Banksia praemorsa

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Cut-leaf banksia
Banksia praemorsa flower.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Banksia
Subgenus: Banksia subg. Banksia
Section: Banksia sect. Banksia
Series: Banksia ser. Cyrtostylis
Species:
B. praemorsa
Binomial name
Banksia praemorsa
Synonyms

Banksia marcescens R.Br.
Sirmuellera praemorsa (Andrews) Kuntze

Contents

Banksia praemorsa, commonly known as the cut-leaf banksia, is a species of shrub or tree in the plant genus Banksia . It occurs in a few isolated populations on the south coast of Western Australia between Albany and Cape Riche.

Description

Banksia praemorsa grows as a shrub to 4 m (13 ft 1 in) with a relatively thick sturdy trunk that branches quite close to the ground. [2] Occasionally specimens can be up to 6–7 m (19 ft 8 in – 23 ft 0 in) with a trunk diameter of 30–40 cm (12–16 in). [3] The bark is rough and flaky. Flowering occurs from August to November; the flower spikes arise from the ends of small lateral branches and thus, despite being terminal, are obscured by foliage. Up to 27 cm (11 in) high, they are composed of hundreds of individual flowers growing out of a vertical woody spike. [2]

Taxonomy

Leaves. Left: upper surface. Right: lower surface. Banksia praemorsa leaves.jpg
Leaves. Left: upper surface. Right: lower surface.

English plantsman and botanical artist Henry Cranke Andrews described this species from a cultivated specimen in the conservatory of the Clapham Collection in July 1802. [4] A specimen that flowered at Kew Gardens the same year was selected as the neotype by Alex George in his 1981 monograph on the genus. These plants had been raised from seed collected by Archibald Menzies at King George Sound in September–October 1791. [2] The species name is derived from the Latin adjective praemorsus "bitten off", referring to the shape of the ends of the leaves. [5]

George Bentham published a thorough revision of Banksia in his landmark publication Flora Australiensis in 1870. In Bentham's arrangement, the number of recognised Banksia species was reduced from 60 to 46. Bentham defined four sections based on leaf, style and pollen-presenter characters. He used Brown's name B. marcescens, placing it in section Orthostylis. [6]

In 1891, German botanist Otto Kuntze challenged the generic name Banksia L.f., on the grounds that the name Banksia had previously been published in 1775 as Banksia J.R.Forst & G.Forst, referring to the genus now known as Pimelea . Kuntze proposed Sirmuellera as an alternative, republishing B. praemorsa as Sirmuellera praemorsa. [7] The challenge failed, and Banksia L.f. was formally conserved. [2]

Infrageneric placement

George placed B. praemorsa in B. subg. Banksia, because its inflorescences are typical Banksia flower spikes; B. sect. Banksia because of its straight styles; and B. ser. Cyrtostylis because it has slender flowers. [2] He considered its closest relatives to be B. media and, after its discovery, B. epica. [8]

In 1996, Kevin Thiele and Pauline Ladiges published the results of a cladistic analysis of morphological characters of Banksia. They retained George's subgenera and many of his series, but discarded his sections. George's B. ser. Cyrtostylis was found to be "widely polyphyletic", as six of the fourteen taxa in that series occurred singly in locations throughout Thiele and Ladiges' cladogram. The remaining eight formed a clade that further resolved into two subclades, with B. praemorsa appeared in one of them, alongside media, epica and pilostylis: [9]

Since 1998, Austin Mast has been publishing results of ongoing cladistic analyses of DNA sequence data for the subtribe Banksiinae. His analyses suggest a phylogeny that is rather different from previous taxonomic arrangements. With respect to B. praemorsa, however, Mast's results accord closely with the arrangement of Thiele and Ladiges, placing it in a polytomous clade corresponding exactly with Thiele and Ladiges' B. ser. Cyrtostylis. [10] [11] [12]

