Grevillea divaricata | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Proteales |
Family: | Proteaceae |
Genus: | Grevillea |
Species: | G. divaricata |
Binomial name | |
Grevillea divaricata | |
Grevillea divaricata is a possibly extinct species of flowering plant in the family Proteaceae and is endemic to central New South Wales. It is a low shrub with linear leaves and small clusters of flowers on the ends of branchlets. It is only known from the type specimen, discovered in 1823. No live specimens have been found since then.
Grevillea divaricata is a shrub that typically grows to a height of up to about 40 cm (16 in) and sometimes forms a lignotuber. It has spreading, linear leaves, 8–13 mm (0.31–0.51 in) long and 0.5–0.6 mm (0.020–0.024 in) wide with the edges rolled under, obscuring the lower surface. The upper surface of the leaves is rough to the touch. The flowers are arranged on the ends of branches in loose clusters of up to four on a glabrous rachis 2–6 mm (0.079–0.236 in) long, the pistil about 16 mm (0.63 in) long. The flowers are probably red or red and cream-coloured. Flowering was recorded in April. [3] [4] [5]
This grevillea is similar to G. rosmarinifolia but has spreading (rather than erect) leaves, rough (rather than mostly smooth) leaves, and sometimes forms a lignotuber (never present with G. rosmarinifolia). [4]
Grevillea divaricata was first formally described in 1830 by Robert Brown in the Supplementum primum prodromi florae Novae Hollandiae from specimens collected by Allan Cunningham in mountains north of Bathurst in 1823. [6] [7] The specific epithet (divaricata) means "widely spreading". [8]
Grevillea divaricata is only known from the type location north of Bathurst where it grew in open forest. [1] [3] [5]
Grevillea divaricata is listed as critically endangered, possibly extinct on the IUCN Red List. It is only known from the type specimen that was found north of Bathurst in 1823. Since then, no additional confirmed specimens have ever been found. This, along with the clearing of a vast majority of natural vegetation in the area it was discovered lead to the possibility that this species may be extinct, although there is insufficient evidence to determine the likelihood of extinction in this species. [1]
If the species still exists, it likely persists in severely fragmented and small populations and would be threatened by habitat loss, grazing from livestock and feral herbivores and changed fire regimes. Only 3% of the natural vegetation within the known extent of occurrence remains. Assuming the species has not already gone extinct, it is highly susceptible to extinction via stochastic processes due to its presumed low population and restricted distribution. [1] [4]
This grevillea is also listed as "endangered" under the New South Wales Government Biodiversity Conservation Act 2016 . [4] [5]
Grevillea longifolia, commonly known as fern-leaf spider flower, is a species of flowering plant in the family Proteaceae and is endemic to the Sydney Basin in New South Wales. It is an erect to spreading shrub with narrowly egg-shaped to almost linear leaves, and toothbrush-like groups of pinkish-fawn flowers with a pink to red style. It is fairly readily grown in gardens.
Grevillea lanigera, commonly known as woolly grevillea, is a species of flowering plant in the family Proteaceae and is endemic to south-eastern continental Australia. It is a spreading shrub with narrowly oblong to more or less linear leaves and clusters of pink to red, and cream-coloured flowers.
Grevillea bipinnatifida, commonly known as fuchsia 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, usually with bipinnatifid leaves and loose clusters of dull pink to crimson flowers.
Grevillea crithmifolia is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a dense shrub with linear leaves, divided leaves with narrowly oblong lobes, or both, and clusters of pale pink to creamy-white flowers.
Grevillea caleyi, also known as Caley's grevillea, is a critically endangered species of flowering plant in the family Proteaceae and is endemic to a restricted area around the Terrey Hills and Belrose area in New South Wales. It is an open, spreading shrub, growing up to 4 m (13 ft) tall with deeply divided leaves with linear lobes, and fawn flowers with a maroon to red style.
Grevillea agrifolia, the blue grevillea, is a species of flowering plant in the family Proteaceae and is native to the north of Western Australia and parts of the Northern Territory. It is a shrub or tree with narrowly oblong leaves with the narrower end towards the base, and creamy-yellow flowers.
Grevillea pectinata, commonly known as comb-leaf grevillea, is a species of flowering plant in the family Proteaceae and is endemic to the south of Western Australia. It is a spreading shrub with divided, comb-like leaves and mauve-pink to red and cream-coloured to yellow flowers with a red to deep pink style.
Grevillea ilicifolia, commonly known as holly grevillea or holly bush, is a species of flowering plant in the family Proteaceae and is endemic to southern continental Australia. It is a spreading to prostrate shrub with holly-like leaves with sharply-pointed triangular to egg-shaped teeth or lobes, and clusters of green to cream-coloured and mauve flowers with a pink to red style.
Grevillea floribunda, commonly known as seven dwarfs grevillea, is a species of flowering plant in the family Proteaceae and is endemic to eastern Australia. It is a spreading shrub with oblong to egg-shaped leaves with the narrower end towards the base and groups of six to twenty flowers covered with rusty brown hairs.
Grevillea obtusiflora is a species of flowering plant in the family Proteaceae and is endemic to a small area of eastern New South Wales. It is a low, spreading to erect shrub with many stems, narrowly elliptic to oblong or linear to narrowly egg-shaped leaves with the narrower end towards the base, and pinkish-red and cream-coloured flowers with a red style.
Persoonia curvifolia is a plant in the family Proteaceae and is endemic to central New South Wales. It is an erect to spreading shrub with linear leaves and somewhat hairy yellow flowers.
Grevillea triternata is species of flowering plant in the family Proteaceae and is endemic to New South Wales. It is a dense, compact shrub with divided leaves, the end lobes sharply pointed, linear to narrowly triangular, and cylindrical clusters of white flowers with a cream-coloured to pale yellow style.
Grevillea depauperata is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a low, dense, spreading shrub with oblong or egg-shaped leaves and clusters of red to orange flowers.
Grevillea fasciculata is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a low, often spreading shrub with narrowly elliptic to more or less linear leaves and erect clusters of red and orange or orange and yellow flowers.
Grevillea anethifolia, commonly known as spiny cream spider flower, is a species of flowering plant in the family Proteaceae and is endemic to continental Australia. It is an erect shrub with hairy branchlets, lobed leaves, the lobes sharply pointed, and white to pale yellow or cream-coloured flowers.
Grevillea baxteri, commonly known as the Cape Arid grevillea, is a flowering plant of the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect to spreading shrub with pinnatipartite leaves and greenish to fawn or creamy-orange flowers.
Grevillea cunninghamii is a species of flowering plant in the family Proteaceae and is endemic to the north of Western Australia. It is a shrub with egg-shaped leaves with sharply-pointed teeth on the edges, and clusters of red flowers.
Hakea fraseri, is a species of shrub or small tree commonly known as the corkwood oak, is a shrub in the family Proteaceae and is endemic to northern New South Wales. It has furrowed bark, pendulous foliage and creamy-white flowers in spring.
Petrophile divaricata is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a shrub with bipinnate, sharply-pointed leaves, and oval to oblong heads of hairy, yellow flowers.
Grevillea angulata is a species of flowering plant in the family Proteaceae and is endemic to the Top End of the Northern Territory. It is a spreading to erect shrub with pinnatifid or toothed leaves and cream-coloured flowers.