Thysanotus pyramidalis

Thysanotus pyramidalis is a perennial herb with a small rootstock, elliptic, more or less sessile tubers about 30–40 mm (1.2–1.6 in) long and six to eight linear, flat leaves 120–160 mm (4.7–6.3 in) long but that wither near flowering time. The flowers are usually borne singly in panicles on a flowering stem 180–300 mm (7.1–11.8 in) long, each flower on a pedicel 3–4 mm (0.12–0.16 in) long. The flowers are purple, the perianth segments 9–10 mm (0.35–0.39 in) long. The sepals are lance-shaped, about 2 mm (0.079 in) wide and the petals are elliptic, 4.0–4.5 mm (0.16–0.18 in) wide with a fringe 1 mm (0.039 in) long. There are six stamens, the outer three anthers, 3.5 mm (0.14 in) long, the inner three 4 mm (0.16 in) long and slightly curved. The style is curved, about 5 mm (0.20 in) long. Flowering occurs from August to October, and the seeds are elliptic, about 1.5 mm (0.059 in) long and 1.0 mm (0.039 in) in diameter with a dark, straw-coloured aril.

This species of Thysanotus grows in sand, loam, laterite and sandy clay, often in damp sites, in sandplain and mulga (Acacia aneura) communities from near Geraldton to the Three Springs area and near Perth, in the Avon Wheatbelt, Coolgardie, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Murchison and Yalgoo bioregions of south-western Western Australia.