Thysanotus nudicaulis

Thysanotus nudicaulis is a perennial herb with a small rhizome and tuberous roots, the tubers 20–60 mm (0.79–2.36 in) long and 5–6 mm (0.20–0.24 in) wide and 30–80 mm (1.2–3.1 in) from the stock. Its one or two leaves are terete to slightly angled, about 120–300 mm (4.7–11.8 in) long but that wither before flowering. The flowers are borne in a single umbel of up to four on a flowering stem 120–500 mm (4.7–19.7 in) long, each flower on a pedicel 7–10 mm (0.28–0.39 in) long. The flowers are purple, the perianth segments 13–17 mm (0.51–0.67 in) long. The sepals are narrowly linear, about 1.5–3 mm (0.059–0.118 in) wide and the petals are elliptic, 4.5–6 mm (0.18–0.24 in) wide with a fringe about 2–4 mm (0.079–0.157 in) wide. There are six stamens, the anthers twisted, the outer ones about 3–4 mm (0.12–0.16 in) long and the inner anthers about 7.5–10 mm (0.30–0.39 in) long and curved. The style is curved, 7.5–10 mm (0.30–0.39 in) long. Flowering occurs in November and December.

This species of Thysanotus grows in sandy heath with mallee eucalypts along the Great Australian Bight, from east of Ravensthorpe to Mount Ragged in the Cape Arid National Park in Western Australia, and at the southern tip of the Eyre Peninsula of South Australia.