015; Deb et al. 2016; Rongsengsashi et al. 2016). This paper lists 66 species belonging to 32 genera of Orchidaceae occurring in the study area. MATERIALS AND METHOD The study area is located between 25° 35. 800' to 25° 40.100' N latitudes and 94°01.700' to 90°05. 800' E longitudes, spanning an altitude range from 1500m amsl to about 3000m amsl. The vegetation of the study site is Northern Sub-Tropical Broad-leaved Hill Forest (Champion & Seth 1968). Lying SW on the fringes of Kohima town and contiguous with the second highest peak, Japfu, in Nagaland, the study area comprises two adjacent and contiguous sites namely Pulie Badze Wildlife Sanctuary (25° 37. 240' to 25° 39.800' N and 94°04.150' to 90°05. 800' E) and Jotsoma Community Forest (25° 35. 800' to 25° 40.100' N and 94°01.700' to 90°04. 250' E). The two protected areas collectively cover a total area of about 50 sq km. The climate of the study area is of monsoon type with high humidity level, experiencing an annual rainfall average of 1900 mm, concentrated during May to October, and temperature ranges from 8° C to about 25° C. The drainage pattern is mainly dendritic, brown forest soil (inceptisol) is the major type of soil found in the entire district of Kohima. The study site is fairly well preserved due to the joint effort of villagers and the state government. It shows very dense to moderately dense forest cover (FSI 2011), comprising climax community of trees and luxuriant epiphytic growth, including a rich diversity of orchids. 350 Orchids in two protected forests of Kohima district This paper is the product of regular field trips conducted over 5 years, from 2012 to 2016. Review of orchid flora of Nagaland, by various authors (Changkija et al. 1992; Deorani & Naithani1995; Hynniewta et al. 2000; Deb et al. 2003; Deb & Imchen 2008), provided valuable guidance. The fresh specimens were collected in the field, processed and made into mounted herbarium sheets following the standard method as outlined by Jain & Rao (1977). These were then examined and identified with the help of literature and comparison with herbarium specimens at ASSAM and the herbarium in department of Botany, Nagaland University (NU). The herbarium specimens were then deposited at NU. Protologue reference and the name of the author have been cited against each taxon. Notes on distribution at global level is given after Chen et al (2009), while for the country and state level distribution, Deb & Imchen (2008) is primarily followed. Additional data including time of flowering, habitat, specimen number and date of collection are furnished against each species. ENUMERATION The checklist is enumerated in alphabetical order, firstly using the initial of the generic name, and then the initial of the specific epithets. AERIDES Lour. About 20 species in Sri Lanka, India, Nepal, Bhutan, Myanmar, China, Thailand, Indochina, and Malaysia to the Philippines and Indonesia; 10 species in India; 5 species in Nagaland Aerides odorata Lour., Fl. Cochinch. 2: 525. 1790. Aerides odorata var. demidovii Linden, Lindenia 1: t. 14. 1885. Aerides odorata var. ballantiniana (Rchb.f.) A.H.Kent, Man. Orchid. Pl. 7: 78. 1891. Stem stout; leaf blade thickly leathery and unequally bilobed; sepals and petals white, tinged with purple, spur apex greenish. Flowering: June – July; Habitat: Epiphytic on tree bark in subtropical mixed forest; Exsiccatae: NUK-040, dated 24.08.2014. AGROSTOPHYLLUM Blume 40 to 50 species in Old World tropics, Seychelles and tropical Asia east to the Pacific islands with New Guinea as center of distribution; 4 species in India and 3 in Nagaland. Agrostophyllum callosum Rchb.f. in Seemann, Fl. Vit. 296. 1868. Rhizome creeping, 3 – 4 mm in diam.; leaves several, distichous, attenuate, unequally bilobed, inflorescence subcapitate. Flowering: July – August; Habitat: Epiphytic on tree bark in subtropical mixed forest; Exsiccatae: NUK-050, dated 30.09.2016. ANTHOGONIUM Wall. ex Lindl. 1 species: Bangladesh, Bhutan, Cambodia, China, N India, Laos, Myanmar, Nepal, Sri Lanka, Thailand, Vietnam. 1 species in India and 1 in Nagaland. Anthogonium gracile Wall. ex Lindl., Intr. Nat. Syst. Bot. 2: 341. 1836. Anthogonium griffithii Rchb.f., Bonplandia (Hannover) 2: 90. 