Bedfordia salicina

Last updated

Bedfordia salicina
Bedfordia salicina.jpg
Bright yellow inflorescence of Bedfordia salicina arising from leaf axil
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Bedfordia
Species:
B. salicina
Binomial name
Bedfordia salicina

Bedfordia salicina, commonly known as Tasmanian blanketleaf, is an endemic angiosperm of Tasmania, Australia. It is widespread throughout wet sclerophyll forests, moist gullies and intermediate forests and woodlands between wet and dry sclerophyll communities. Bedfordia salicina is abundant at low elevations, on dolerite, sandstone and mudstone substrate, east of Tylers line. Alternating leaves droop down to blanket the stem, coining the species common name, blanketleaf.

Contents

Description

Typical wet gully habitat of Bedfordia salicina Bedfordia salicina 1.png
Typical wet gully habitat of Bedfordia salicina

Bedfordia salicina is a common large shrub or small tree, 2–5 m (6 ft 7 in – 16 ft 5 in) tall and 2–3 m (6 ft 7 in – 9 ft 10 in) wide, in the family Asteraceae. [2] The central stem twists and bends in a mostly erect habit, with many lateral stems branching outwards and upward in a candelabra-like-fashion. Young wood of apical meristems are covered in silvery tomentum. Soft mesophyllic leaves have a dark green adaxial surface and a silvery abaxial covered in dense, matted, single layer of stellate hairs. [2] [3] [4] Leaves are alternate and arise from very short petioles (up to 8 mm (0.31 in)), are long (60–150 mm (2.4–5.9 in)) and moderately broad (10–18 mm (0.39–0.71 in)), oblanceolate and undulate with prominent midrib and subtending veins and slightly revolute margins. [2] [5] Inflorescence an irregular panicle of 8-25 capitula which arise from the several upper leaf axils to form dense clusters of more than five bright yellow tubular disc florets and herbaceous phyllaries. [2] [5] Flowers October through to December. [5] Fruits form an achene 3 mm (0.12 in) long through to March; old capitula remains year-round. [5]

Habitat and distribution

Bedfordia salicina is endemic to Tasmania, most common in eastern and central areas.

Found in the shrubby understorey of dry to wet sclerophyll forests and woodlands, commonly on highly fertile Jurassic Dolerite soils, [5] although can also be found on a variety of rock types, [6] from sea level to 1,000 m (3,300 ft) elevation. [2] [5]

Bedfordia salicina current extent (including all data between 1950-present). File created using Atlas of Living Australia on 16 Feb 2022. Bedfordia salicina distribution map.png
Bedfordia salicina current extent (including all data between 1950-present). File created using Atlas of Living Australia on 16 Feb 2022.
Showing the wiry candelabra stem habit of Bedfordia salicina Bedfordia salicina 2.png
Showing the wiry candelabra stem habit of Bedfordia salicina
Apical meristem showing young wood with silvery tomentum and leaf habit Bedfordia salicina 5.png
Apical meristem showing young wood with silvery tomentum and leaf habit

When found in dry sclerophyll forests, this species is often associated with Eucalyptus obliqua, Eucalyptus delegatensis, Eucalyptus globulus, Eucalyptus pulchella, Pomaderris apetala, Acacia dealbata, Acacia mucronata, Leptospermum lanigerum, Bursaria spinosa, Dodonaea viscosa, Olearia viscosa, Cyathodes glauca, Blechnum wattsii and Blechnum nudum . [5] In addition to this, Bedfordia salicina can be found in the varying density, low-diversity shrub layer among Xanthorrhoea australis in Callitris dominated woodland with Eucalyptus globulus and Eucalyptus viminalis to 10 m (33 ft) tall. These woodlands occur in fire shadow sites, on dry, rocky dolerite substrate or boulder strewn shores with sandstone talus and slope deposits in south-east Tasmania. [6] Bedfordia salicina can also be observed along the high energy coastline nearby Port Arthur, occurring alongside tussock grassland, heath and scrub on mudstone cliffs. [6]

When found in wet sclerophyll forests, the canopy is often dominated by Eucalyptus obliqua and Eucalyptus regnan , below which stands Acacia melanoxylon, Acacia dealbata, and at the height of Bedfordia, you will also find Olearia argophylla, Nematolepis squamea and/or Pomaderris apetala , [7] Pittosporum bicolor and Coprosma quadrifida . [8]

Inflorescence arise at leaf axils Bedfordia salicina 4.png
Inflorescence arise at leaf axils

