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Grevillea
Also called Spider Flower, Australian Oaks, Grevilleas
Grevillea is a large genus of about 360 mostly Australian evergreen shrubs, rarely small trees, grown for their spidery flowers. Good drainage and full sun are the keys to growing the commonly cultivated species.
Grevillea (), commonly known as spider flowers, is a genus of about 360 species of evergreen flowering plants in the family Proteaceae. Plants in the genus Grevillea are shrubs, rarely trees, with the leaves arranged alternately along the branches, the flowers zygomorphic, arranged in racemes at the ends of branchlets, and the fruit a follicle that splits down one side only, releasing one or two seeds.
Some commonly cultivated grevilleas including fuchsia grevillea, (G. bipinnatifida) G. banksii and related cultivars and hybrids contain toxic cyanide. The greatest concentration of cyanoglucosides is found in the flowers, immature leaves, immature seeds and seedlings.
Species including G. banksii and the common cultivar Grevillea 'Robyn Gordon' are responsible for allergic contact dermatitis as they contain pentadecylresorcinol (adipostatin A) and tridecylresorcinol, also known as grevillol. These compounds are chemically similar to urushiol, a compound which causes skin rashes and is found in poison ivy and other members of the Toxicodendron genus.
Grevilleas grow in most habitats, although few grow in alpine areas, in swamps or saline soils. Most species are endemic to Australia but four species grow in New Guinea, (G. papuana is endemic), ten are endemic to New Caledonia and one species (G. elbertii) is endemic to Sulawesi in Indonesia.
Grevillea aspleniifolia · Grevillea baileyana · Kahiliflower · Grevillea baueri · Fuchsia grevillea · Golden Grevillea · Grevillea curviloba · Grevillea ×gaudichaudii · Grevillea glossadenia · Spreading Grevillea · Grevillea iaspicula · Juniper Leaf Grevillea
Text excerpted from the Wikipedia article Grevillea by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
