Grevillea amplexans | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Proteales |
Family: | Proteaceae |
Genus: | Grevillea |
Species: | G. amplexans
|
Binomial name | |
Grevillea amplexans | |
Subspecies | |
|
Grevillea amplexans is a species of flowering plant in the family Proteaceae and is endemic to the Mid West region of Western Australia. It is a spreading shrub with arching branches, stem-clasping, sharply-pointed, lobed or toothed leaves and white to cream-coloured flowers.
Grevillea amplexans is a spreading shrub that typically grows to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and has arching branches. Its leaves are 7–26 mm (0.28–1.02 in) long, 10–35 mm (0.39–1.38 in) wide and star-shaped or egg-shaped with three to seven lobes or five to eleven teeth on the edges, and a stem-clasping base. The flowers are arranged in more or less spherical to domed groups on the ends of branches. The flowers are white to cream-coloured and glabrous, the pistil 2.5–5.8 mm (0.098–0.228 in) long with a white style. Flowering occurs from July to December and the fruit is an oblong follicle 9–12 mm (0.35–0.47 in) long. [3] [4]
Grevillea amplexans was first formally described in 1870 by George Bentham from an unpublished description by Ferdinand von Mueller in Flora Australiensis. [5] The specific epithet (amplexans) means "encircling" or "embracing", referring to the base of the leaves. [6]
In 2000, Makinson and Wilson described three subspecies in the Flora of Australia, and the names are accepted by the Australian Plant Census:
(Grevillea amplexans subsp. adpressa was first formally described in 1993 by Olde and Marriott who gave it the name Grevillea adpressa in the journal Nuytsia.) [16] [17]
This grevillea grows in sand on sandplains between Geraldton, Coomberdale and Moora in the Avon Wheatbelt, Geraldton Sandplains and Swan Coastal Plain biogeographic regions of Western Australia. [4] Subspecies adpressa grows in low heath between Mingenew and Watheroo, [8] [9] and subsp. amplexans grows in heathland or mallee-shrubland [11] [12] and subsp. semivestita occurs in shrubland and heath from Watheroo National Park to near Carnamah. [14] [15]
Grevillea amplexans is listed as an endangered species by the International Union for Conservation of Nature, due to having an area of occupancy less than 200 km2, a severely fragmented range and a continuing decline of habitat due to ongoing clearance of roadside verges. Other potential threats to the species include altered fire regimes and competition with invasive weed species. [1]
Subspecies amplexans is classified as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [12] but subsp. adpressa is listed as " Priority One" meaning that it is known from only one or a few locations which are potentially at risk, [18] and subsp. semivestita as " Priority Two" [15] meaning that it is poorly known and from only one or a few locations. [18]
Grevillea amplexans | |
---|---|
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Proteales |
Family: | Proteaceae |
Genus: | Grevillea |
Species: | G. amplexans
|
Binomial name | |
Grevillea amplexans | |
Subspecies | |
|
Grevillea amplexans is a species of flowering plant in the family Proteaceae and is endemic to the Mid West region of Western Australia. It is a spreading shrub with arching branches, stem-clasping, sharply-pointed, lobed or toothed leaves and white to cream-coloured flowers.
Grevillea amplexans is a spreading shrub that typically grows to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and has arching branches. Its leaves are 7–26 mm (0.28–1.02 in) long, 10–35 mm (0.39–1.38 in) wide and star-shaped or egg-shaped with three to seven lobes or five to eleven teeth on the edges, and a stem-clasping base. The flowers are arranged in more or less spherical to domed groups on the ends of branches. The flowers are white to cream-coloured and glabrous, the pistil 2.5–5.8 mm (0.098–0.228 in) long with a white style. Flowering occurs from July to December and the fruit is an oblong follicle 9–12 mm (0.35–0.47 in) long. [3] [4]
Grevillea amplexans was first formally described in 1870 by George Bentham from an unpublished description by Ferdinand von Mueller in Flora Australiensis. [5] The specific epithet (amplexans) means "encircling" or "embracing", referring to the base of the leaves. [6]
In 2000, Makinson and Wilson described three subspecies in the Flora of Australia, and the names are accepted by the Australian Plant Census:
(Grevillea amplexans subsp. adpressa was first formally described in 1993 by Olde and Marriott who gave it the name Grevillea adpressa in the journal Nuytsia.) [16] [17]
This grevillea grows in sand on sandplains between Geraldton, Coomberdale and Moora in the Avon Wheatbelt, Geraldton Sandplains and Swan Coastal Plain biogeographic regions of Western Australia. [4] Subspecies adpressa grows in low heath between Mingenew and Watheroo, [8] [9] and subsp. amplexans grows in heathland or mallee-shrubland [11] [12] and subsp. semivestita occurs in shrubland and heath from Watheroo National Park to near Carnamah. [14] [15]
Grevillea amplexans is listed as an endangered species by the International Union for Conservation of Nature, due to having an area of occupancy less than 200 km2, a severely fragmented range and a continuing decline of habitat due to ongoing clearance of roadside verges. Other potential threats to the species include altered fire regimes and competition with invasive weed species. [1]
Subspecies amplexans is classified as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [12] but subsp. adpressa is listed as " Priority One" meaning that it is known from only one or a few locations which are potentially at risk, [18] and subsp. semivestita as " Priority Two" [15] meaning that it is poorly known and from only one or a few locations. [18]