About Caladenia dimorpha Fitzg.
Caladenia dimorpha Fitzg. is a terrestrial, perennial, deciduous herb that grows from an underground tuber. It produces a single, sparsely hairy leaf that can reach up to 18 cm (7 in) long and 5 mm (0.2 in) wide. Between one and three white flowers, often marked with pink or purplish patches, grow on a sparsely hairy flowering spike that grows up to 30 cm (10 in) high. The dorsal sepal of this orchid is approximately 15 mm (0.6 in) long and curves forward to form a hood that covers the column. The lateral sepals and petals can reach up to 20 mm (0.8 in) long; their back surfaces are greenish and covered in scattered glandular hairs, while the front surfaces of petals and sepals are glabrous. The labellum is broadly egg-shaped, around 8 mm (0.3 in) long, mostly white, and sometimes has a dark red or purplish tip. Thin, finger-like teeth run along most of the length of the labellum's sides. Four rows of club-shaped calli, ranging in color from white to yellow, are arranged along the labellum's mid-line, becoming clumped and purple closer to the labellum's tip. The column has broad wings and red stripes. Flowering of Caladenia dimorpha takes place between September and October. This uncommon caladenia grows in forest habitats, occurring in the western Blue Mountains of Australia, with its range extending almost to the Victorian border.
