Caladenia bicalliata

Caladenia bicalliata is a plant in the orchid family Orchidaceae and is native to the south-west of Western Australia and coastal areas of South Australia. It has a single erect, hairy leaf and one or two cream-coloured flowers. There are two subspecies differing in the size and colour of the flowers.
Description.
"Caladenia bicalliata" is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf long and wide. The inflorescence is a raceme, high with up to three flowers, each flower long and wide. The dorsal sepal is erect and abruptly narrows about one-third of its length from the base. The lateral sepals and petals are cream or greenish-cream and are much shorter than those of the similar "C. abbreviata" and "C. evanescens". The dorsal sepals and petals have reddish-brown or pale yellow tips, depending on subspecies. The labellum is white, sometimes with red stripes and has two rows of white calli along its centre. Flowering occurs between August and early October but the flowers are only open for a day or two or may not open at all.
Taxonomy and naming.
"Caladenia bicalliata" was first formally described by Richard Rogers in 1909 from a specimen collected at Kingscote on Kangaroo Island. The description was published in "Transactions, proceedings and report, Royal Society of South Australia". The specific epithet ("bicalliata") refers to the two rows of calli on the labellum of this species.
There are two subspecies:
Distribution and habitat.
This spider orchid occurs in a narrow coastal strip, growing in calcareous soil between Kalbarri and Esperance in Western Australia and along the south-east coast but sometimes up to inland in South Australia.
Conservation.
"Caladenia bicalliata" is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.