Grevilleoideae

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Grevilleoideae
Hakea laurina Tas.jpg
Inflorescence and leaves of the pin-cushion hakea ( Hakea laurina )
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Subfamily: Grevilleoideae
Engl.
Genera

See text

The Grevilleoideae are a subfamily of the plant family Proteaceae. Mainly restricted to the Southern Hemisphere, it contains around 46 genera and about 950 species. Genera include Banksia , Grevillea , and Macadamia .

Contents

Description

The Grevilleoideae grow as trees, shrubs, or subshrubs. They are highly variable, making a simple, diagnostic identification key for the subfamily essentially impossible to provide. One common and fairly diagnostic characteristic is the occurrence of flowers in pairs that share a common bract. However, a few Grevilleoideae taxa do not have this property, having solitary flowers or inflorescences of unpaired flowers. In most taxa, the flowers occur in densely packed heads or spikes, and the fruit is a follicle.

Distribution and habitat

Grevilleoideae are mainly a Southern Hemisphere family. The main centre of diversity is Australia, with around 700 of 950 species occurring there, and South America also contains taxa. However, the Grevilleoideae are barely present in Africa, where almost all of Proteaceae taxa belong to the subfamily Proteoideae. [1] The lone exception and only grevilleoid in Africa is the Brabejum tree of Cape Town.

Taxonomy

Stenocarpus sinuatus (firewheel tree) Sten sinuatus.jpg
Stenocarpus sinuatus (firewheel tree)
Lomatia silaifolia Lomatia silaifolia email.jpg
Lomatia silaifolia
Telopea oreades, the Gippsland waratah Teloreades1.jpg
Telopea oreades , the Gippsland waratah
Grevillea banksii Grevillia banksii0.jpg
Grevillea banksii
Banksia sessilis (parrotbush) Dryandra sessilis 2 cape Naturaliste email.jpg
Banksia sessilis (parrotbush)

The framework for classification of the Proteaceae was laid by L.A.S. Johnson and Barbara Briggs in their 1975 monograph "On the Proteaceae: the evolution and classification of a southern family". [2] Their classification has been refined somewhat over the ensuing three decades, most notably by Peter H. Weston and Nigel Barker in 2006. The Grevilleoideae are now considered one of five subfamilies of the Proteaceae. The placement and circumscription of the Grevilleoideae in four tribes, according to Weston and Barker can be summarised as: [3]

Sphalmium   Carnarvonia

Roupaleae

Authority: Meisn.

incertae sedis
Megahertzia   Knightia   Eucarpha   Triunia
Subtribe Roupalinae L.A.S.Johnson & B.G.Briggs
Roupala   Neorites   Orites
Subtribe Lambertiinae (Venk.Rao) L.A.S.Johnson & B.G.Briggs
Lambertia   Xylomelum
Subtribe Heliciinae L.A.S.Johnson & B.G.Briggs
Helicia   Hollandaea
Subtribe Floydiinae L.A.S.Johnson & B.G.Briggs
Darlingia   Floydia

Banksieae

Authority: Rchb.

fossil form genera
Banksieaeidites   Banksieaeformis   Banksieaephyllum
Subtribe Musgraveinae L.A.S.Johnson & B.G.Briggs
Musgravea   Austromuellera
Subtribe Banksiinae L.A.S.Johnson & B.G.Briggs
Banksia

Embothrieae

Authority: Rchb.

Subtribe Lomatiinae L.A.S.Johnson & B.G.Briggs
Lomatia
Subtribe Embothriinae Endl.
Embothrium   Oreocallis   Alloxylon   Telopea
Subtribe Stenocarpinae L.A.S.Johnson & B.G.Briggs
Stenocarpus   Strangea
Subtribe Hakeinae Endl.
Opisthiolepis   Buckinghamia   Hakea   Grevillea   Finschia

Macadamieae

Authority: Venk.Rao

Subtribe Macadamiinae L.A.S.Johnson & B.G.Briggs
Macadamia   Panopsis   Brabejum
Subtribe Malagasiinae P.H.Weston & N.P.Barker
Malagasia   Catalepidia
Subtribe Virotiinae P.H.Weston & N.P.Barker
Virotia   Athertonia   Heliciopsis
Subtribe Gevuininae L.A.S.Johnson & B.G.Briggs
Cardwellia   Euplassa   Gevuina   Bleasdalea   Hicksbeachia   Kermadecia  

Uses

Edible nuts of Macadamia MacNut2.JPG
Edible nuts of Macadamia

The nursery industry cultivates many Grevilleoideae species as barrier plants and for their prominent and distinctive flowers and foliage. Some species are of importance to the cut-flower industry, especially some Banksia and Dryandra species. Two species of the genus Macadamia and the Chilean species Gevuina avellana (Chilean hazel) are grown commercially for edible nuts. Chilean hazel has an acceptable frost tolerance.

