Robust herb to 1 m tall; tuber turbinate to hemispheric with flat base, vertical or horizontal with yellow or orange flesh, sometimes getting bluish exposed to air, 2.5-10.2 cm long and 1.5-7 cm wide, sometimes dividing in upper part; sap abundant; tunic fibrous, black. Outer leaves shorter than the inner, the most outer up to 20 cm long, spathe like at base, oblong in the upper part, acuminate at apex, about 2 cm wide; densely covered with tufted and 2-branched trichomes; inner leaves 5-9, dark green, lighter at base, creating a distinctive pseudostem 6-15 cm long, linear, rigidly coriaceous, erect, conduplicate, 30-130 x 0.5-2.2 cm, pilose with tufted whitish to silvery greyish hairs along margins and midrib and with 2-3-branched hairs on the lamina; veins 11-17, distinctive. Inflorescences 1-5, with scapes 30-70 cm long and 1.5-2.0 mm wide, slender, covered with long ascending greyish-white hairs, overtopped by the mature leaves. Flowers 3-14 (-23), alternate, in an up to 15 cm long spicate raceme; lower pedicels 0.6- 1.0 (-1.9) cm long, shorter towards the apex; bracts linear subulate, 12-26 mm long; tepals light yellow inside and green outside, outer tepals sometimes with red stripe, (5-) 12-18 long and 5-7 mm wide; outer tepals lanceolate, acute; inner tepals suboval and subacute; stamens equal, yellow or brown; filaments subulate, 1.3-2.5 mm long; anthers sagittate, fused apically, 3-6 mm long; ovary turbinate, green, 4-8 mm long and 3-5 mm wide; style 0.5-1 (-2.3) mm; stigma yellow, piramidal, 1-2 (-3.5) mm long. Capsule turbinate, 8 mm long, circumscissile, densely villose. Seeds glossy, black, globose, 1.2-1.7 mm in diameter with papillate testa, cuticle smooth.