Description The Arrowsmith Spider Orchid is a perennial terrestrial orchid native to Western Australia. The plant flowers is spring from August to September. It has bright yellowish green sepals and petals. The third petal or labellum is maroon red in the centre and green at either side with prominent marginal teeth. The inside of the flower is white with pinkish red spots and blotches. The plant grows from a tuber and has a single narrow grass like leaf from the base. The flower stem grows to about 50 cm in height.
Habitat grows on sandy or loamy soil on heathland, woodland, forest and sandplains. The plant has a single leaf growing from the base
Distribution Caladenia crebra is found in western parts of Western Australia south of Geraldton.