Fire ecology

Bedfordiasalacina is found in sclerophyllous forests that are widely adapted to fire, [6] [9] while wetter environments have fire free periods up to 100 years, drier environments have fire free periods of 25–50 years. Bedfordia salicina has low propensity to propagate fire among wet sclerophyll and gully species and require considerable moisture loss before flaming can occur. When oven dried, Bedfordia salicina can reach 65-72% moisture loss from its initial weight, [10] at which Bedfordia can both ignite and spread fire rapidly. Following fire, Bedfordia salicina have the capacity to regenerate vegetatively via lignotubers or seed. [6]

Animal ecology

Bedfordia salicina undergoes strong macropod browsing effects, particularly when preferred species such as Exocarpus cupressiformis and Bursaria spinosa supplies are absent or exhausted. [11]

Uses

Bedfordia salicina have several natural terpenoids, of which include sesquiterpenoids, diterpenoids, and cinnamate ester compounds. [12]

Threats and conservation

Bedfordia salicina conservation status has not been evaluated.

Taxonomy

The genus Bedfordia was named in honour of horticulturalist and botanist, John Russell (1866-1839), sixth Duke of Bedford. [5] There are three species belonging to the genus:

Species name (current and old): [13] Distribution:
Bedfordia arborescens Hochr.
  • Senecio bedfordii F.Muell
Eastern mainland Australia
Bedfordia linearis (Labill.) DC.
  • Cacalia linearis Labill.
  • Culcitium lineare (Labill.) Spreng.
  • Senecio billardierei F.Muell.
Endemic to Tasmania
Bedfordia salicina (Labill.) DC.
  • Cacalia salicina Labill.
  • Culcitium salicinum (Labill.) Spreng.
Endemic to Tasmania

The two species native to Tasmania can be distinguished by leaf shape and size. Bedfordia linearis has narrow linear leaves, 20–70 mm long, Bedfordia salicina has moderately broad oblanceolate leaves, 60–150 mm long. [2] [5] Bedfordia linearis and Bedfordia salicina are known to hybridise, resulting in intermediary characteristics between both species. [5]

Related Research Articles

<i>Eucalyptus regnans</i> Species of eucalyptus

Eucalyptus regnans, known variously as mountain ash, swamp gum, or stringy gum, is a species of medium-sized to very tall forest tree that is native to the Australia states of Tasmania and Victoria. It is a straight-trunked tree with smooth grey bark, but with a stocking of rough brown bark at the base, glossy green, lance-shaped to curved adult leaves, flower buds in groups of between nine and fifteen, white flowers, and cup-shaped or conical fruit. It is the tallest of all flowering plants; the tallest measured living specimen, named Centurion, stands 100 metres tall in Tasmania.

<span class="mw-page-title-main">Sclerophyll</span> Type of plant

Sclerophyll is a type of vegetation that is adapted to long periods of dryness and heat. The plants feature hard leaves, short internodes and leaf orientation which is parallel or oblique to direct sunlight. The word comes from the Greek sklēros (hard) and phyllon (leaf). The term was coined by A.F.W. Schimper in 1898, originally as a synonym of xeromorph, but the two words were later differentiated.

<i>Lomatia tasmanica</i> Tasmanian shrub from the family Proteaceae

Lomatia tasmanica, commonly known as King's lomatia, is a shrub of the family Proteaceae native to Tasmania. Growing up to 8 metres (26 ft) tall, the plant has shiny green pinnate (lobed) leaves and bears red flowers in the summer, but yields neither fruit nor seeds. King's lomatia is unusual because all of the remaining plants are genetically identical clones. Because it has three sets of chromosomes and is therefore sterile, reproduction occurs only vegetatively: when a branch falls, that branch grows new roots, establishing a new plant that is genetically identical to its parent.

Dogwood is a common name for trees and shrubs in the temperate Northern Hemisphere genus Cornus.

<i>Phyllocladus aspleniifolius</i> Species of conifer

Phyllocladus aspleniifolius, commonly known as the celerytop pine, is an endemic gymnosperm of Tasmania, Australia. It is widespread and common in Tasmania, with the most abundance in the western highlands. Its ‘leaves’ appear similar to those of a celery plant, hence the common name.

<span class="mw-page-title-main">Quamby Bluff</span>

Quamby Bluff is a mountain in Northern Tasmania, Australia that is an outlying part of the Great Western Tiers mountain range.

<i>Bursaria spinosa</i> Species of plant

Bursaria spinosa is a small tree or shrub in the family Pittosporaceae. The species occurs mainly in the eastern and southern half of Australia and not in Western Australia or the Northern Territory. Reaching 10 m (35 ft) high, it bears fragrant white flowers at any time of year but particularly in summer. A common understorey shrub of eucalyptus woodland, it colonises disturbed areas and fallow farmland. It is an important food plant for several species of butterflies and moths, particularly those of the genus Paralucia, and native bees.

