Plants up to 70 cm high. Roots many, all alike, hard, thick, often covered with a tomentum of thick, long, felted root hairs. Rhizome compact, hard. Squamae brown, narrow tubular, several surrounding one leaf or scape (but none surrounding a shoot). Leaves numerous, terete or subterete, 30-70 cm long, 3-5 mm in diam., usually erect and straight, glabrous or slightly muricate, ribbed. Inflorescence a simple raceme with ca. 30 flowers, compact at first and shorter than the leaves, ultimately longer and then usually prostrate and falsely secund; scape arcuate at the base with a few sterile bracts (vestiges of suppressed side-branches); fertile bracts subulate, up to 7 mm long; pedicels patent, lengthening during anthesis, curved downwards near the base then spreading, up to 28 mm in fruit; scape and pedicels thickening markedly in fruiting stage. Flowers with perianth rotate, immaculate; segments 10-13 mm long; filaments subequal, erect or spreading; ovary with 4 ovules per cell. Capsule globose, ca. 8 mm in diam., persistent perianth-base wide, slightly scalloped. Seeds tetrahedral,3-5 mm in diam.
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Rhizomatous perennial to 70 cm, often in clumps, roots many, thick. Leaves clumped, linear, erect. Flowers congested in an unbranched raceme, white. Fruits on very long, deflexed pedicels.