Plant description |
Terrestrial, sympodial, caespitose herb, ca. 98 cm tall (excluding inflorescence). Roots 3 mm in diameter, basal, thick. Stems 96 x 0.49-0.53 cm, simple, cane-like, laterally compressed, ancipitose, erect to arching, straight. Leaves 12, articulate, alternate, sub-coriaceous and similar in length; sheaths 3.30-3.34 x 0.49-0.53 cm tubular, laterally compressed, minutely striated; blades 11.5-14.3 x 1.3-1.65 cm, linear-lanceolate, acuminate, sub-erect, margin entire, spreading. Spathes 1-2, 6.0-7.8 x 0.68 cm, tubular, conduplicate, acute, papyraceous. Inflorescence ca. 17 cm long, apical, racemose, arched, sub-densely many-flowered; peduncle 8 cm long, laterally compressed, straight, nearly totally hidden by spathe; apically provided with a bract 0.24-3.04 mm long, linear-oblong, acuminate, embracing. Floral bracts 4-16 mm long, prominent, about as long as ovary or longer, linear-triangular, acuminate, embracing. Ovary 7-10 mm long, terete, thin, not inflated, unornamented. Flowers ca. 36, opening in succession from base to apex, eventually all open, resupinate, lip always facing rachis, medium green, concolor; fragrance not registered. Sepals free, fleshy, acuminate, 3-veined, margin minutely crenulate and transparent, spreading; dorsal sepal 7.0 x 2.0-2.25 mm, somewhat spreading, oblong-elliptic; lateral sepals 9.0 x 2.65 mm partly spreading, ovate-triangular, oblique, acuminate, aristate, with prominent dorsal keel that continues apically to form an aristate tip, dorsal margin of keel erose. Petals 5.82 x 0.64 mm, spreading, free, linear-oblong, acute, somewhat falcate, 1-veined, margin entire, spreading. Lip 4.53 x 2.42 mm (without spreading the lateral lobes), united to column, fleshy, 3-lobed, base cordate; bicallose, calli prominent, laminar, short; disc with a very short thick mid-rib, extending beyond calli to base of mid-lobe; lateral lobes 0.97 x 2 mm, embracing apex of column, semi-orbicular-dolabriform, apex acute to apiculate, distal margin erose; mid-lobe 2 x 1.04 mm, slightly arched in natural position, narrowly triangular, acute, margin entire. Column 3.29 mm long, somewhat humped at base, thick, apex with pair of truncate wings, notched above. Clinandrium-hood short, truncate, covering nearly whole anther, margin entire. Anther globose, with a low central rib; 4-celled. Pollinia 4, sub-obovoid, laterally compressed; caudicles soft and granulose, somewhat longer than pollinia; viscarium semi-liquid. Rostellum sub-apical, slit. Lateral lobes of stigma not seen. Nectary short, penetrating about 1/3 of ovary, no inflated, unornamented. Capsule not seen. |