<i>Eucalyptus coccifera</i> Species of eucalyptus

Eucalyptus coccifera, commonly known as the Tasmanian snow gum, is a small to medium-sized tree endemic to Tasmania. It has smooth, grey and cream-coloured bark, elliptic to lance-shaped adult leaves, flower buds in groups of between three and nine, usually white flowers and conical, hemispherical or cup-shaped fruit.

<i>Leptospermum lanigerum</i> Species of shrub

Leptospermum lanigerum, commonly known as the woolly teatree, is a small tree or medium shrub from the plant family Myrtaceae. Its common name derives from the conspicuously hairy capsules produced as fruit, along with the fine, silky hairs present on branches and leaves. L. lanigerum is widespread in many habitats, particularly in waterlogged areas such as moist, sandy coastal heaths, on river banks, riparian scrub, woodlands and on the fringe of montane grasslands. This species is endemic to Australia, with native populations occurring in New South Wales, South Australia, Tasmania and Victoria.

<i>Olearia phlogopappa</i> Species of flowering plant

Olearia phlogopappa commonly known as the dusty daisy-bush or alpine daisy-bush is a species of flowering plant in the family Asteraceae that is commonly found in eastern New South Wales, Victoria and Tasmania. It is a small shrub with greyish-green foliage, daisy-like flowers in white, pink or mauve that can be seen from spring to late summer.

<i>Acacia gunnii</i> Species of plant

Acacia gunnii, commonly known as ploughshare wattle or dog's tooth wattle, is a woody shrub which is endemic to south-eastern Australia found in dry heaths and woodlands. It ranges from Queensland, then New South Wales, Australian Capital Territory, Victoria, South Australia, down to Tasmania. Acacia gunnii grows to up to 1 metre high and has prickly phyllodes which are 4 to 15 mm long. The cream to pale yellow globular flowerheads appear singly in the axils of the phyllodes in June to October, followed by curved or coiled seed pods which are 40 mm long and 4 to 5 mm wide. Acacia gunnii grows up to 1 meter tall and has prickly phyllodes which are 4 to 15mm in length with cream to pale-yellow globular flower heads appearing in phyllode axils in June through to October, followed by curved or coiled seed pods which are 40mm long and 4 to 5 mm wide. The species was first formally described by English botanist George Bentham in the London Journal of Botany in 1842. It occurs in South Australia, Victoria, Tasmania, New South Wales, Australian Capital Territory, and Queensland.

<i>Pomaderris apetala</i> Species of tree

Pomaderris apetala is a small tree or large shrub from the family Rhamnaceae, growing in Victoria, New Zealand and Tasmania.

<i>Cyathodes glauca</i> Species of tree

Cyathodes glauca, the purple cheeseberry, is a woody shrub or small tree common in Tasmania, Australia. It belongs to the 'heath' family, Ericaceae. 'Heath' refers to open, shrub-like communities which survive on well-drained and poor quality soils.

<span class="mw-page-title-main">Tasmanian dry sclerophyll forests</span>

Dry sclerophyll forests occur throughout northern and eastern Tasmania. Characterised by the population of hard-leafed (sclerophyll) and often spiky, drought-adapted plants, dry sclerophyll forests are found in regions of where annual rainfall is below 1000mm.

<i>Eucalyptus pulchella</i> Species of eucalyptus

Eucalyptus pulchella, commonly known as the white peppermint or narrow-leaved peppermint, is a species of small to medium-sized tree that is endemic to Tasmania. it has smooth bark, sometimes with rough fibrous bark on older trees, linear leaves, flower buds in groups of nine to twenty or more, white flowers and cup-shaped to shortened spherical fruit.

Tasmania can be broadly divided into two distinct regions, eastern and western, that exhibit major differences in climate, geology and vegetation. This divide, termed Tyler’s Corridor, runs from just south of the northwestern corner, and continues south, cutting roughly down the center of the island. The vegetation changes occur principally due to variations in soil types, which are a result of the geological composition, and the vast difference in climate across the state. Generally, the west has a higher mean rainfall but poor acidic soil while the east has a lower mean rainfall but slightly more fertile soil. This results in a larger proportion of rainforest, moorland and wet sclerophyll vegetation dominating in the west and predominantly dry sclerophyll in the east.

