Zingiber montanum

Rhizome thick, 1-2 cm, perennial, fleshy, horizontal, aromatic, yellow inside. Leafy shoots 1-1.5 m high. Leaves subsessile; ligule very short, 2 mm long, bilobed, pubescent; lamina 20-40 x 3-4 cm, linear-lanceolate, tip acute, base slightly rounded, upper glabrous, lower surface pubescent. Inflorescence borne separately from the leafy shoot; peduncle 10-25 cm long, clothed with pubescent sheaths; spike c. 6-8 x 4 cm, ovate, deep red. Bracts 3-3.5 x 3-3.6 cm, broadly ovate, subacute with a narrow membranous margin, purplish-brown, pubescent. Bracteole 2-2.5 x 1.2-1.5 cm, obtuse, 3-toothed. Calyx c. 1.5 cm long, truncate, white, membranous, unilaterally split, glabrous. Corolla tube 2.3-2.5 cm long, pale yellow; lobes lanceolate, pale yellow; dorsal lobe 3.2 x 1.5 cm, cymbiform; lateral lobes 2.5 x 1 cm, linear-lanceolate, reflexed. Labellum 3-lobed, c. 2.5 cm wide, yellowish-white, suborbicular, apex emarginate with crisped margins. Lateral lobes c. 8 x 5 mm, obliquely obovate, erect. Filament short; anther-thecae c. 1 cm; crest longer than the thecae. Style long, filiform, stigma obconic, margin ciliate. Epigynous glands linear, free from each other. Ovary 3-4 mm long, pubescent. Capsule c. 1.5 cm in diameter, ovoid. Seeds very small, purple.

References:

The Plant List Ver.1.1  WCSP  GRIN  MPBd  India Biodiversity Portal  Wikipedia