Adenanthos glabrescens

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Adenanthos glabrescens
Adenanthos glabrescens subsp. exasperatus 6543.jpg
Adenanthos glabrescens subsp. exasperatus
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Adenanthos
Section: Adenanthos sect. Adenanthos
Species:
A. glabrescens
Binomial name
Adenanthos glabrescens
Subspecies

Adenanthos glabrescens is a species of small shrub endemic to the Ravensthorpe area in southwest Western Australia. First published in 1978, there are two subspecies.

Contents

Description

Adenanthos glabrescens grows as an erect shrub up to 70 cm in height. It has pinkish red or cream flowers, with a perianth tube about 22 mm long, and a style about 35 mm long. Leaves are usually entire and oval-shaped, but may rarely by lobed. They grow to 25 mm in length, and about 6 mm wide. [1] [2]

The species is quite similar to A. dobsonii , but the leaves of A. dobsonii retain an indumentum of soft hairs both long and short, whereas those of A. glabrescens have an indumentum of short hairs only, which is soon lost. [1]

Taxonomy

There are botanical collections attributable to this species dating back at least to 1924, but it was not until 1978 that Ernest Charles Nelson published the species in his comprehensive taxonomic revision of the genus. Nelson based the species on a type specimen collected by himself from a sand ridge on the western edge of Lake King in 1973, giving it the specific epithet glabrescens, from the botanical term "glabrescent", meaning "losing hairs"; this is a reference to the leaf indumentum, which, unlike that of A. dobsonii, does not persist. [1]

Nelson followed George Bentham in dividing Adenanthos into two sections, placing A. glabrescens into A. sect. Adenanthos because its perianth tube is fairly straight, and not swollen above the middle. He further divided the section into two subsections, with A. glabrescens placed into A. subsect. Adenanthos for reasons including the length of its perianth. [1] However Nelson discarded his own subsections in his 1995 treatment of Adenanthos for the Flora of Australia series of monographs. [2]

Two subspecies were recognised:

The placement and circumscription of A. glabrescens in Nelson's arrangement of Adenanthos may be summarised as follows: [2]

Adenanthos
A. sect. Eurylaema (4 species)
A. sect. Adenanthos
A. drummondii
A. dobagii
A. apiculatus
A. linearis
A. pungens (2 subspecies)
A. gracilipes
A. venosus
A. dobsonii
A. glabrescens
A. glabrescens subsp. glabrescens
A. glabrescens subsp. exasperatus
A. ellipticus
A. cuneatus
A. stictus
A. ileticos
A. forrestii
A. eyrei
A. cacomorphus
A. flavidiflorus
A. argyreus
A. macropodianus
A. terminalis
A. sericeus (2 subspecies)
A. × cunninghamii
A. oreophilus
A. cygnorum (2 subspecies)
A. meisneri
A. velutinus
A. filifolius
A. labillardierei
A. acanthophyllus

The species is most closely related to A. dobsonii. [1]

Distribution and habitat

Adenanthos glabrescens occurs only around Ravensthorpe in southwest Western Australia. It is known from populations are and south of Lake King, in the Fitzgerald River area, and east of Ravensthorpe. It grows in deep sand and gravelly sand, amongst scrub. [1]

Cultivation

The species is in cultivation at the Australian National Botanic Gardens, but is otherwise little known to gardeners. It probably has little potential as a garden plant, though may be of use in rockery gardens. [3]

Related Research Articles

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Adenanthos terminalis, commonly known as gland flower, yellow gland flower or adenanthos, is a one metre tall shrub in the family Proteaceae. It is found in south eastern regions of Australia, in the states of South Australia and Victoria, and is the most widespread of the two Adenanthos species occurring outside of Western Australia.

Nelsons taxonomic arrangement of <i>Adenanthos</i> First modern arrangement of the plant genus

Ernest Charles Nelson's taxonomic arrangement of Adenanthos was the first modern-day arrangement of that plant genus. First published in his 1978 Brunonia article "A taxonomic revision of the genus Adenanthos (Proteaceae)", it superseded the arrangement of George Bentham, which had stood for over a hundred years. It was updated by Nelson in his 1995 treatment for the Flora of Australia series of monographs.

