Curcuma ecomata
Leafy shoot 30-50 cm tall; leaves obovate-lanceolate, with or without red patch along midrib, 15-45 x 5-12 cm. Inflorescence terminal or lateral, 8-25 cm long; coma bract absent. Flowers pale to dark purple; corolla lobes white or pale pink, 16 x 7 mm. Staminodes obliquely ovate, pale to dark purple, 15-16 x 9 mm. Labellum obovate, pale to dark purple with yellow band in the middle, apex bifid, 19 x 14 mm. Stamen white; anther spurs cylindrical, forward-pointed, apex acute, 4-5 mm long. Ovary hairy; stylodes narrowly cylindrical, apex acute, 7 mm long.
Main rhizome ovoid, pale brown inside, 3-5 x 3-4 cm; rhizome very short. Leafy shoot 30-50 cm tall; bladeless-sheath pubescent, 5-30 cm long. Leaf sheath pubescent, 8-30 cm long; ligule 2 mm long; petiole 4-8 cm long; blade obovate-lanceolate, glabrous or pubescent on both surfaces, base cuneate, apex acuminate with or without red patch along midrib, 15-45 x 5-12 cm. Inflorescence terminal or lateral, 8-25 cm long; scape glabrous, 3-15 cm long. Bracts glabrous, apex acute, 3.5 x 1.5 cm; coma bracts absent. Calyx tubular, 17 mm long, glabrous, apex unequally 3-lobed. Corolla tube hairy on upper half, 25 mm long; lobes white or pale pink, glabrous, 16 x 7 mm; dorsal one hooded, apex cucullate; lateral ones shallowly concave, apex rounded. Staminodes obliquely ovate, pale pink to dark purple, apex obtuse, 15-16 x 9 mm. Labellum obovate, pale pink to dark purple with yellow band in the middle, hairy along midband, apex bifid, 19 x 14 mm. Stamen white; filament flat, glandular hairy, 3 mm long; anther 10 mm long; spurs cylindrical, forward-pointed, apex acute, 4-5 mm long. Ovary barrel-shaped, hairy, 4 x 3 mm; stylodes narrowly cylindrical, apex acute, 7 mm long; stigma laterally opened, apex bi-lobed, ciliate, 1 mm wide.
Endemic to northern Thailand.
Ecoma, flower pale to dark purple