Banksia ashbyi subsp. boreoscaia

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Banksia ashbyi subsp. boreoscaia
Ashbyigdn.JPG
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Banksia
Species:
Subspecies:
B. a. subsp. boreoscaia
Trinomial name
Banksia ashbyi subsp. boreoscaia

Banksia ashbyi subsp. boreoscaia is a shrubby, fire-tolerant subspecies of Banksia ashbyi . It is the lignotuberous form of the species, and occurs along the north-west coast of Western Australia, between Carnarvon and North West Cape.

Contents

Description

This subspecies is the shrubby, fire-tolerant form of B. ashbyi. It grows as a sprawling shrub up to about 2 m (6 ft 7 in) metres high, with a lignotuber. This is in contrast to the autonymic subspecies, B. ashbyi subsp. ashbyi, which lacks a lignotuber, and grows as a tree up to seven metres in height. In addition, the leaves of B. ashbyi subsp. boreoscaia are consistently grey-green in colour, whereas those of B. ashbyi subsp. ashbyi are usually deep green. [2] [3]

Taxonomy

Banksia ashbyi was first formally described in 1934 by Edmund Gilbert Baker in the Journal of Botany, British and Foreign . The specific epithet honours Edwin Ashby, one of the collectors of the type specimens. [4] Subspecies boreoscaia was first formally described in 2008 by Alex George. [5] Although distinct lignotuberous and non-lignotuberous forms of B. ashbyi had long been recognised, they were not formally described as taxa until George published the lignotuberous form as B. ashbyi subsp. boreoscaia, thus invoking the autonym B. ashbyi subsp. ashbyi for the non-lignotuberous form. George noted that although it is not possible to distinguish between the subspecies from the flowers, fruit or foliage, the distinctive differences in habit are retained in cultivation. For the type specimen of B. ashbyi subsp. boreoscaia, George chose a specimen collected from Quobba Point by Kevin Francis Kenneally on 15 October 1975. The specific epithet boreoscaia is from the Greek borealis ("northern") and skaios ("west"), and refers to the fact that this is the only Banksia taxon to occur in the north-west of Western Australia. [2]

Distribution and habitat

Banksia ashbyi subsp. boreoscaia grows on coastal dunes amongst low shrubland, from Quobba, just north of Carnarvon, north to North West Cape. [2]

Related Research Articles

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<i>Banksia bipinnatifida</i> Species of shrub in the family Proteaceae endemic to Western Australia

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<i>Banksia rufa</i> Species of prostrate shrub

Banksia rufa is a species of prostrate shrub that is endemic to the south-west of Western Australia. It has broadly linear, pinnatifid or pinnatipartite leaves with between five and twenty lobes on each side, yellow, orange or brownish flowers in heads of forty or more, and glabrous, egg-shaped follicles.

Banksia ionthocarpa is a species of shrub that is endemic to Western Australia. It has short, hairy, prostrate stems, pinnatifid leaves, pinkish purple to orange flower in heads of between forty and sixty at the base of leaves, and egg-shaped follicles with a distinctive tuft of hairs on the end.

<i>Banksia prolata</i> Species of shrub in the family Proteaceae endemic to Western Australia

Banksia prolata is a species of bushy shrub that is endemic to Western Australia. It has linear, serrated or pinnatifid leaves, yellow flowers in heads of between 150 and 250, and egg-shaped follicles.

<i>Banksia nobilis</i> Species of shrub in Western Australia

Banksia nobilis, commonly known as the golden dryandra, great dryandra or kerosene bush, is a shrub of the family Proteaceae which is endemic to Western Australia. It occurs on lateritic rises from Eneabba to Katanning in the state's Southwest Botanic Province. With large pinnatifid leaves with triangular lobes, and a golden or reddish pink inflorescence, it is a popular garden plant. It was known as Dryandra nobilis until 2007, when all Dryandra species were transferred to Banksia by Austin Mast and Kevin Thiele. There are two subspecies, B. nobilis subsp. nobilis and B. nobilis subsp. fragrans.

Banksia pallida is a species of column-shaped shrub that is endemic to the south-west of Western Australia. It has densely hairy stems, linear leaves with three to five serrations on each side, pale yellow flowers in heads of up to eighty and egg-shaped to elliptical follicles.

Banksia plumosa is a species of shrub that is endemic to Western Australia. It has hairy stems, broadly linear pinnatifid to pinnatipartite leaves with triangular lobes, creamy-yellow flowers in heads of up to eighty, and egg-shaped follicles.

Banksia prionophylla is a shrub endemic to Western Australia. Known only from a single population of around 70 plants in a remote part of Western Australia, it is considered rare but not endangered. It was first discovered in 2001, and published under the genus Dryandra in 2005, before being transferred into Banksia in 2007.

<i>Banksia pteridifolia</i> Species of shrub in the family Proteaceae native to Western Australia

Banksia pteridifolia, commonly known as tangled honeypot, is a species of shrub that is endemic to the southwest of Western Australia. It has short, underground stems, deeply pinnatipartite leaves with sharply-pointed, linear lobes on the sides, creamy white or yellow flowers in heads of about one hundred and later up to five follicles in each head.

<i>Banksia serratuloides</i> Species of shrub in the family Proteaceae endemic to Western Australia

Banksia serratuloides is a species of small shrub that is endemic to Western Australia. It has linear, pinnatipartite leaves, yellow and pink flowers in heads of about forty and hairy, wrinkled follicles.

<i>Banksia squarrosa</i> Species of shrub in the genus Banksia native to Western Australia

Banksia squarrosa, commonly known as pingle, is a species of prickly shrub that is endemic to Western Australia. It has linear to narrow lance-shaped leaves with up to ten sharply-pointed teeth on each side, yellow flowers in heads of about sixty and later, up to seven oblong to egg-shaped follicles in each head.

<i>Banksia ashbyi <span style="font-style:normal;">subsp.</span> ashbyi</i> Subspecies of tree in the genus Banksia

Banksia ashbyi subsp. ashbyi is a recently recognised subspecies of Banksia ashbyi. It is the non-lignotuberous arborescent form of the species, which occurs between Geraldton and Shark Bay, and in the Kennedy Ranges.

Calothamnus quadrifidus subsp. obtusus is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is similar to other subspecies of Calothamnus quadrifidus except that its leaves are linear and somewhat rough and scaly and the stamen bundles are relatively short.

References

  1. "Banksia aurantia subsp. boreoscaia". Australian Plant Census. Retrieved 1 April 2020.
  2. 1 2 3 George, Alex S. (2008). "Further new taxa in Banksia (Proteaceae: Grevilleoideae)" (PDF). Nuytsia. 18: 54. Retrieved 1 April 2020.
  3. "Banksia ashbyi subsp. boreoscaia A.S.George". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions. OOjs UI icon edit-ltr-progressive.svg
  4. "Banksia ashbyi". APNI. Retrieved 1 April 2020.
  5. "Banksia ashbyi subsp. boreoscaia". APNI. Retrieved 1 April 2020.