Small terrestrial to 5 cm tall. Leaves ovate, to 10 cm long, to 3.5 cm wide, held at ground level. Flowers to 35 mm wide, greenish to purplish, labellum calli black; spring to summer. Lateral sepals curved forwards. Petals broad, incurved. Labellum heart-shaped, calli 1?6, confined to basal part of lamina.

SE Australia.

C. valida is still often confused with C. gunnii Lindl., but the latter has smaller flowers and is confined to Tasmania.

C. ה pescottiana R.S. Rogers from SE Australia is a hybrid between C. trapeziformis and C. valida and exhibits characters intermediate between the two.The elliptic labellum with an ant-like cluster of calli on the base is distinctive. All are difficult to grow.

Source: Jeanes, J. (2005). Orchidaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.