Grevillea gariwerdensis is a species of the plant genus Grevillea

Grevillea

Grevillea is a diverse genus of about 360 species of evergreen flowering plants in the protea family Proteaceae, native to Australia, New Guinea, New Caledonia, and Sulawesi. It was named in honour of Charles Francis Greville. The species range from prostrate shrubs less than 0.5 m tall to trees...

. It is endemic to Victoria

Victoria (Australia)

Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

 in Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. The species grows as a low, suckering shrub, between 0.3 and 1 metre in height. Flowers usually appear between October and January (mid spring to mid summer) in its native range. These have perianth

Perianth

The term perianth has two similar but separate meanings in botany:* In flowering plants, the perianth are the outer, sterile whorls of a flower...

s and style

Gynoecium

Gynoecium is most commonly used as a collective term for all carpels in a flower. A carpel is the ovule and seed producing reproductive organ in flowering plants. Carpels are derived from ovule-bearing leaves which evolved to form a closed structure containing the ovules...

s which are white to pink.
It is very similar in appearance to both Grevillea micrantha

Grevillea micrantha

Grevillea micrantha, also known as Small-flower Grevillea, is a shrub species which is endemic to Victoria, Australia. It grows to between 0.3 and 0.6 metres in height and has narrow leaves that are 1 to 4 cm in length and 0.6 to 1 mm in width...

and Grevillea parviflora

Grevillea parviflora

Grevillea parviflora is a shrub species in the family Proteaceae. It is native to the state of New South Wales in Australia. There are two subspecies:*G. parviflora subsp. parviflora,*G. parviflora subsp. supplicans...

. The name Grevillea linearifolia

Grevillea linearifolia

Grevillea linearifolia is a shrub endemic to New South Wales, Australia.-Description:It grows as an upright, open shrub from one to two or sometimes three metres high. It has angular, ridged branchlets and long, straight leaves from three to eleven centimetres long, and one to five millimetres...

has been misapplied to this species in the past.

The species occurs on sandy soils in low moist heaths within Grampians National Park

Grampians National Park

The Grampians National Park is a national park in Victoria, Australia, 235 kilometres west of Melbourne. The Park was listed on the Australian National Heritage List on 15 December 2006 for its outstanding natural beauty and being one of the richest indigenous rock art sites in south-eastern...

. The species is listed as "Poorly known in Victoria" on the Department of Sustainability and Environment's Advisory List of Rare Or Threatened Plants In Victoria.