1854. Anthogonium corydaloides Schltr., Repert. Spec. Nov. Regni Veg. Beih. 4: 66. 1919. Wenyitso Kapfo &Neizo Puro 351 Plants up to 40 cm tall; pseudobulbs 1 – 2 cm in diam.; leaves 2 – 5, papery; inflorescence erect, 4 – 6 laxly flowered; sepals and petals and lip pink. Flowering: July – November; Habitat: Terrestrial in open spaces and road side; Exsiccatae: NUK-085, dated 02.09.2012. ARACHNIS Blume About 13 species in NE India, Asia to Indonesia, New Guinea, and the Pacific islands. 2 species in India, 1 in Nagaland. Arachnis labrosa (Lindl. & Paxton) Rchb.f. in Bot. Centralbl. 28: 343. 1886. Arachnis labrosa var. labrosa, zhai chun zhi zhu lan (yuan bian zhong), Fl. China. 25: 466. 2009. Stem rigid with many nodes; leaves distichous, up to 2.5 cm broad, obtusely unequally bilobed; inflorescence up to 1 m long; flowers lax; sepals and petals greenish yellow, with prominent red-brown markings on both; petals 4 – 5 mm wide. Flowering: August – September; Habitat: Epiphytic on tree bark in subtropical mixed forest; Exsiccatae: NUK- 061, dated 29.08.2014. BULBOPHYLLUM Thouars About 1,900 species, chiefly in tropical areas of both Old and New Worlds. About 100 species in India and 35 in Nagaland. Bulbophyllum reptans (Lindl.) Lindl. ex Wall., Numer. List 1988. 1829. Phyllorkis reptans (Lindl.) Kuntze, Revis. Gen. Pl. 2: 677 1891. Rhizome creeping, branched, sheathed; pseudobulbs ovoid, 1 – 2 cm in diam. with a terminal, narrowly oblong leaf; inflorescence much shorter than leaves, few flowered; sepals and petals pale yellow, lip with brownish purple stripes. Flowering: January – October; Habitat: Epiphytic on tree bark in mixed subtropical and temperate forest; Exsiccatae: NUK-082, dated 10.03.2014. Bulbophyllum retusiusculum Rchb.f., Gard. Chron. 1869: 1182. 1869. Bulbophyllum flavisepalum Hayata, Icon. Pl. Formosan. 2: 131. 1912. Creeping rhizome giving off ovoid pseudobulb about 3cm apart, each with a terminal leaf. Inflorescence 15cm long bearing up to 9 flowers, petals red-veined. Flowering: September – December; Habitat: Both epiphytic on tree bark in Rhododendron forest and terrestrial on mossy forest floor; Exsiccatae: NUK-096, dated 22.09.2012. Bulbophyllum rothschildianum (O’Brien) J.J.Sm. in Bull. Jard. Bot. Buitenzorg II, 8: 27. 1912. Cirrhopetalum rothschildianum O’Brien in Gard. Chron. III, 18: 609. 1895. Mastigion rothschildianum (O’Brien) Lucksom, Orchids Sikkim N.E. Himalaya: 682. 2007. Rhizome stout with sheaths, pseudobulb ovoid with a terminal leaf; flowers in umbels, 2-4 flowered; petals purplish red, lateral sepals up to 15 cm long, caudate and papillate. Flowering: September – October; Habitat: Epiphytic on tree bark in mixed subtropical and secondary forest; Exsiccatae: NUK-076, dated 04.09.2014. Bulbophyllum umbellatum Lindl., Gen. Sp. Orchid. Pl. 56. 1830. Cirrhopetalum maculosum Lindl. in Edwards’s Bot. Reg. 27(Misc.): 81. 1841. Bolbophyllopsis maculosa Rchb.f. in Ann. Bot. Syst. 6: 243. 1861. Bulbophyllum saruwatarii Hayata in Icon. Pl. Formosan. 6: 72. 1916. Bulbophyllum annamicum (Finet) T.B.Nguyen & D.H.Duong, Fl. Taynguyen. Enum. 196. 1984. 352 Orchids in two protected forests of Kohima district Creeping rhizome, giving off pseudobulb of 1-2 cm in diam., 1-2cm apart from each other; scapes arising from base of pseudobulb, umbels 2 – 4 flowered; petals greenish yellow. Flowering: April – July; Habitat: Epiphytic on tree bark in mixed subtropical and secondary forest; Exsiccatae: NUK-031, dated 23.07.2014. Bulbophyllum wallichii Rchb.f. in Ann. Bot. Syst. 6: 259. 1861. Phyllorchis wallichii (Lindl.) Kuntze, Revis. Gen. Pl. 2: 676. 1891. Bulbophyllum refractoides Seidenf. in Bot. Tidsskr. 65: 342. 1970. Tripudianthes wallichii (Rchb.f.) Szlach. & Kras, Richardiana in 7: 96. 2007. Pseudobulbs nearly contiguous, leaves deciduous at anthesis, inflorescence with many nodding flowers; perianth yellow with purple spots. Flowering: May – June; Habitat: Epiphytic on tree bark in Rhododendron forest; Exsiccatae: NUK-026, dated 23.06.2012. CALANTHE R.Br. About 150 species: tropical and subtropical Asia, Australia, New Guinea, SW Pacific islands, tropical Africa and Central and NW South America. 23 species in India and 22 in Nagaland. Calanthe brevicornu Lindl., Gen. Sp. Orchid. Pl. 251.