Sandplain white spider orchid

Description

Caladenia speciosa is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf, 150–250 mm (6–10 in) long and 5–12 mm (0.2–0.5 in) wide. Up to three flowers 120–180 mm (5–7 in) long and 100–150 mm (4–6 in) wide are borne on a stalk 350–600 mm (10–20 in) tall. The flowers are white, often with a pink or red tinge. The sepals and petals have long, thin, brownish thread-like tips. The dorsal sepal is erect, 80–130 mm (3–5 in) long and 2–4 mm (0.08–0.2 in) wide. The lateral sepals are 80–150 mm (3–6 in) long and 5–9 mm (0.2–0.4 in) wide, spread widely and horizontally near their base but then curve downwards.