Early in 2007 Mast and Thiele initiated a rearrangement by transferring Dryandra to Banksia, and publishing B. subg. Spathulatae for the species having spoon-shaped cotyledons; in this way they also redefined the autonym B. subg. Banksia. They foreshadowed publishing a full arrangement once DNA sampling of Dryandra was complete; in the meantime, if Mast and Thiele's nomenclatural changes are taken as an interim arrangement, then B. praemorsa is placed in B. subg. Banksia. [13]

Distribution and habitat

All-yellow flowered form Banksia praemorsa 01 gnangarra.jpg
All-yellow flowered form

Banksia praemorsa is found in scattered colonies along the south coast of Western Australia between Torbay (near Albany) and Cape Riche, where it occurs on the sea-facing side of sand dunes or sand cliffs or hills over limestone; all populations occur within 2 km (1.2 mi) of the coast. [3] The annual rainfall is 800 mm (31.5 in). [5]

Cultivation

Banksia praemorsa adapts readily to cultivation, though does not tolerate summer humidity well. It takes 4–5 years to flower from seed. The all-yellow flowered form is often cultivated, and has reached 9 m (30 ft) high at the Banksia Farm in Mount Barker, WA. It tolerates soil pH of 5.5 to 7.5, and requires good drainage and a sunny aspect. [5] Seeds do not require any treatment, and take 30 to 49 days to germinate. [14]

Related Research Articles

<i>Banksia <span style="font-style:normal;">subg.</span> Banksia</i> Subgenus in the family Proteaceae

Banksia subg. Banksia is a valid botanic name for a subgenus of Banksia. As an autonym, it necessarily contains the type species of Banksia, B. serrata. Within this constraint, however, there have been various circumscriptions.

<i>Banksia sceptrum</i> Flowering shrub in the family Proteaceae from Western Australia

Banksia sceptrum, commonly known as the sceptre banksia, is a plant that grows in Western Australia near the central west coast from Geraldton north through Kalbarri to Hamelin Pool. It extends inland almost to Mullewa. First collected and grown by early settler James Drummond in Western Australia, it was described by Swiss botanist Carl Meissner in 1855.

Taxonomy of <i>Banksia</i> Classification of the plant genus Banksia

As with other flowering plants, the taxonomy of Banksia has traditionally been based on anatomical and morphological properties of the Banksia flower, fruiting structure and seed, along with secondary characteristics such as leaf structure and growth habit. Increasingly, molecular evidence from DNA is providing important new insights into relationships within the genus and between this and other genera in the Proteaceae.

<i>Banksia caleyi</i> Australian species of shrub, the red lantern banksia

Banksia caleyi, commonly known as Caley's banksia or red lantern banksia, is a species of woody shrub of the family Proteaceae native to Western Australia. It generally grows as a dense shrub up to 2 m (7 ft) tall, has serrated leaves and red, pendent (hanging) inflorescences which are generally hidden in the foliage. First described by Scottish naturalist Robert Brown in 1830, Banksia caleyi was named in honour of the English botanist George Caley. No subspecies are recognised. It is one of three or four related species with hanging inflorescences, which is an unusual feature within the genus.

<i>Banksia lemanniana</i> Shrub of the family Proteaceae native to Western Australia

Banksia lemanniana, the yellow lantern banksia or Lemann's banksia, is a species of flowering plant in the family Proteaceae, native to Western Australia. It generally grows as an open woody shrub or small tree to 5 m (16 ft) high, with stiff serrated leaves and unusual hanging inflorescences. Flowering occurs over summer, the greenish buds developing into oval flower spikes before turning grey and developing the characteristic large woody follicles. It occurs within and just east of the Fitzgerald River National Park on the southern coast of the state. B. lemanniana is killed by bushfire and regenerates from seed.

<i>Banksia lindleyana</i> Species of shrub in the family Proteaceae from Western Australia

Banksia lindleyana, commonly known as the porcupine banksia, is a species of woody shrub in the genus Banksia of the family Proteaceae. It generally grows as a small shrub to 1 m (3 ft) high with long narrow serrated leaves, and bright yellow oval or round inflorescences. Flowering occurs in late summer, after which time the flower spikes age and turn to brown and then grey, and develop up to 70 follicles. It occurs in the vicinity of Kalbarri, Western Australia. Found on sandy soils, the plant serves as a pollinator for a variety of bird and animal species.

