Cormous geophyte, 80-150 mm tall, stem inclined, smooth, occasionally branched. Leaves lanceolate, sheaths cobwebby, blade sword-shaped, undulate with wavy margins, twisted above, midrib prominent, smooth or margins ciliate. Flowers 76-127 mm a horizontal secund spike, bilabiate, pale yellow, or flushed mauve, with yellow-green nectar guides, perianth tube ± 7 mm long, dorsal tepal 20-25 mm long, ovary smooth, bracts smooth, inner forked in upper third. June-early Aug.