Silver Oak Plant

Description

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Grevillea robusta, commonly known as the southern silky oak, silk oak, or silky oak, silver oak, or Australian silver oak, is a flowering plant in the family Proteaceae.

It is a tree, the largest species in its genus but is not closely related to the true oaks, Quercus. It is a native of eastern coastal Australia, growing in riverine, subtropical, and dry rainforest environments

Grevillea robusta is a fast-growing evergreen tree with a single main trunk, growing to 5–40 m (20–100 ft) tall. The bark is dark grey and furrowed. Its leaves are fern-like, 10–34 cm (4–10 in) long, 9–15 cm (4–6 in) wide, and divided between 11 and 31 main lobes.

The flowers are arranged in one-sided, “toothbrush”-like groups, sometimes branched, 12–15 cm (5–6 in) long. The carpel (the female part) of each flower has a stalk 21–28 mm (0.8–1 in) long. The flowers are glabrous and mostly yellowish-orange, or sometimes reddish. Flowering occurs from September to November and the fruit that follows is a glabrous follicle.