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Nervilia Comm. ex Gaudich.

2. Nervilia section Nervilia

  • Inflorescence four to many flowered 

  • Leaf glabous rachis elongated 

  • Lip lacking spur

  • This section is represented by one species at Sindhudurg

Nervilia concolor (Blume) Schltr. 

  • Cordyla concolor Blume in Bijdr. Fl. Ned. Ind.: 416 (1825)

  • Pogonia concolor (Blume) Blume in Mus. Bot. 1: 32 (1849)

  • Roptrostemon concolor (Blume) Lindl. in Gen. Sp. Orchid. Pl.: 453 (1840)

  • Aplostellis flabelliformis (Lindl.) Ridl. in Fl. Malay Penins. 4: 203 (1924)

  • Epipactis carinata Roxb. in Fl. Ind., ed. 1832. 3: 454 (1832)

  • Nervilia aragoana Gaudich. in Voy. Uranie: 422 (1829)

  • Nervilia carinata (Roxb.) Schltr. in Bot. Jahrb. Syst. 45: 404 (1911)

  • Nervilia flabelliformis (Lindl.) Tang & F.T.Wang in Acta Phytotax. Sin. 1: 68 (1951)

  • Nervilia scottii (Rchb.f.) Schltr. in Bot. Jahrb. Syst. 45: 404 (1911)

  • Nervilia tibetensis Rolfe in Notes Roy. Bot. Gard. Edinburgh 8: 128 (1913)

  • Nervilia yaeyamensis Hayata in Icon. Pl. Formosan. 2: 140 (1912)

  • Pogonia carinata (Roxb.) Lindl. in Gen. Sp. Orchid. Pl.: 414 (1840)

  • Pogonia flabelliformis Lindl. in Gen. Sp. Orchid. Pl.: 415 (1840)

  • Pogonia gracilis Blume in Coll. Orchid.: 155 (1858)

  • Pogonia nervilia Blume in Mus. Bot. 1: 32 (1849), nom. superfl.

  • Pogonia scottii Rchb.f. in Flora 55: 276 (1872)
     

Ecology This orchid grows under deep shades of trees in humus rich soil among leaf litter in evergreen and semievergreen forest 
Tuber 1.5-2 cm in diam., subglobose, white, with parallel lines along the circumference dividing into obscure lobes.

Leaf appearing after the flowers, erect, petiolate. Petiole 8-20 cm long, purple turning light green with purple lines ; generally 2 stolons arise on opposite sides from the petiole just above the tuber. Lamina 9-12x8-11 cm, cordate, broadly ovate to almost orbicular, acute, acuminate or apiculate, glabrous, dark green above, pale green below; nerves up to 18 in number. 

Scape 10-25 cm tall, 2-sheathed, green above, light purple below; lower sheath 2 cm long, white with brown streaks, loose, acute ; upper sheath about 2 cm long, closely fitting round the peduncle, similar to the lower one. Raceme few-to many-flowered, lax. 
Flowers drooping, green, shortly stalked, about 20-25 mm long. Bracts 14X 2 mm, decurved, linear lanceolate, subacuminate, glabrous, light green, faintly tinged with purple Pedicels 3 mm long, green, curved. 

Sepals 17-25X 2-4 mm, green or yellowish-green, oblanceolate, acute or subacute, entire, glabrous, often the midnerve subcarinate below, the lateral pair of nerves fainter. 
Petals 14-25X 2-5 mm, green, similar to sepals, often narrower at the base.

Labellum 17-24 mm long, subsaccate and subclawed at the base, obovate .in outline, 3-iobed, lateral lobes erect, 1-3 mm broad, parallel and embracing the column; narrowly oblong, acute or obtuse, pale green; midlobe 4-6X 5-7 mm, variable in shape, not constricted or deflexed, obtuse or subacute, irregularly crenulate, somewhat crimped with incurved edges, pale yellowish-green, nerves red-pink, parallel, subwavy along the midlobe. The 3 central prominent nerves along' the entire length of the lip-.are yellowish-green, minutely hairy, the pubescence extending to some of the lateral nerves also. 

Column pale green, 7-10 mm long, dilated above, placed at an angle to the ovary.

Anther posticous, white above, reddish towards the base; midnerve red-purple; pollinia two sectile Stigmatic surface fairly broad, circular trapezoid. Ovary 4-5 mm long, drooping, green often flushed with pink, the ridges often winged. 

Capsule globose 10x8mm strongly ribbed 
Flowering:  June – July       
Leaf: July        
Fruiting:  July

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