Slender terrestrial to 30 cm tall. Leaf lanceolate, to 10 cm long, to 1 cm wide, erect. Flowers 1?3, to 5 cm wide, mostly mauve or purple, white at base; spring. Sepals and petals ovate to lanceolate. Labellum ovate with a pointed tip, calli entirely fused except for a notch at tip.

SE Australia.

G. minor R. Br. from SE Australia is similar to G. major but has smaller flowers with the labellum calli fused at the base only.

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.