Kingdom Plantae Family Proteaceae Rank Species | Order Proteales Genus Grevillea | |
Similar Grevillea microstegia, Grevillea floripendula, Grevillea montis‑cole, Grevillea celata, Grevillea pilosa | ||
Grevillea dimidiata, also known as the caustic bush or willings tree, is a small tree or shrub which is endemic to Western Australia.
The single stemmed plant typically grows to a height of 2 to 6 metres (7 to 20 ft) and as high as 12 metres (39 ft). It has simple leaves to a length of 9 to 22 centimetres (4 to 9 in) and a width of 3 to 5.5 cm (1.2 to 2.2 in). It produces a white-cream inflorescence at end of the branch from May to October. Lens shaped smooth or wrinkled fruit are then produced which are 16 to 23 mm (0.63 to 0.91 in) long. It will produce seeds after 4 or 5 years of age.
It is found the Kimberley region of Western Australia and in the Northern Territory. G. dimidiata has a habitat of scrubland or grassland and grows in rocky or sandy soils and on rocky outcrops.
The plant has a typical lifespan of 11 to 20 years and is well adapted to fires in its environment. Adult plants will undergo epicormic resprouting after a fire.