<i>Eucalyptus urnigera</i> Species of eucalyptus

Eucalyptus urnigera, commonly known as urn tree, is a species of small to medium-sized tree that is endemic to Tasmania. It has smooth bark, lance-shaped or elliptical leaves, flower buds in groups of three, white flowers and urn-shaped fruit.

<span class="mw-page-title-main">Ecology of Sydney</span> Geographic aspect of Sydney, Australia

The ecology of Sydney, located in the state of New South Wales, Australia, is diverse for its size, where it would mainly feature biomes such as grassy woodlands or savannas and some sclerophyll forests, with some pockets of mallee shrublands, riparian forests, heathlands, and wetlands, in addition to small temperate rainforest fragments.

<span class="mw-page-title-main">Tasmanian temperate forests</span> Ecoregion in Tasmania, Australia

The Tasmanian temperate forests is a temperate broadleaf and mixed forests ecoregion in Australia. The ecoregion occupies the eastern portion of the island of Tasmania, which lies south of the Australian mainland.

<span class="mw-page-title-main">Tasmanian Central Highland forests</span> Terrestrial ecoregion in Tasmania, Australia

The Tasmanian Central Highland forests is a temperate broadleaf and mixed forests ecoregion in Australia. It covers Tasmania's Central Highlands region.

References

  1. Germplasm Resources Information Network (GRIN) (2015-02-17). "Species: Bedfordia salicina (labill.) DC". Taxonomy for Plants. USDA, ARS, National Genetic Resources Program, National Germplasm Resources Laboratory, Beltsville, Maryland. Archived from the original on 2011-06-05. Retrieved 2022-02-13.
  2. 1 2 3 4 5 6 Tasmania's natural flora. Jenny Whiting, Tasmania's Natural Flora Editorial Committee. Ulverstone, Tas.: Tasmania's Natural Flora Editorial Committee. 2004. ISBN   0-646-43916-2. OCLC   63691373.{{cite book}}: CS1 maint: others (link)
  3. "Bedfordia arborescens (tree blanketleaf) Listing Statement (PDF), Department of Primary Industries and Water, Tasmania". Tasmanian Natural Values Atlas . 2008. Archived from the original on 2018-03-28.
  4. Orchard, A.E. 2004. A revision of Bedfordia DC. (Asteraceae) Muelleria. 19: 81–94
  5. 1 2 3 4 5 6 7 8 9 10 Flora of Australia Volume 37, Asteraceae 1. Melbourne: Australian Biological Resources Study, CSIRO Publishing. 2015.
  6. 1 2 3 4 5 Reid, James; Hill, Robert; Brown, Michael; Hovenden, Mark (1999). Vegetation of Tasmania. Monotone Art Printers, Tasmania: Australian Biological Resources Study. pp. 234–259. ISBN   0-642-56801-4.
  7. Scanlan, Ian; McElhinny, Chris; Turner, Perpetua (2010). "A Methodology for Modelling Canopy Structure: An Exploratory Analysis in the Tall Wet Eucalypt Forests of Southern Tasmania". Forests. 1 (1): 4–24. doi: 10.3390/f1010004 . ISSN   1999-4907.
  8. Buettel, Jessie; Ringwaldt, Elise; Hovenden, Mark; Brook, Barry (2019). "Importance of the Local Environment on Nutrient Cycling and Litter Decomposition in a Tall Eucalypt Forest". Forests. 10 (4): 340. doi: 10.3390/f10040340 . ISSN   1999-4907.
  9. Gill, A.M. (1981). Adaptive responses of Australian plant species to fires. Australian Academy of Science: Canberra: Fire and the Australian Biota. pp. 243–272.
  10. Dickinson, K. J. M.; Kirkpatrick, J. B. (1985). "The Flammability and Energy Content of Some Important Plant Species and Fuel Components in the Forests of Southeastern Tasmania". Journal of Biogeography. 12 (2): 121. doi:10.2307/2844836. ISSN   0305-0270. JSTOR   2844836.
  11. Hazeldine, Alister; Kirkpatrick, Jamie B. (2015). "Practical and theoretical implications of a browsing cascade in Tasmanian forest and woodland". Australian Journal of Botany. 63 (5): 435. doi:10.1071/bt14334. ISSN   0067-1924.
  12. Deans, Bianca J.; de Salas, Miguel; Smith, Jason A.; Bissember, Alex C. (2018). "Natural Products Isolated from Endemic Tasmanian Vascular Plants". Australian Journal of Chemistry. 71 (10): 756. doi: 10.1071/ch18283 . ISSN   0004-9425.
  13. "Vascular Plants". biodiversity.org.au. Retrieved 2022-02-18.