A key to the genus Epipogium R. Br.

1a. Saprophytic leafless terrestrial herb up to 45 cm. high; tuber ovoid, up to 4 cm. long and 2•5 cm. diam.; scape erect, rather fleshy, with numerous blunt loosely sheathing scales on the lower part; raceme up to 25-flowered, 3-15 cm. long; flowers usually pendulous, whitish or cream with small purplish or pink spots; sepals and petals narrow, acute, nearly 1 cm. long; lip entire, narrowly ovate, with the cordate base enveloping the column, acute, about 1 cm. long, with 2 lines of short hairs running from base to apex, the latter somewhat thickened; spur up to 5 mm. long; column with swollen stigmatic lobes at the base, and much thickened at the apex Epipogium roseum

World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 17/02/2015

Epipogium roseum (D.Don) Lindl., J. Proc. Linn. Soc., Bot. 1: 177 (1857).
Homotypic Synonyms:
Limodorum roseum D.Don, Prodr. Fl. Nepal.: 30 (1825).
Ceratopsis rosea (D.Don) Lindl., Gen. Sp. Orchid. Pl.: 384 (1840).
Galera rosea (D.Don) Blume, Mus. Bot. 2: 188 (1856).
Heterotypic Synonyms:
Galera nutans Blume, Bijdr. Fl. Ned. Ind.: 415 (1825).
Podanthera pallida Wight, Icon. Pl. Ind. Orient. 5: 22 (1851).
Epipogium nutans (Blume) Rchb.f., Bonplandia (Hannover) 5: 36 (1857).
Epipogium guilfoylii F.Muell., Fragm. 8: 30 (1873).
Epipogium tuberosum Duthie, Ann. Roy. Bot. Gard. (Calcutta) 9(2): 151 (1906).
Epipogium africanus Schltr., Bot. Jahrb. Syst. 45: 399 (1911).
Epipogium nutans var. celebicus Schltr., Repert. Spec. Nov. Regni Veg. 10: 5 (1911).
Epipogium rolfei (Hayata) Schltr., Repert. Spec. Nov. Regni Veg. 10: 5 (1911).
Galera rolfei Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30(1): 348 (1911).
Epipogium kassnerianum Kraenzl., Bot. Jahrb. Syst. 51: 370 (1914).
Galera kusukusensis Hayata, Icon. Pl. Formosan. 4: 121 (1914).
Epipogium kusukusense (Hayata) Schltr., Repert. Spec. Nov. Regni Veg. Beih. 4: 153 (1919).
Epipogium makinoanum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 4: 153 (1919).
Gastrodia schinziana Kraenzl., Vierteljahrsschr. Naturf. Ges. Zürich 74: 66 (1929).
Epipogium sinicum C.L.Tso, Sunyatsenia 1: 132 (1933).
Epipogium pooneranthum Fukuy., Trans. Nat. Hist. Soc. Formosa 32: 243 (1942).
Stereosandra schinziana (Kraenzl.) Garay, Arch. Jard. Bot. Rio de Janeiro 13: 32 (1954).
Epipogium dentilabellum Ohtani & S.Suzuki, Sci. Rep. Yokosuka City Mus. 6: 28 (1961).
Epipogium sessanum S.N.Hegde & A.N.Rao, J. Econ. Taxon. Bot. 3: 598 (1982).
Epipogium indicum H.J.Chowdhery, G.D.Pal & G.S.Giri, Nordic J. Bot. 13: 419 (1993).
Description:
Plant leafless, saprophytic. Rhizome 2.5-5 cm long, 0.15-0.35 cm in diameter, subterranean, ovoid, tuber-like, multi-nodial, horizontal. Stem 18-60 cm tall, erect, fleshy, hollow, glabrous, brownish at the base, whitish or pinkish-white with red streaks towards the apex. Cauline bracts up to 8, ca. I cm long, ovate-lanceolate, acute, herbaceous, amplexicaul, shorter than internodes. Inflorescence 12-20 cm long, 15-25- or more-flowered, lax. Flowers medium-sized, tubular, not opening widely, nonresupinate, white. Flower bracts ca. 15 mm long, ovate-lanceolate, acute, thin, membraneous. Pedicel ca. 7 mm long, non-twisted or slightly twisted. Ovary 4-6 mm long, swollen. Dorsal sepal 9-12 mm long, 2 mm wide, narrow lanceolate, acute, thin, single-nerved. Petals 8-10 mm long, 1.5-2 mm wide, oblong-lanceolate, acute, thin, single-nerved. Lateral sepals of the same size, obliquely narrow lanceolate, acute, thin, 'singlenerved. Lip 9-10 mm long, 4.5-5 mm wide, sessile, ovate, acute, cochleate, with two or three verrucose crests along its length or in its apical part. Gynostemium 4-4.5 mm long, typical for the genus. Fruit pedicellate, capsule ca. twice as long as the ovary.
Habitat:
Dense humid forests, semi-deciduous forests with Sterculiaceae and Ubraceae. January-March, August-September.
Cultivation:
As given for the genus, hot to cool growing erect, leafless, mycoheterotrophic terrestrial.
Distribution:
Guinea, Ghana, Nigeria, Cameroon, Central African Republic, Equatorial Guinea (Annobon, Bioko), the Republic of Congo, the Democratic Republic of Congo (Zaire), Uganda, Kenya, Angola, Malawi, Indo-Malaysia to Australia, Pacific Islands. Alt. 550-1700 m.
References:
Orchidaceae of West-central Africa, vol. 1, Gdansk University Press Gdansk 2010; Flora Zambesiaca Vol 11 Part 1 Pope 1995; Flora of Tropical East Africa Orchidaceae Part 2 Cribb 1984
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