Boronia excelsa is a plant in the citrus family Rutaceae and is endemic to a small area in Far North Queensland. It is an erect shrub with woolly-hairy branches, simple, stalkless, more or less hairless leaves, and pink to white, four-petalled flowers.
Boronia excelsa is an erect shrub with many woolly-hairy branches that grows to about a height of 3sigfig=1NaNsigfig=1. It has simple, elliptic, sessile leaves NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide. The leaves are much paler on the lower surface. The flowers are pink to white and are arranged singly in leaf axils on a pedicel NaNsigfig=1NaNsigfig=1 long. The four sepals are egg-shaped to triangular, about 3sigfig=1NaNsigfig=1 long, 1.5sigfig=1NaNsigfig=1 wide and densely woolly-hairy on the back. The four petals are NaNsigfig=2NaNsigfig=2 long and NaNsigfig=1NaNsigfig=1 wide, the eight stamens are hairy and the style is glabrous. Flowering occurs from July to August and the fruit is a glabrous capsule about 4.5sigfig=1NaNsigfig=1 long and 2sigfig=1NaNsigfig=1 wide.[1] [2]
Boronia excelsa was first formally described in 1999 by Marco F. Duretto who published the description in the journal Austrobaileya from a specimen collected on the Mount Windsor Tableland.[3] The specific epithet (excelsa) is a Latin word meaning "high" or "lofty"[4] referring to the higher altitudes where this species occurs.
This boronia grows in wet forests and near the edges of rainforest above 1000sigfig=1NaNsigfig=1 and is restricted to the Mount Windsor Tableland.
This boronia is classified as "least concern" by the Queensland Government Department of Environment and Heritage Protection.[5]