Swainsona maccullochiana
Swainsona maccullochiana, commonly known as Ashburton pea, is a species of flowering plant in the family Fabaceae. It is an upright annual with purple-reddish, pink or bluish  pea-like flowers  from spring to summer and is endemic to Western Australia.

Description
Swainsona maccullochiana is an upright, single-stemmed herbaceous annual to  high. The stems are over  wide, sturdy, ribbed, needle-shaped, densely covered with fine, spreading  hairs up to  long that taper to a tip. The leaves up to  long with 15-31 broadly egg-shaped to oval-shaped leaflets usually  long,  wide, apex usually pointed, occasionally  rounded or notched. The 20-40 purplish-reddish, pink or bluish or sometimes white pea-like flowers are borne in racemes of differing age on a peduncle over  wide, pedicels about  long. The standard petal about  long,  wide, the wings about  long and the keel  deep. Flowering occurs from July to October and the fruit  long, over  wide and elliptic-shaped.

Taxonomy and naming
Swainsona maccullochiana was first formally described in 1869 by Ferdinand von Mueller and the description was published in Fragmenta Phytographiae Australiae.The specific epithet (maccullochiana) is in honour of James McCutcheon.

Distribution and habitat
Ashburton pea grows in moist, low lying areas near watercourses on loam in central Western Australia.

References

maccullochiana
Fabales of Australia
Flora of Western Australia
Taxa named by Ferdinand von Mueller