Thysanotus pyramidalis Brittan

Rootstock small; roots tuberous; tubers ellipsoidal, c. 3-4 cm long, ±sessile. Leaves 6-8, linear, flat, 12-16 cm long, c. 1 mm wide, withering near flowering time. Inflorescence paniculate, pyramidal, 18-30 cm long; scape basally hirsute; flowers usually single; pedicels 3-4 mm long, articulated near base. Perianth segments 9-10 mm long. Sepals lanceolate, 2 mm wide, with reflexed mucro. Petals elliptic, 4-4.5 mm wide; fimbriae c. 1 mm long. Stamens 6; anthers dehiscing by slits, 3 outer c. 3.5 mm long, 3 inner c. 4 mm long and slightly curved. Style c. 5 mm long. Seeds ellipsoidal, l.5 mm long, 1 mm diam.; aril dark straw-coloured.

Grows in sandplain and in Mulga (Acacia aneura ) communities, in sandy or occasionally heavier sandy clay soils.