Boronia decumbens is a plant in the citrus family Rutaceae and is endemic to northern parts of the Northern Territory. It is a low, spreading shrub with pinnate leaves and white to pink flowers with the four sepals larger than the four petals.
Boronia decumbens is a low, spreading (decumbent) shrub that grows to 10sigfig=1NaNsigfig=1 high and 40sigfig=1NaNsigfig=1 wide. Its branches and leaves and some flower parts are moderately hairy. The leaves are NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide in outline with five or seven linear to narrow elliptic leaflets. The end leaflet is NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide and the side leaflets are NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide. The flowers are sessile and arranged singly in leaf axils. The flowers are white to pink, the sepals larger than the petals. The four sepals are triangular, NaNsigfig=2NaNsigfig=2 long and NaNsigfig=1NaNsigfig=1 wide but increase in size as the fruit develops. The four petals are NaNsigfig=2NaNsigfig=2 long and NaNsigfig=1NaNsigfig=1 wide. Flowering occurs from November to August.[1]
Boronia decumbens was first formally described in 1997 by Marco Duretto who published the description in Nuytsia.[2] [3] The specific epithet (decumbens) is a Latin word meaning "lying down" or "reclining",[4] referring to the usual habit of this species.
This boronia grows in woodland in Kakadu National Park north of the Mary River and the Waterfall Creek turnoff.[5]