Rhyolite is a volcanic rock (known as ‘streaming rock’ because of the flow bands) which has a high silica content and includes pumice and obsidian.
This species was previously considered part of the Grevillea victoriae complex.
Genus: After Charles Francis Greville, 1749-1809, co-founder of the Horticultural Society, London, later the Royal Horticultural Society.
Species: Refers to the habitat of the plant on rock outcrops of rhyolite.