Calytrix Empetroides
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''Calytrix'' is a genus of about 83 species of flowering plants, commonly known as star flowers, in the family
Myrtaceae Myrtaceae (), the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All ...
and is
endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to Australia. Plants in the genus ''Calytrix'' are small to large shrubs with small, spreading and more or less round leaves, the flowers arranged singly in leaf axils. The flowers are
bisexual Bisexuality is romantic attraction, sexual attraction, or sexual behavior toward both males and females. It may also be defined as the attraction to more than one gender, to people of both the same and different gender, or the attraction t ...
with 5 overlapping
sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 Etymology The term ''sepalum'' ...
s with a long awn, and many
stamen The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament ...
s.


Description

Plants in the genus ''Calytrix'' are dwarf to large shrubs with overlapping or widely-spaced leaves, but with
stipule In botany, a stipule is an outgrowth typically borne on both sides (sometimes on just one side) of the base of a leafstalk (the petiole (botany), petiole). They are primarily found among dicots and rare among monocots. Stipules are considered part ...
s absent or small. The flowers are arranged singly in leaf axils with 2 bracteoles at the base. The floral tube is usually long and tube-shaped with 5 overlapping sepals with a long awn on the end and 5 lance-shaped to elliptic petals that are free from each other and fall from the flower as it develops. There are many stamens, in one to several
whorls A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). In nature File:Photograph and axial plane floral diagram ...
. The fruit is a small, dry nut containing a single seed.


Taxonomy

The genus ''Calytrix'' was first formally described in 1806 by
Jacques Labillardière Jacques-Julien Houtou de Labillardière (28 October 1755 – 8 January 1834) was a French biologist noted for his descriptions of the flora of Australia. Labillardière was a member of a voyage in search of the Jean-François de Galaup, comte ...
in his '' Novae Hollandiae Plantarum Specimen'', and the first species he described (the
type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...
was '' Calytrix tetragona''. The genus name (''Calytrix'') means "calyx hair", referring to the sepal awns.


Distribution

''Calytrix'' are
endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to Australia, occurring in the
Northern Territory The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regi ...
,
Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...
and
South Australia South Australia (commonly abbreviated as SA) is a States and territories of Australia, state in the southern central part of Australia. With a total land area of , it is the fourth-largest of Australia's states and territories by area, which in ...
, but the majority of species occur in the south-west of
Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...
.


