Caladenia leucochila

Caladenia leucochila is a species of orchid endemic to the south-west of Western Australia. It has a single leaf and one or two pale yellow to greenish cream and white flowers with dull red stripes. it is a rare species, only known from near Collie.

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Caladenia leucochila is a terrestrial, perennial, deciduous, herb with an underground tuber and which grows as solitary plants. It has a single, erect leaf, 120–200 mm (5–8 in) long and 4–11 mm (0.2–0.4 in) wide with reddish-purple blotches near its base. One or two pale yellow to greenish cream and white flowers with dull red stripes 40–60 mm (1.6–2.4 in) in diameter are borne on a stalk 120–400 mm (5–20 in) tall. The sepals and petals are linear to lance-shaped for about half their length then suddenly narrow. The sepals, but usually not the petals, end with yellowish-brown, club-like glandular tips 10–12 mm (0.4–0.5 in) long. The dorsal sepal is erect but curves forward slightly, 25–35 mm (0.98–1.4 in) long and about 2 mm (0.08 in) wide. The lateral sepals are 35–40 mm (1–2 in) long and about 3 mm (0.1 in) wide and held close to horizontal, sometimes with a drooping tip. The petals are 25–30 mm (0.98–1.2 in) long and about 2 mm (0.08 in) wide, held like the lateral sepals and usually lack club-like tips. The labellum is 10–15 mm (0.4–0.6 in) long and 7–9 mm (0.28–0.35 in) wide and white with the tip rolled under. The sides of the labellum have long, forward-facing white or red linear teeth decreasing in size towards the front of the labellum. There are four to six rows of yellow or red hockey stick-shaped calli up to 1.5 mm (0.06 in) long along the centre line of the labellum but decreasing in size towards the tip. Flowering occurs from September to October.