Brachychiton

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Brachychiton
Illawarra Flame Tree (Brachychiton acerifolius).jpg
Brachychiton acerifolius
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Malvaceae
Subfamily: Sterculioideae
Genus: Brachychiton
Schott & Endl.
Species

See text

Brachychiton (kurrajong, bottletree) is a genus of 31 species of trees and large shrubs, native to Australia (the centre of diversity, with 30 species) and New Guinea (one species). Fossils from New South Wales and New Zealand are estimated to be 50 million years old, corresponding to the Paleogene.

Contents

They grow to 4 – 30m tall, and some are dry-season deciduous. Several species (though not all) are pachycaul plants with a very stout stem for their overall size, used to store water during periods of drought. The leaves show intraspecific variation and generally range from entire to deeply palmately lobed with long slender leaflet-like lobes joined only right at the base. Their sizes range from 4 – 20 cm long and wide.

All species are monoecious with separate male and female flowers on the same plant. The flowers have a bell-shaped perianth consisting of a single series of fused lobes which is regarded as a calyx despite being brightly coloured in most species. The female flowers have five separate carpels that can each form a woody fruit containing several seeds. The flower colour is often variable within species. Eastern forest species drop their foliage before flowering but those of the drier regions carry the flowers while in leaf.

A few species of Kurrajong are popular garden trees and have been introduced to hot dry regions including the Mediterranean, South Africa and the western United States. These species are also hybridised for horticultural purposes, B. populneo-acerifolius being one example. Kurrajongs are known to bloom erratically in cultivation.

Name

The name Brachychiton is derived from the Greek brachys, short, and chiton , tunic, in referring to its loose seed coats. The generic name is often misconstrued as being of neuter gender, with the specific epithets then incorrectly amended. Thus B. rupestre and B. populneum are sometimes seen in horticultural books and magazines.

Kurrajong comes from the Dharuk language garrajuŋ 'fishing line', as fishing lines were made from kurrajong bark. [1]

Species

B. bidwillii flowers Brachychiton bidwillii flowers.jpg
B. bidwillii flowers

Species include: [2]

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<i>Brachychiton acerifolius</i> Species of tree in the family Malvaceae

Brachychiton acerifolius is a large tree of the family Malvaceae endemic to tropical and subtropical regions on the east coast of Australia. It is famous for the bright red bell-shaped flowers that often cover the whole tree when it is leafless. It is commonly known as the flame tree, Illawarra flame tree, lacebark tree, or kurrajong.

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Sterculia quadrifida, also known as the peanut tree, monkey nut or red-fruited kurrajong is a small tree that grows in the rainforests, vine thickets, and gallery forests of New Guinea and northern Australia.

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<i>Brachychiton rupestris</i> Tree in the family Malvaceae native to Queensland, Australia

Brachychiton rupestris is a tree in the family Malvaceae, endemic to Queensland, Australia. Described by Sir Thomas Mitchell and John Lindley in 1848, it earned its name from its bulbous trunk, which can be up to 3.5 metres (11 ft) in diameter at breast height (DBH). Reaching around 10–25 m (33–82 ft) high, the Queensland bottle tree is deciduous, losing its leaves seasonally, between September and December. The leaves are simple or divided, with one or more narrow leaf blades up to 11 centimetres (4 in) long and 2 cm (0.8 in) wide. Cream-coloured flowers appear from September to November, and are followed by woody, boat-shaped follicles that ripen from November to May. No subspecies are recognised.

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

Eucalyptus melliodora, commonly known as yellow box, honey box or yellow ironbark, is a species of medium-sized to occasionally tall tree that is endemic to south-eastern, continental Australia. It has rough, flaky or fibrous bark on part or all of the trunk, smooth greyish to yellowish bark above. The adult leaves are lance-shaped to egg-shaped, the flower buds are arranged in groups of seven and the fruit is more or less hemispherical.

<i>Brachychiton populneus</i> Species of tree

Brachychiton populneus, commonly known as the kurrajong, is a small to medium-sized tree found naturally in Australia in a diversity of habitats from wetter coastal districts to semi-arid interiors of Victoria, New South Wales and Queensland. Carrejun and carrejan were the indigenous names of trees in the foothills of the Blue Mountains near Sydney, and the bark was used for twine and fishing lines. The extended trunk is a water storage device for survival in a warm dry climate. The bell-shaped flowers are variable in colour, while the leaves vary considerably in shape. The leaves are either simple and pointed, or may be 3–9 lobed. Saplings grow from a drought and fire-resistant tap-rooted tuber.

<i>Brachychiton discolor</i> Species of tree

Brachychiton discolor is a rainforest tree of eastern Australia. It grows in drier rainforest areas. Scattered from Paterson, New South Wales to Mackay, Queensland. There is also an isolated community of these trees at Cape York Peninsula.

<i>Brachychiton gregorii</i> Species of plant

Brachychiton gregorii, commonly known as the desert kurrajong, is a small tree of the genus Brachychiton found in northern and western Australia. It was originally classified in the family Sterculiaceae, which is now within Malvaceae.

<i>Brachychiton megaphyllus</i> Species of tree

Brachychiton megaphyllus, commonly known as the red-flowering kurrajong, is a tree of the genus Brachychiton found in northern Australia.

<i>Brachychiton</i> sp. Ormeau Species of tree

Brachychiton sp. Ormeau is a rare and endangered rainforest tree found in Queensland, Australia.

References

  1. Dixon, R.M.W.; Moore, Bruce; Ramson, W. S.; Thomas, Mandy (2006). Australian Aboriginal Words in English: Their Origin and Meaning (2nd ed.). South Melbourne: Oxford University Press. p. 114. ISBN   0-19-554073-5.
  2. The Plant List , retrieved 5 October 2016

Further reading