<i>Adenanthos cuneatus</i> Shrub of the family Proteaceae native to the south coast of Western Australia.

Adenanthos cuneatus, also known as coastal jugflower, flame bush, bridle bush and sweat bush, is a shrub of the family Proteaceae, native to the south coast of Western Australia. The French naturalist Jacques Labillardière originally described it in 1805. Within the genus Adenanthos, it lies in the section Adenanthos and is most closely related to A. stictus. A. cuneatus has hybridized with four other species of Adenanthos. Growing to 2 m high and wide, it is erect to prostrate in habit, with wedge-shaped lobed leaves covered in fine silvery hair. The single red flowers are insignificant, and appear all year, though especially in late spring. The reddish new growth occurs over the summer.

<i>Adenanthos macropodianus</i> Species of shrub in the family Proteaceae endemic to Kangaroo Island in South Australia

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<i>Adenanthos detmoldii</i> Species of shrub in the family Proteaceae endemic to the south-west of Western Australia.

Adenanthos detmoldii, commonly known as Scott River jugflower or yellow jugflower, is a species of shrub in the family Proteaceae. It is endemic to the south-west of Western Australia.

Adenanthos ileticos is a species of shrub in the family Proteaceae. It has roughly triangular, lobed leaves, and pale pink-red and cream, inconspicuous flowers. A rare species, it is known only from a single location in the south-west of Western Australia. It was discovered in 1968, and immediately brought into cultivation, but it would not be formally published and named until a decade later.

<i>Adenanthos barbiger</i> Species of shrub in the family Proteaceae endemic to the south-west of Western Australia

Adenanthos barbiger, the hairy jugflower or hairy glandflower, is a species of shrub in the family Proteaceae. It is endemic to the south-west of Western Australia. It usually grows to 1 metre high, and has bright red flowers that appear mostly between August and December. The species was first formally described in 1839 by English botanist John Lindley in A sketch of the vegetation of the Swan River colony.

Adenanthos dobagii, commonly known as Fitzgerald woollybush, is a shrub in the family Proteaceae. It grows to a mere 50 cm high, with crowded small silvery leaves and insignificant pink or cream flowers. It occurs only in southwestern Australia, where it is found in Fitzgerald River National Park on the south coast.

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<i>Adenanthos <span style="font-style:normal;">sect.</span> Adenanthos</i> Taxonomic section of plants in the genus Proteaceae

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Adenanthos labillardierei is a species of erect shrub endemic to the slopes of the Barren Ranges in the Fitzgerald River National Park in southwest Western Australia.

<i>Adenanthos oreophilus</i> Species of shrub endemic to southwest Western Australia

Adenanthos oreophilus, commonly known as woollybush, is a species of tall shrub endemic to southwest Western Australia. It is closely related to the better known A. sericeus, and was only classified as a species distinct from the latter in 1978 by Irish botanist E. Charles Nelson.

<i>Adenanthos sericeus <span style="font-style:normal;">subsp.</span> sericeus</i> Subspecies of flowering plant

Adenanthos sericeus subsp. sericeus, commonly known as coastal woollybush, is a shrub native to the south coast of Western Australia. It has bright red but small and obscure flowers, and very soft, deeply divided, hairy leaves. It is the western subspecies of Adenanthos sericeus, occurring mostly in the vicinity of King George Sound.

References

  1. 1 2 3 4 5 6 7 8 Nelson, Ernest Charles (1978). "A taxonomic revision of the genus Adenanthos Proteaceae". Brunonia. 1: 303–406. doi:10.1071/BRU9780303.
  2. 1 2 3 Nelson, Ernest Charles (1995). "Adenanthos". In McCarthy, Patrick (ed.). Flora of Australia . Vol. 16. Collingwood, Victoria: CSIRO Publishing / Australian Biological Resources Study. pp. 314–342. ISBN   0-643-05692-0.
  3. Wrigley, John; Fagg, Murray (1991). Banksias, Waratahs and Grevilleas. Sydney: Angus & Robertson. p. 68. ISBN   0-207-17277-3.