Grevillea wickhamii, commonly known as Wickham's grevillea, holly-leaf grevillea or lgarrmari in Djaru, is species of flowering plant in the family Proteaceae and is endemic to northern Australia. It is an erect shrub or spindly tree with holly-like, broadly egg-shaped leaves with 2 to 7 shallow teeth, and down-curved clusters of flowers, the colour depending on subspecies.

Description

Grevillea wickhamii is an erect shrub or spindly tree, that typically grows to a height of 1–6 m and has smooth bark. Its leaves are holly-like, broadly egg-shaped in outline, 30–90 mm long and 25–55 mm wide, with 2 to 7 shallow, pointed teeth near the tip of the leaves. The flowers are arranged in leaf axils or on the stems in down-curved, sometimes branched clusters, the end groups on a rachis mostly 10–70 mm long, each flower on a pedicel usually 2–6 mm long. Flower colour and flowering period vary with subspecies, and the pistil is 5–10 mm long. The fruit is an oblong, glabrous follicle 10–20 mm long.

Taxonomy

Grevillea wickhamii in 1856 by Carl Meissner in de Candolle's Prodromus Systematis Naturalis Regni Vegetabilis from specimens collected by John Clements Wickham of plants he collected in northern Australia during the Second voyage of HMS Beagle. The specific epithet (wickhamii) honours the collector of the type specimens. The names of 6 subspecies of G. wickhamii are accepted by the Australian Plant Census:

Distribution and habitat

Wickham's grevillea is widespread in northern Western Australia, in inland regions of the Northern Territory and in western Queensland.

Conservation status

All 6 subspecies of G. wickhamii are listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.