Related Research Articles

<i>Knightia</i> (plant) Genus of plants of the family Proteaceae endemic to New Zealand

Knightia is a small genus of the family Proteaceae endemic to New Zealand, named in honor of Thomas Andrew Knight. One extant species, K. excelsa (rewarewa) is found in New Zealand. Two further Knightia species are found in New Caledonia, although they were placed in the genus Eucarpha by Lawrie Johnson and Barbara Briggs in their influential 1975 monograph "On the Proteaceae: the evolution and classification of a southern family", a placement supported in a 2006 classification of the Proteaceae. A fossil species from upper Miocene deposits in Kaikorai has been described as Knightia oblonga. Knightia has been placed in the tribe Roupaleae of the subfamily Grevilleoideae.

<i>Xylomelum</i> Genus of plants in the family Proteaceae native to Australia

Xylomelum is a genus of six species of flowering plants, often commonly known as woody pears, in the family Proteaceae and are endemic to Australia. Plants in this genus are tall shrubs or small trees with leaves arranged in opposite pairs, relatively small flowers arranged in spike-like groups, and the fruit a woody, more or less pear-shaped follicle.

<i>Adenanthos</i> Genus of Australian native shrubs in the flowering plant family Proteaceae

Adenanthos is a genus of Australian native shrubs in the flowering plant family Proteaceae. Variable in habit and leaf shape, it is the only genus in the family where solitary flowers are the norm. It was discovered in 1791, and formally published by Jacques Labillardière in 1805. The type species is Adenanthos cuneatus, and 33 species are recognised. The genus is placed in subfamily Proteoideae, and is held to be most closely related to several South African genera.

<i>Hicksbeachia</i> Genus of trees in the family Proteaceae from eastern Australia

Hicksbeachia is a genus of two species of trees in the family Proteaceae. They are native to rainforests of northern New South Wales and southeastern Queensland. They are commonly known as red bopple nut or beef nut due to the bright red colour of their fruits.

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.

<span class="mw-page-title-main">Proteaceae</span> Family of flowering plants

The Proteaceae form a family of flowering plants predominantly distributed in the Southern Hemisphere. The family comprises 83 genera with about 1,660 known species. Australia and South Africa have the greatest concentrations of diversity. Together with the Platanaceae, Nelumbonaceae and in the recent APG IV system the Sabiaceae, they make up the order Proteales. Well-known 'Proteaceae genera include Protea, Banksia, Embothrium, Grevillea, Hakea and Macadamia. Species such as the New South Wales waratah, king protea, and various species of Banksia, Grevillea, and Leucadendron are popular cut flowers. The nuts of Macadamia integrifolia are widely grown commercially and consumed, as are those of Gevuina avellana on a smaller scale.

Triunia is a genus of medium to tall shrubs or small trees found as understorey plants in rainforests of eastern Australia. Members of the plant family Proteaceae, they are notable for their poisonous fleshy fruits or drupes. Only one species, T. youngiana, is commonly seen in cultivation.

<i>Buckinghamia</i> Genus of trees in the family Proteaceae endemic to north eastern Queensland, Australia

Buckinghamia is a genus of only two known species of trees, belonging to the plant family Proteaceae. They are endemic to the rainforests of the wet tropics region of north eastern Queensland, Australia. The ivory curl flower, B. celsissima, is the well known, popular and widely cultivated species in gardens and parks, in eastern and southern mainland Australia, and additionally as street trees north from about Brisbane. The second species, B. ferruginiflora, was only recently described in 1988.

<i>Xylorycta</i> Moth genus in family Xyloryctidae

Xylorycta is a genus of moths of the family Xyloryctidae. Xylorycta species are found in Africa and Australia and are strongly associated with the plant family Proteaceae, being found on Hakea, Lambertia, Grevillea, Leptospermum, Macadamia, Oreocallis, Persoonia and Telopea. The larvae of some species bore into stems or branches, or the flower spikes of Banksia, but most live in a silk gallery spun in the foliage.