<i>Banksia media</i> Shrub native to Western Australia

Banksia media, the southern plains banksia or golden stalk banksia, is a species of flowering plant in the family Proteaceae. An evergreen shrub, it occurs on the south coast of Western Australia between Albany and Israelite Bay, where it is a common plant. A many-branched bush with wedge-shaped serrated leaves and large golden-yellow flower spikes, known as inflorescences, it grows up to 10 metres (30 ft) high.

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

Banksia nutans, commonly known as nodding banksia, is a species of shrub native to the south coast of Western Australia in the genus Banksia. Growing to a metre (3 ft) tall, it has pale blue-green fine-leaved foliage and unusual purple-brown inflorescences which hang upside down rather than grow upright like most other banksias.

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

Banksia victoriae, commonly known as Woolly Orange Banksia, is a species of large shrub or small tree in the plant genus Banksia. It occurs in Western Australia between Northampton, Western Australia and Kalbarri, with the occasional plant further north as far as Zuytdorp Nature Reserve.

<i>Banksia <span style="font-style:normal;">ser.</span> Dryandroideae</i> Series of Banksia

Banksia ser. Dryandroideae is a taxonomic series in the plant genus Banksia. First published by Carl Meissner in 1856, the name has had two circumscriptions. As presently circumscribed it is monotypic, containing only B. dryandroides.

<i>Banksia <span style="font-style:normal;">ser.</span> Abietinae</i> Series in the genus Banksia

Banksia ser. Abietinae is a valid botanic name for a series of Banksia. First published by Carl Meissner in 1856, the name has had three circumscriptions.

<i>Banksia <span style="font-style:normal;">ser.</span> Salicinae</i> Taxonomic series in the family Proteaceae

Banksia ser. Salicinae is a valid botanic name for a series of Banksia. First published by Carl Meissner in 1856, the name has had three circumscriptions.

Taxonomy of <i>Banksia integrifolia</i> Classification of a tree species

The taxonomy of Banksia integrifolia has a long and complex history, the result of confusion caused by the species' great variability, and similarities with some closely related species. The existence of hybrids between B. integrifolia and related species as well as early attempts to classify the species based on dried specimen material have also contributed to the confusion.

<i>Banksia <span style="font-style:normal;">ser.</span> Quercinae</i> Taxonomic series in the family Proteaceae

Banksia ser. Quercinae is a valid botanic name for a series of Banksia. First published by Carl Meissner in 1856, the name has had three circumscriptions.

<i>Banksia <span style="font-style:normal;">ser.</span> Cyrtostylis</i> Taxonomic series in the genus Banksia

Banksia ser. Cyrtostylis is a taxonomic series within the plant genus Banksia. First published at sectional rank by George Bentham in 1870, it was demoted to a series by Alex George in 1981. The name has had three circumscriptions.

<i>Banksia <span style="font-style:normal;">ser.</span> Banksia</i> Autonymous series in the genus Banksia

Banksia ser. Banksia is a valid botanic name for a series of Banksia. As an autonym, it necessarily contains the type species of Banksia, B. serrata. Within this constraint, however, there have been various circumscriptions.

<span class="mw-page-title-main">George's taxonomic arrangement of Banksia</span> 1981 and 1996 arrangements of the Australian endemic plant genus Banksia

Alex George's taxonomic arrangement of Banksia was the first modern-day arrangement for that genus. First published in 1981 in the classic monograph The genus Banksia L.f. (Proteaceae), it superseded the arrangement of George Bentham, which had stood for over a hundred years. It was overturned in 1996 by Kevin Thiele and Pauline Ladiges, but restored by George in 1999. A recent publication by Austin Mast and Kevin Thiele suggests that it will soon be overturned again.

<i>Banksia spinulosa <span style="font-style:normal;">var.</span> collina</i> Variety of shrub in the family Proteaceae from the east coast of Australia

Banksia spinulosa var. collina is a shrub that grows along the east coast of Australia, in Queensland and New South Wales. Commonly known as Hill Banksia or Golden Candlesticks, it is a taxonomic variety of B. spinulosa. It is a popular garden plant widely sold in nurseries.

