Banksia penicillata

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Banksia penicillata
Bc penicillata1 maranoa.jpg
Banksia penicillata in Maranoa Gardens
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Banksia
Species:
B. penicillata
Binomial name
Banksia penicillata
Synonyms [1]
  • Banksia conferta subsp. penicillata(A.S.George) A.S.George
  • Banksia conferta var. penicillataA.S.George
Foliage Banksia penicillata 02.jpg
Foliage

Banksia penicillata is a species of shrub that is endemic to a restricted area of New South Wales. It has smooth bark, serrated, elliptic to egg-shaped leaves, green to bluish flower buds, later yellow flowers in a cylindrical spike, and later still, up to one hundred narrow elliptical follicles in each spike, surrounded by the remains of the flowers.

Contents

Description

Banksia penicillata is a shrub that typically grows to a height of 4 m (13 ft) and has smooth bark but does not form a lignotuber. The leaves are arranged in whorls and are 35–120 mm (1.4–4.7 in) long and 7–40 mm (0.28–1.57 in) wide on a petiole 5–19 mm (0.20–0.75 in) long. The sides of the leaves are serrated or lobed and the lower surface is covered with woolly white hairs. The flower buds are green to bluish and are followed by yellow flowers in a cylindrical spike 70–190 mm (2.8–7.5 in) long with woolly-hairy involucral bracts 10–20 mm (0.39–0.79 in) long at the base of the spike. The perianth is 20–26 mm (0.79–1.02 in) long and the pistil 22–26 mm (0.87–1.02 in) long and slightly curved. Flowering occurs from March to June and up to one hundred elliptical follicles 11–15 mm (0.43–0.59 in) long and surrounded by the remains of the flowers, develop in each spike. [2] [3] [4]

Taxonomy and naming

Banksia conferta was first formally described in 1981 by Alex George in the journal Nuytsia . In the same publication he described two varieties, conferta and penicillata. [5] [6] In 1996, George raised the variety penicillata to subspecies - B. conferta subsp. penicillata, at the same time creating the autonym B. conferta subsp. conferta. [7] [8] In the same year (1996), Kevin Thiele and Pauline Ladiges raised subspecies penicillata to species status as B. penicillata in Australian Systematic Botany , based on the differences in habit, bark, leaf shape, indumentum and flower colour, and the fact that the two taxa were so far from each other. According to their morphological cladistic analysis, B. penicillata was sister taxon to B. paludosa. [9] In the same paper, the authors noted that the adult leaves of B. penicillata and B. paludosa have toothed margins, but B. conferta has entire margins. The change is accepted by the Australian Plant Census. [1] [10] The specific epithet (penicillata) is from the Latin word penicillatus, meaning "like an artist's camel-hair brush. [11] [12] A 2013 molecular study by Marcel Cardillo and colleagues using chloroplast DNA and combining it with earlier results placed B. penicillata as a part of a lineage that gave rise to the three subspecies of B. integrifolia. [13]

Distribution and habitat

In bud, Newnes Plateau Bpenicillata bud newnesplat.jpg
In bud, Newnes Plateau

Banksia penicillata grows on and near rocky sandstone cliffs in forest and woodland in a few locations in the Blue Mountains west of Sydney. [3]

Ecology

This banksia does not have a lignotuber but the follicles remain closed until burnt in a bushfire. The plant is killed by fire but regenerates from seed. [2] [11] Fieldwork in 2021 established that intervals of under 12 years between bushfires severely compromised the ability of the species to reproduce afterwards, with little or no seedling recruitment observed. Researchers Ian Baird and Doug Benson recommended if possible, a minimum of 15 years between fires (and leaving some for 30 years unburnt) would give populations the best likelihood of survival. [14]

Related Research Articles

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

Banksia ashbyi, commonly known as Ashby's banksia, is a species of shrub or small tree that is endemic to Western Australia. It has smooth, grey bark, deeply serrated, hairy leaves and spikes of bright orange flowers.