<i>Roupala</i> Genus of plants in the family Proteaceae from Mexico to Argentina

Roupala is a Neotropical genus of woody shrubs and trees in the plant family Proteaceae. Its 34 species are generally found in forests from sea level to 4000 m altitude from Mexico to Argentina.

<i>Telopea mongaensis</i> Species of plant in the family Proteaceae endemic to south eastern New South Wales, Australia

Telopea mongaensis, commonly known as the Monga waratah or Braidwood waratah, is a shrub or small tree in the family Proteaceae. Endemic to Australia, it grows at high altitude in south eastern New South Wales, where it is often seen in moist areas at the edge of rainforest or by streams in eucalyptus forests. Growing to 6 m (20 ft) high, it has narrow green leaves 4–18 cm (1.6–7.1 in) in length, and 0.5–2 cm (0.20–0.79 in) wide. In spring bears many red flowerheads, each made up of 28 to 65 individual flowers.

<span class="mw-page-title-main">Proteoideae</span> Subfamily of flowering plants

Proteoideae is one of the five subfamilies of the plant family Proteaceae. The greatest diversity is in Africa, but there are also many species in Australia; a few species occur in South America, New Caledonia, and elsewhere.

<i>Telopea aspera</i> Species of plant in the family Proteaceae from New South Wales in Australia

Telopea aspera, commonly known as Gibraltar Range waratah, is a plant in the family Proteaceae. It grows as a woody shrub to 3 metres (10 ft) high with leathery rough leaves and bright red flower heads known as inflorescences—each composed of hundreds of individual flowers. It is endemic to the New England region in New South Wales in Australia. It was formally described as a species by botanists Peter Weston and Mike Crisp in 1995, separated from its close relative Telopea speciosissima by its rough foliage and preference for dryer habitat. Unlike its better known relative, Telopea aspera has rarely been cultivated.

<i>Agastachys</i> Monotypic genus of flowering shrub in the family Proteaceae

Agastachys odorata, commonly known as the white waratah or fragrant candlebush, is the sole member of the genus Agastachys in the protea family. It is an evergreen shrub to small tree and is endemic to the heaths and button grass sedgelands of western Tasmania.

<i>Cenarrhenes</i> Monotypic genus of plants in the family Proteaceae

Cenarrhenes is a monytypic genus in the family Proteaceae containing the single species Cenarrhenes nitida, known as the Port Arthur plum or native plum. Cenarrhenes nitida is an evergreen shrub to small tree endemic to the rainforests and scrublands of western Tasmania. It bears white flowers in late spring followed by the development of fleshy fruit.

<i>Darlingia ferruginea</i> Species of rainforest tree of the family Proteaceae from Northern Queensland

Darlingia ferruginea, commonly known as the brown silky oak, is a rainforest tree of the family Proteaceae from Northern Queensland.

Neorites is a monotypic genus of plants in the family Proteaceae. The sole species Neorites kevedianus, commonly called fishtail oak or fishtail silky oak, is a tall tree endemic to the wet tropics rainforests of north eastern Queensland, Australia.

<i>Opisthiolepis</i> Genus of plants

Opisthiolepis is a monotypic genus of trees in the macadamia family Proteaceae. The sole species is Opisthiolepis heterophylla, commonly known as blush silky oak, pink silky oak, brown silky oak or drunk rabbit. It was first described in 1952 and is endemic to a small part of northeastern Queensland, Australia.

<i>Placospermum</i> Genus of trees

Placospermum is a genus of a single species of large trees, constituting part of the plant family Proteaceae. The species Placospermum coriaceum is endemic to the rainforests of the wet tropics region of northeastern Queensland, Australia. Common names include rose silky oak and plate-seeded oak.

References

  1. Orchard, Anthony E. (ed.). "Proteaceae". Flora of Australia, Volume 16: Elaeagnaceae, Proteaceae 1. Melbourne: Australian Biological Resources Study / CSIRO Publishing. Archived from the original on 2006-10-31. Retrieved 2006-06-28.{{cite book}}: |author= has generic name (help)
  2. L. A. S. Johnson and Briggs, B. G. (1975). "On the Proteaceae: the evolution and classification of a southern family". Journal of the Linnean Society of London. Botany. 70 (2): 83–182. doi:10.1111/j.1095-8339.1975.tb01644.x.
  3. Weston, Peter H.; Barker, Nigel P. (2006). "A new suprageneric classification of the Proteaceae, with an annotated checklist of genera" (PDF). Telopea. 11 (3): 314–344. doi:10.7751/telopea20065733. Archived from the original (PDF) on 2009-10-02.