<i>Banksia <span style="font-style:normal;">subser.</span> Longistyles</i> Subseries in the family Proteaceae

Banksia subser. Longistyles is a valid botanic name for a subseries of Banksia. It was published by Kevin Thiele in 1996, but discarded by Alex George in 1999.

<i>Banksia <span style="font-style:normal;">ser.</span> Ochraceae</i> Taxonomic series in the family Proteaceae

Banksia ser. Ochraceae is a valid botanic name for a taxonomic series within the plant genus Banksia. It was published by Kevin Thiele in 1996, but discarded by Alex George in 1999.

References

  1. Barrett, S.; Atkins, K.; Keith, D. (2020). "Banksia praemorsa". IUCN Red List of Threatened Species . 2020: e.T112529205A113306731. doi: 10.2305/IUCN.UK.2020-2.RLTS.T112529205A113306731.en . Retrieved 15 October 2022.
  2. 1 2 3 4 5 George, Alex S. (1981). "The Genus Banksia L.f. (Proteaceae)". Nuytsia . 3 (3): 239–473 [347–48]. ISSN   0085-4417.
  3. 1 2 Taylor, Anne; Hopper, Stephen (1988). The Banksia Atlas . Vol. (Australian Flora and Fauna Series Number 8). Canberra, Australian Capital Territory: Australian Government Publishing Service. pp. 192–93. ISBN   0-644-07124-9.
  4. "Banksia praemorsa Andrews". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
  5. 1 2 3 Collins, Kevin; Collins, Kathy; George, Alex S. (2008). Banksias. Melbourne, Victoria: Bloomings Books. pp. 301–02. ISBN   1-876473-68-1.
  6. Bentham, George (1870). "Banksia"  . Flora Australiensis: Volume 5: Myoporineae to Proteaceae. London, United Kingdom: L. Reeve & Co. pp. 541–62.
  7. Kuntze, Otto (1891). Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum. Leipzig, Germany: A. Felix. p. 582.
  8. George, Alex (1999). "Banksia". In Wilson, Annette (ed.). Flora of Australia: Volume 17B: Proteaceae 3: Hakea to Dryandra. CSIRO Publishing / Australian Biological Resources Study. pp. 175–251. ISBN   0-643-06454-0.
  9. Thiele, Kevin; Ladiges, Pauline Y. (1996). "A cladistic analysis of Banksia (Proteaceae)". Australian Systematic Botany . 9 (5): 661–733. doi:10.1071/SB9960661.
  10. Mast, Austin R. (1998). "Molecular systematics of subtribe Banksiinae (Banksia and Dryandra; Proteaceae) based on cpDNA and nrDNA sequence data: implications for taxonomy and biogeography". Australian Systematic Botany. 11 (4): 321–342. doi:10.1071/SB97026.
  11. Mast, Austin R.; Givnish, Thomas J. (2002). "Historical biogeography and the origin of stomatal distributions in Banksia and Dryandra (Proteaceae) based on Their cpDNA phylogeny". American Journal of Botany . 89 (8): 1311–1323. doi: 10.3732/ajb.89.8.1311 . PMID   21665734.
  12. Mast, Austin R.; Jones, Eric H. & Havery, Shawn P. (2005). "An assessment of old and new DNA sequence evidence for the paraphyly of Banksia with respect to Dryandra (Proteaceae)". Australian Systematic Botany. 18 (1): 75–88. doi:10.1071/SB04015.
  13. Mast, Austin R. & Thiele, Kevin (2007). "The transfer of Dryandra R.Br. to Banksia L.f. (Proteaceae)". Australian Systematic Botany . 20 (1): 63–71. doi:10.1071/SB06016.
  14. Sweedman, Luke; Merritt, David (2006). Australian seeds: a guide to their collection, identification and biology. CSIRO Publishing. p. 203. ISBN   0-643-09298-6.