Plant flowering 5-6 dm high. Leaf-blades ligulate, broadly acute with a slender, involute, 1 cm long apiculus, 8 cm wide, flat, minutely pale-lepidote on both sides, subdensely serrate with spines 1.5 mm long. Scape erect, stout, densely flocculose; scapebracts erect, densely imbricate, amply elliptic, acuminate, pungent, obscurely punctulate-lepidote. Inflorescence bipinnate, densely cylindric, 2 dm long, or tripinnate with several digitate long axes; axis stout, alate-angled, brownish-flocculose; primary bracts like the scape-bracts but much smaller, the lowest much exceeding the spikes; spikes stout ellipsoid, very densely strobilate, 3 cm long at anthesis, many-flowered. Floral bracts long-acuminate from a suborbicular base, 18 mm long, 12 mm wide, rather thin, obscurely nerved, brown, soon glabrous, slightly carinate toward apex; flowers sessile. Sepals ovate, strongly mucronate, 4-8 mm long; petal-blades elliptic, purple; ovary obconic, small; placentae apical; ovules long-caudate; fruit much enlarged from the ovary.