<i>Banksia conferta</i> Species of shrub in the family Proteaceae endemic to eastern Australia

Banksia conferta, commonly known as the glasshouse banksia, is a species of shrub that is endemic to eastern Australia. It has rough, bark on the trunk, elliptic to egg-shaped leaves arranged in whorls, crowded yellow flowers in a cylindrical spike later forming a relatively large number of follicles.

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

Banksia meisneri, commonly known as Meisner's banksia, is a shrub that is endemic to a small area in the south-west of Western Australia. It has crowded, more or less linear leaves and in winter and spring, spikes of golden brown flowers followed by furry fruit which usually only open after fire.

<i>Banksia paludosa</i> Shrub in the family Proteaceae native to New South Wales, Australia

Banksia paludosa, commonly known as the marsh or swamp banksia, is a species of shrub in the plant genus Banksia. It is native to New South Wales, Australia, where it is found between Sydney and Batemans Bay, with an isolated population further south around Eden. There are two recognised subspecies, the nominate of which is a spreading shrub to 1.5 m (4.9 ft) in height, and subsp. astrolux is a taller shrub to 5 m (16 ft) high found only in Nattai National Park.

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

Banksia pilostylis is a species of shrub that is endemic to the south-west of Western Australia. It has hard, fissured bark, narrow wedge-shaped, serrated leaves, pale yellow flowers in cylindrical spikes and elliptical follicles that open when heated in a bushfire.

<i>Banksia saxicola</i> Species of shrub in the family Proteaceae native to Victoria (Australia)

Banksia saxicola, the rock banksia or Grampians banksia, is a species of tree or shrub in the plant genus Banksia. It occurs in Victoria in two distinct populations, one in The Grampians and the other on Wilsons Promontory. Formerly considered to be a form of B. integrifolia, it was described as a distinct species by Alex George in 1981. It is most closely related to Banksia marginata.

<i>Banksia seminuda</i> Species of tree in the family Proteaceae found in south west Western Australia

Banksia seminuda, commonly known as the river banksia, is a tree in the plant genus Banksia. It is found in south west Western Australia from Dwellingup (32°42′ S) to the Broke Inlet east of Denmark (34°57′ S). It is often mistaken for, and was originally considered a subspecies of, the Banksia littoralis. Stephen Hopper described the subspecies remanens as a short-leaved shrubby form found in the coastal sands below granite outcrops in the Walpole-Nornalup National Park, however George does not feel this form warrants taxonomic recognition as it lies within the normal variability of the species and there was no clear distinction between it and the other populations of B. seminuda.

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

Banksia micrantha is a species of small shrub that is endemic to the south-west of Western Australia. It is a spreading bush with sharply-pointed linear leaves, pale yellow flower spikes and up to twenty-five follicles surrounded by the remains of the flowers. It was first formally described by Alex George in 1981.

<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 integrifolia <span style="font-style:normal;">subsp.</span> monticola</i> Subspecies of tree in the family Proteaceae from the Blue Mountains and northern New South Wales

Banksia integrifolia subsp. monticola, commonly known as White Mountain banksia, is a subspecies of Banksia integrifolia. Described in 1994, it occurs in the Blue Mountains and in northern New South Wales. It contains the largest recorded Banksia trees.

The genus <i>Banksia</i> L.f. (Proteaceae) 1981 taxonomic monograph by Alex George

"The genus Banksia L.f. (Proteaceae)" is a 1981 monograph by Alex George on the taxonomy of the plant genus Banksia. Published by the Western Australian Herbarium as Nuytsia3(3), it presented George's taxonomic arrangement of Banksia, the first major taxonomic revision of the genus since George Bentham published his arrangement in Flora Australiensis in 1870.

Banksia densa is a species of column-like shrub that is endemic to Western Australia. It has deeply serrated to pinnatifid leaves, creamy yellow flowers in heads of up to seventy-five, and hairy follicles.

