VRiv, NIS, HNF.
2 subspecies; 1 subspecies in Victoria. Grevillea ramosissima subsp. ramosissima occurs in New South Wales adjacent to north-east Victoria where G. ramosissima subsp. hypargyrea occurs. G. ramosissima subsp. ramosissima can be distinguished from G. ramosissima subsp. hypargyrea by the hairs on the lower leaf surface which are twisted. In G. ramosissima subsp. hypargyrea the hairs on the lower leaf surface are straight.