Species list

The following is a list of ''Calytrix'' species accepted by the
Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Sys ...
as at June 2024: * '' Calytrix achaeta'' (F.Muell.) Benth. – white-flowered turkey bush, kerosene wood, fringe-myrtle (N.T., W.A.) * '' Calytrix acutifolia'' (Lindl.) Craven (W.A.) * '' Calytrix alpestris'' (Lindl.) Court - snow myrtle (Vic., S.A.) * '' Calytrix amethystina'' Craven (W.A.) * '' Calytrix angulata'' Lindl. - yellow starflower (W.A.) * '' Calytrix arborescens'' (F.Muell.) Benth. (N.T.) * '' Calytrix asperula'' (Schauer) Benth. - brush starflower (W.A.) * '' Calytrix aurea'' Lindl. (W.A.) * '' Calytrix birdii'' (F.Muell.) B.D.Jacks. (W.A.) * '' Calytrix brevifolia'' (Meisn.) Benth. (W.A.) * '' Calytrix breviseta'' Lindl. (W.A.) * '' Calytrix brownii'' (Schauer) Craven (W.A., N.T., Qld.) * '' Calytrix carinata'' Craven (W.A., N.T., S.A., Qld.) * '' Calytrix chrysantha'' Craven (W.A.) * '' Calytrix cravenii'' Nge & K.R.Thiele (W.A.) * '' Calytrix creswellii'' (F.Muell.) B.D.Jacks. (W.A.) * '' Calytrix decandra'' DC. - pink starflower (W.A.) * '' Calytrix decussata'' Craven (N.T.) * '' Calytrix depressa'' (Turcz.) Benth. (W.A.) * '' Calytrix desolata'' S.Moore (W.A.) * '' Calytrix divergens'' Craven (W.A.) * '' Calytrix drummondii'' (Meisn.) Craven (W.A.) * '' Calytrix duplistipulata'' Craven (W.A.) * '' Calytrix ecalycata'' Craven (W.A.) * '' Calytrix eneabbensis'' Craven (W.A.) * '' Calytrix erosipetala'' Craven (W.A.) * '' Calytrix exstipulata'' DC. - turkey bush, Kimberley heather, heather bush, pink fringe-myrtle (W.A., N.T., Qld.) * '' Calytrix faucicola'' Craven (N.T.) * '' Calytrix flavescens'' A.Cunn. - summer starflower (W.A.) * '' Calytrix formosa'' Craven (W.A.) * '' Calytrix fraseri'' A.Cunn. - pink summer calytrix (W.A.) * '' Calytrix glaberrima'' (F.Muell.) Craven – smooth fringe-myrtle (S.A.) * ''
Calytrix glutinosa ''Calytrix glutinosa'' is a species of flowering plant in the myrtle family Myrtaceae and is endemic to the south-west of Western Australia. It is a more or less glabrous shrub with linear leaves and clusters of pink to mauve flowers with about ...
'' Lindl. (W.A.) * '' Calytrix gomphrenoides'' M.D.Barrett & Craven (W.A.) * '' Calytrix gracilis'' Benth. (W.A.) * '' Calytrix gurulmundensis'' Craven (Qld.) * '' Calytrix gypsophila'' Craven (W.A., S.A.) * '' Calytrix habrantha'' Craven (W.A.) * '' Calytrix harvestiana'' (F.Muell.) Craven (W.A.) * '' Calytrix hirta'' (Regel) Nge & K.R.Thiele (W.A.) * '' Calytrix hislopii'' Rye (W.A.) * '' Calytrix inopinata'' Craven (N.T.) * '' Calytrix involucrata'' J.M.Black - cup fringe-myrtle (S.A.) * '' Calytrix islensis'' Craven (Qld.) * '' Calytrix leptophylla'' Benth. (Qld.) * '' Calytrix leschenaultii'' (Schauer) Benth. (W.A.) * '' Calytrix longiflora'' (F.Muell.) Benth. (Qld., N.S.W.) * '' Calytrix megaphylla'' (F.Muell.) Benth. (N.T.) * '' Calytrix merralliana'' (F.Muell. & Tate) Craven (W.A.) * '' Calytrix micrairoides'' Craven (N.T.) * '' Calytrix microcoma'' Craven – turkey bush (Qld.) * '' Calytrix mimiana'' Craven (N.T.) * '' Calytrix nematoclada'' Craven (W.A.) * '' Calytrix oldfieldii'' Benth. (W.A.) * '' Calytrix oncophylla'' Craven (W.A.) * '' Calytrix parvivallis'' Craven (W.A.) * '' Calytrix patrickiae'' Rye (W.A.) * '' Calytrix paucicostata'' Craven (W.A.) * '' Calytrix pimeleoides'' C.A.Gardner ex Keighery (W.A.) * '' Calytrix platycheiridia'' Craven (W.A.) * '' Calytrix plumulosa'' (F.Muell.) B.D.Jacks. (W.A.) * '' Calytrix praecipua'' Craven (W.A.) * '' Calytrix pulchella'' (Turcz.) B.D.Jacks. (W.A.) * '' Calytrix purpurea'' (F.Muell.) Craven (W.A.) * '' Calytrix retrorsifolia'' Nge & Keighery (W.A.) * '' Calytrix rupestris'' Craven (N.T.) * '' Calytrix sagei'' Rye (W.A.) * '' Calytrix sapphirina'' Lindl. (W.A.) * '' Calytrix similis'' Craven (W.A.) * '' Calytrix simplex'' Lindl. (W.A.) * '' Calytrix smeatoniana'' (F.Muell.) Craven (S.A.) * '' Calytrix strigosa'' A.Cunn. (W.A.) * '' Calytrix superba'' C.A.Gardner & A.S.George - superb starflower (W.A.) * '' Calytrix surdiviperana'' Craven (N.T.) * '' Calytrix sylvana'' Craven (W.A.) * '' Calytrix tenuiramea'' (Turcz.) Benth. (W.A.) * '' Calytrix tetragona'' Labill. - common fringe-myrtle (W.A., S.A., Qld., N.S.W., A.C.T., Vic., Tas.) * '' Calytrix truncatifolia'' Craven (W.A.) * '' Calytrix uncinata'' Craven (W.A.) * '' Calytrix variabilis'' Lindl. (W.A.) * '' Calytrix verruculosa'' Craven (W.A.) * '' Calytrix verticillata'' Craven (N.T.) * '' Calytrix violacea'' (Lindl.) Craven (W.A.) * '' Calytrix viscida'' Rye (W.A.) * '' Calytrix warburtonensis'' Craven (W.A.) * '' Calytrix watsonii'' (F.Muell. & Tate) C.A.Gardner (W.A.)


References

{{Taxonbar, from=Q3112775 Myrtaceae genera Endemic flora of Australia Myrtales of Australia Taxa named by Jacques Labillardière