Up to 45 cm. high. Leaves few in an elongate cylindrical rosette, to 35 cm. long, narrowly scarious-margined, not cretaceous; sheaths very indistinct, about as long as the blades but scarcely wider; blades ligulate, rounded-apiculate, to 4 cm. wide. Scape erect or somewhat curved, slender. Scape-bracts remote, erect, involute, lance-ovate, obtuse and apiculate. Inflorescence laxly compound with simple or rarely divided branches, equaling or exceeding the leaves, 5-20 cm. long, glabrous. Primary bracts lanceolate, acute, much shorter than the usually naked sterile base of the spike. Spikes divergent, 3-12 cm. long, lax. Floral bracts broadly ovate, acute, shorter than the sepals. Flowers perfect. Sepals strongly asymmetric with the left side broadly elliptic and the right side cuneate at base and at the apex expanded into a large wing overtopping the midnerve, 5-6 mm. long, nerved, subcoriaceous. Petals elliptic, obtuse, barely exserted. Style lacking.
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