Leaves 30-100 cm × 4-30 mm. Scape 30-90 cm, smooth. Flowers: perianth lavender, 16-27 mm, tube funnelform-campanulate, acute at base, 7-12 mm, lobes erect, 9-15 mm; stamens attached alternately at 2 levels, equal; filaments triangular, widest at base, 2 mm, apical appendages absent; anthers purple, 1.5 mm; ovary white, equal to stipe; pedicel 3-8 cm. 2n = 16.

Flowering spring (Mar--Apr). Damp clefts, rocky walls, coastal sage scrub; of conservation concern; 0--200 m; Calif.

This is the only species of Triteleia occurring on any of the islands off the southern California coast; it is endemic to San Clemente Island.