Description
Key Characters:
Growth Form:
Erect, deciduous, acaulescent herbs with leaf tufts 0.5–1.5 m tall.
Stems:
Rhizomatous, primary rhizomes usually solitary, erect, ovoid, up to 4 cm wide, internally dark yellow to orange with a paler outer area, producing thick, internally orange or dark yellow roots, secondary rhizomes abundant, usually produced in 1 plane, cylindrical, distichous, 5–10 cm long, 2–3 cm wide, with shorter lateral rhizomes.
Roots:
Fibrous root system.
Leaves:
Leaves simple.
Alternate, basal.
Blades lanceolate, oblong, or elliptic, 5–8, 30–50 cm long, 8–18 cm wide.
Apex short acuminate.
Base attenuate.
Surfaces glabrous.
Margins entire.
Lateral veins parallel, diverging from prominent midrib.
Petiolate.
Stipules absent.
Flowers:
Flowers in inflorescences erect, synchronous with the leaves and emerging from the center of the leaf tuft, cylindrical, 10–20 cm long, 5–8 cm wide, fertile bracts green, ovate, 5–6 cm long, connate less than 1⁄2 their length, sterile bracts white and green to pink, bracteoles white with pink or green apex, 3–3.5 cm long.
Flowers slightly fragrant, bisexual (perfect), zygomorphic, pedicellate, floral tube funnelform, the lobes ovate to oblong.
Calyx 3-lobed, the lobes unequal; 9–13 mm long.
Corolla adnate with the stamens into a floral tube, distally 3-lobed, corolla pink to yellowish or greenish, the tube 17–24 mm long, the lobes 10–15 mm long.
Stamens 5, in 2 whorls, only the posterior one of the inner whorl fertile, the other 2 members of inner whorl connate to form a highly variable, often conspicuous labellum; labellum whitish with a yellow median band, broadly obovate, 15–19 mm long and wide; lateral staminodes narrowly obovate or elliptic, t0–16 mm long; stamen ca. 6 mm long.
Ovary inferior, with 2 variously developed apical nectary glands, 3-celled, sometimes incompletely so, rarely 1-celled, placentation axile, parietal (or essentially basal), or rarely free-central; ovules usually numerous; style filiform, often enveloped in a groove of the fertile stamen and embraced by the thecae; stigma various, often papillose and protruding beyond anther.
Fruit:
Capsules globose or ellipsoid; irregularly dehiscent.
Seeds ovoid; brown.
Ploidy:
2n = 32; 62–64
Habitat:
Elevation Range: