Caladenia filifera, commonly known as the blood spider orchid, is a species of orchidendemic to the south-west of Western Australia. It has a relatively common orchid in its natural range, often forming clumps, and has a single hairy leaf and up to three blood-red flowers.
Caladenia filifera is a terrestrial, perennial, deciduous, herb with an underground tuber and which often forms clumps or tufts. It has a single erect, hairy leaf, Шаблон:Convert long and Шаблон:Convert wide. Up to three blood red flowers Шаблон:Convert long and Шаблон:Convert wide are borne on a stalk Шаблон:Convert high. The dorsal sepal is erect, Шаблон:Convert long and Шаблон:Convert wide at the base. The lateral sepals and petals are a similar size and shape to dorsal sepal but are held horizontally near their bases then taper to thin, wispy, drooping tips. The labellum is Шаблон:Convert long and Шаблон:Convert wide and is entirely blood red with a few darker marks, sometimes white near its base. The sides of the labellum have short, blunt teeth, its tip is curved downwards and there are two rows of anvil-shaped calli along its centre. Flowering occurs from August to October.[1][2][3]
The blood spider orchid occurs near Watheroo in the Avon Wheatbelt, and Jarrah Forestbiogeographic regions where it grows in well-drained soils in forest and scrubland. Its flowering is stimulated by fires in the previous summer. It previously was more widespread but its distribution has been reduced due to changes in fire regimes.[1][2][3][7]
