''Banksia'' sect. ''Oncostylis'' is one of four sections of

subgenus In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between t ...

''Banksia'' subg. ''Banksia''. It contains those ''

Banksia ''Banksia'' is a genus of around 170 species in the plant family Proteaceae. These Australian wildflowers and popular garden plants are easily recognised by their characteristic flower spikes, and fruiting "cones" and heads. ''Banksias'' range i ...

'' species with hooked

pistil Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...

s. All of the species in ''Oncostylis'' also exhibit a top-down sequence of flower

anthesis Anthesis is the period during which a flower is fully open and functional. It may also refer to the onset of that period. The onset of anthesis is spectacular in some species. In ''Banksia'' species, for example, anthesis involves the extension ...

, except for ''

Banksia nutans ''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 pur ...

'' which is bottom-up. ''Banksia'' sect. ''Oncostylis'' is further divided into four series, primarily on the overall shape of the

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

: * ''Banksia'' ser. ''Spicigerae'' consists of seven species with

cylindrical A cylinder (from ) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infini ...

inflorescences. * ''Banksia'' ser. ''Tricuspidae'' contains a single species, ''

Banksia tricuspis ''Banksia tricuspis'', commonly known as Lesueur banksia or pine banksia, is a plant in the family Proteaceae and is endemic to a small area in the south-west of Western Australia. It is a stunted tree or shrub with narrow leaves and cylindrical ...

''. * ''Banksia'' ser. ''Dryandroideae'' contains a single species, ''

Banksia dryandroides ''Banksia dryandroides'', the dryandra-leaved banksia, is a species of small shrub in the plant genus ''Banksia''. The Noongar peoples know the tree as manyat. It occurs in shrubland, woodland and kwongan on the south coast of Western Australia ...

''. * ''Banksia'' ser. ''Abietinae'' contains 13 species with inflorescences that are

spherical A sphere () is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. A sphere is the set of points that are all at the same distance from a given point in three-dimensional space.. That given point is the ce ...

or nearly so. All ''Oncostylis'' species are endemic to

southwest The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each sepa ...

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

, except for two members of series ''Spicigerae'', ''

Banksia ericifolia ''Banksia ericifolia'', the heath-leaved banksia, or lantern banksia, is a species of woody shrub of the family Proteaceae native to Australia. It grows in two separate regions of Central and Northern New South Wales east of the Great Divid ...

'' (Heath-leaved Banksia) and ''

Banksia spinulosa ''Banksia spinulosa'', the hairpin banksia, is a species of woody shrub, of the genus ''Banksia'' in the family Proteaceae, native to eastern Australia. Widely distributed, it is found as an understorey plant in open dry forest or heathland ...

'' (Hairpin Banksia), which are endemic to the east coast of

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

References

* * *

External links

* * {{Taxonbar, from=Q2882760 sect. Oncostylis Plant sections Taxa named by George Bentham

See also

References

External links