Thysanotus vernalis Brittan

Rootstock small; roots tuberous; tubers ellipsoidal, c. 2.5 cm long. Leaves annual, 1 or 2, ±linear, channelled, 10-25 cm long, tuberculate-margined. Inflorescence paniculate, 14-35 cm long, dichotomously branched; umbels 2-6-flowered; pedicels 4-5 mm long, articulated near base, nodding in fruit. Perianth segments 10 mm long. Sepals narrowly lanceolate, 1.5 mm wide, mucronate. Petals elliptic, c. 5 mm wide; fimbriae 4-5 mm long. Stamens 6; anthers twisted, 3 outer 2.5-3 mm long, 3 inner 4 mm long. Style 3.5 mm long. Seeds not seen.

Grows in sandplain vegetation dominated by mallee eucalypts, and in Wandoo (Eucalyptus wandoo ) woodland in sandy clay over heavy clay subsoil.