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

Banksia drummondii, commonly known as Drummond's dryandra, is a species of shrub that is endemic to Western Australia. It has pinnatifid to pinnatisect leaves, heads of up to one hundred cream-coloured, red and yellow flowers and glabrous fruit.

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 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.

Kevin Thiele and Pauline Ladiges taxonomic arrangement of Banksia, published in 1996, was a novel taxonomic arrangement that was intended to align the taxonomy of Banksia more closely with the phylogeny that they had inferred from their cladistic analysis of the genus. It replaced Alex George's 1981 arrangement, but most aspects were not accepted by George, and it was soon replaced by a 1999 revision of George's arrangement. However some herbaria have continued to follow Thiele and Ladiges on some points.

<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 neoanglica</i> Species of shrub in the family Proteaceae from eastern Australia

Banksia neoanglica, commonly known as New England banksia is a shrub or small tree with leaves that are greenish on the upper surface, whitish with soft hairs on the lower side and spikes of flowers with styles that turn black as they open. It is similar to Banksia spinulosa and was formerly known as Banksia spinulosa var. neoanglica, but differs in that its leaves are wider and have margins that are not tightly turned under. It is found mainly along the eastern edge of the Great Dividing Range.

References

  1. 1 2 3 "Banksia penicillata". Australian Plant Census. Retrieved 22 May 2020.
  2. 1 2 George, Alex S. (1999). Flora of Australia (PDF). Vol. 17B. Canberra: Australian Biological Resources Study, Canberra. pp. 191–192. Retrieved 22 May 2020.
  3. 1 2 Harden, Gwen J. "Banksia conferta". Royal Botanic Garden Sydney. Retrieved 22 May 2020.
  4. George, Alex S. (1996). The Banksia Book (3rd ed.). Kenthurst, New South Wales: Kangaroo Press. p. 56. ISBN   0-86417-818-2.
  5. George, Alex S. (1981). "The Genus Banksia L.f. (Proteaceae)". Nuytsia. 3 (3): 284–291. doi:10.58828/nuy00060. S2CID   196677407 . Retrieved 22 May 2020.
  6. "Banksia conferta var. penicillata". APNI. Retrieved 22 May 2020.
  7. "Banksia conferta subsp. penicillata". APNI. Retrieved 22 May 2020.
  8. George, Alex S. (1996). "Notes on Banksia L.f. (Proteaceae). Nuytsia". Nuytsia. 11 (1): 22. doi:10.58828/nuy00249. S2CID   181990314 . Retrieved 22 May 2020.
  9. Thiele, Kevin; Ladiges, Pauline Y. (1996). "A Cladistic Analysis of Banksia (Proteaceae)". Australian Systematic Botany . 9 (5): 661–733 [714]. doi:10.1071/SB9960661.
  10. "Banksia penicillata". APNI. Retrieved 22 May 2020.
  11. 1 2 "Banksia penicillata". Australian Native Plants Society (Australia). Retrieved 22 May 2020.
  12. William T. Stearn (1992). Botanical Latin. History, grammar, syntax, terminology and vocabulary (4th ed.). Portland, Oregon: Timber Press. p. 463.
  13. Cardillo, Marcel; Pratt, Renae (2013). "Evolution of a Hotspot Genus: Geographic Variation in Speciation and Extinction Rates in Banksia (Proteaceae)". BMC Evolutionary Biology. 13 (155): 155. Bibcode:2013BMCEE..13..155C. doi: 10.1186/1471-2148-13-155 . PMC   3751403 . PMID   23957450.
  14. Baird, Ian R.C.; Benson, Doug (2021). "Population Ecology of Two Endemic, Fire-sensitive, Blue Mountains Banksia Taxa (Proteaceae) in Response to Fire". Proceedings of the Linnean Society of New South Wales. 143: 87–108.