Diels grevillea

Description

Grevillea dielsiana, commonly known as Diels grevillea,is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a spreading shrub with divided leaves, the end lobes linear and tapering, and groups of red or orange flowers, often with streaks of pink or cream. Grevillea dielsiana is a spreading shrub that typically grows to a height of 0.6–2 m (2 ft 0 in – 6 ft 7 in) and has glaucous branchlets. The leaves are 30–80 mm (1.2–3.1 in) long and have three lobes, each usually with three further lobes, the end lobes linear and tapering, 2–25 mm (0.079–0.984 in) long and 0.8–1.3 mm (0.031–0.051 in) wide. The flowers are arranged in groups on a rachis 20–40 mm (0.79–1.57 in) long and are red to orange, often with streaks of pink or cream, the pistil 26.5–36 mm (1.04–1.42 in) long. The style is red or pink, pale pink or white near the tip. Flowering occurs from August to September and the fruit is oblong to elliptic follicle 10–15 mm (0.39–0.59 in) long. Grevillea dielsiana in 1943 by Charles Gardner in the Journal of the Royal Society of Western Australia in 1856, from material he collected near the Murchison River. The specific epithet (dielsiana) honours Ludwig Diels. Diels grevillea grows in heath or shrubland between Geraldton, Mullewa and Shark Bay in the Avon Wheatbelt, Geraldton Sandplains and Yalgoo biogeographic regions of south-western Western Australia. Grevillea dielsiana is listed as "not threatened" by the Western Australian Government Department of Parks and Wildlife Plants in the genus Grevillea are shrubs, rarely small trees with simple or compound leaves arranged alternately along the branchlets. The flowers are zygomorphic and typically arranged in pairs along a sometimes branched raceme at the ends of branchlets. The flowers are bisexual, usually with four tepals in a single whorl. There are four stamens and the gynoecium has a single carpel. The fruit is a thin-walled follicle that splits down only one side, releasing one or two seeds before the next growing season. The genus Grevillea was first formally described in 1809 by Joseph Knight from an unpublished manuscript by Robert Brown. Knight gave the spelling Grevillia, corrected by Brown in 1810 to Grevillea in Transactions of the Linnean Society of London.The genus was named in honour of Charles Francis Greville, an 18th-century patron of botany and co-founder of the Royal Horticultural Society.