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Isopogon trilobus, commonly known as barrel coneflower, is a species of flowering plant in the family Proteaceae and is endemic to South Coast Western Australia. It is a shrub with wedge-shaped leaves with lobed or toothed margins, and oval, spherical or barrel-shaped heads of cream-coloured to yellow flowers.
Sensitive to Phytophthora cinnamomi dieback, I. trilobus requires excellent drainage and full sun. It will likely not tolerate humid climates. Grafting onto eastern species such as I. anethifolius or I. dawsonii could render it more adaptable to a wider climatic range. Its dense habit and large fruit give it its horticultural potential.
Barrel coneflower is widespread from the Stirling Range east to Israelite Bay along the south coast of Western Australia where it grows on sandplains, dunes or rocky outcrops, on sandy soils, sometimes over laterite, in heathland or shrubland communities.
Spider Coneflower · Elkhorn Coneflower · Broad Leaf Drumsticks · Narrow-leaf Drumsticks · Isopogon asper · Isopogon attenuatus · Isopogon axillaris · Stirling Range Coneflower · Isopogon buxifolius · Horny Cone Bush · Isopogon crithmifolius · Isopogon cuneatus
Text excerpted from the Wikipedia article Isopogon trilobus by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
