Species of shrub in the family Proteaceae endemic to south-eastern Australia
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Grevillea ramosissima, commonly known as fan grevillea, is a species of flowering plant in the family Proteaceae and is endemic to eastern continental Australia. It is a low, spreading shrub with lobed leaves and clusters of cream-coloured to pale yellow flowers.
Description.
"Grevillea ramosissima" is a low, spreading shrub that typically grows to a height of and often forms root suckers. The leaves are long and divided, usually with 3 to 11 lobes that are sometimes divided again, the end lobes more or less triangular to egg-shaped, mostly long and wide and sharply pointed. The edges of the leaves are turned down, and the lower surface is woolly-hairy. The flowers are arranged in conical to cylindrical clusters on a rachis long, the flowers at the base of the cluster opening first. The flowers are cream-coloured to pale yellow, the pistil long. Flowering mainly occurs in October and November and the fruit is a woolly-hairy follicle long.
Taxonomy.
In 1830, Robert Brown described "Anadenia caleyi" in the supplement to his "Prodromus Florae Novae Hollandiae et Insulae Van Diemen" from specimens collected by George Caley in 1804. In 1855, Carl Meissner moved "Anadenia caleyi" to the genus "Grevillea" but the name "Grevillea caleyi" had already been used for a different species. Meissner changed the name to "Grevillea ramosissima" in "Hooker's Journal of Botany and Kew Garden Miscellany". The specific epithet ("ramosissima") means "much-branched".
In 1994, Peter M. Olde and Neil R. Marriott described "G. ramosissima" subsp. "hypargyrea", and the name, and that of the autonym are accepted by the Australian Plant Census:
Subspecies "hypargyrea" had previously been known as "Grevillea ramosissima" var. "hypargyrea", first formally described in 1874 by Ferdinand von Mueller in his "Fragmenta Phytographiae Australiae". It is distinguished from subsp. "ramosissima" by the straight hairs on the lower surface of the leaves.
Subspecies "ramosissima" is distinguished from subsp. "hypargyrea" by the twisted hairs on the lower surface of the leaves.
Distribution and habitat.
Subspecies "hypargyrea" is endemic to Victoria, where it is found in a few isolated places near the upper Murray River in the far north of the state, growing in woodland on granite.
Subspecies "ramosissima" is endemic to New South Wales where it occurs on the coast, tablelands and slopes south from near Glen Innes and Tenterfield.
Conservation status.
Subspecies "hypargyrea" is listed as "endangered" under the Victorian Government "Flora and Fauna Guarantee Act 1988".
References.
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