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'''''Regelia''''' is a [[genus (biology)|genus]] of [[flowering plant]]s in the family [[Myrtaceae]]. This genus is composed of six [[species]] of small leaved, [[evergreen]] shrubs and trees that are [[endemism|endemic]] to [[Australia]]. Five of the six species are endemic to the south-west of [[Western Australia]]. The sixth species that has been assigned to this genus (''R. punicea'') is endemic to [[Kakadu National Park]] in the [[Northern Territory]] and is now considered to belong to a new separate genus, ''Petraeomyrtus''. Regelia species range from 1 to 6 meters in height.<ref name=florabase>[http://florabase.dec.wa.gov.au/browse/profile/21844 Regelia] Florabase: The Western Australian Flora (ID 21844)</ref> They are noted for bearing essential oils.<ref name=florabase></ref> Typically showy blooms are aggregate inflorescences which take the form of heads or spikes depending upon the species. Fruits are a woody, 3-valved capsule which often split upon maturity.
'''''Regelia''''' is a [[genus (biology)|genus]] of [[flowering plant]]s in the family [[Myrtaceae]]. This genus is composed of six [[species]] of small leaved, [[evergreen]] shrubs and trees that are [[endemism|endemic]] to [[Australia]]. Five of the six species are endemic to the south-west of [[Western Australia]]. The sixth species that has been assigned to this genus (''R. punicea'') is endemic to [[Kakadu National Park]] in the [[Northern Territory]] and is now considered to belong to a new separate genus, ''Petraeomyrtus''. Regelia species range from 1 to 6 meters in height.<ref name=florabase>[http://florabase.dec.wa.gov.au/browse/profile/21844 Regelia] Florabase: The Western Australian Flora (ID 21844)</ref> They are noted for bearing essential oils.<ref name=florabase></ref> Typically showy blooms are aggregate inflorescences which take the form of heads or spikes depending upon the species. Fruits are a woody, 3-valved capsule which often split upon maturity.


==Etomology and taxonomy==
==Etymology and taxonomy==
The genus was first formally described by [[Johannes Conrad Schauer|J.C.Schauer]] in 1843 who gave it the name ''Regelia'' in honour of [[Germany|German]] gardener and [[botanist]] [[Eduard August von Regel]].<ref name=florabase></ref>
The genus was first formally described by [[Johannes Conrad Schauer|J.C.Schauer]] in 1843 who gave it the name ''Regelia'' in honour of [[Germany|German]] gardener and [[botanist]] [[Eduard August von Regel]].<ref name=florabase></ref>


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There are currently six recognized species of ''Regelia''. All are endemic to small geographic regions in southwestern or north-central Australia.
There are currently six recognized species of ''Regelia''. All are endemic to small geographic regions in southwestern or north-central Australia.


*''[[Regelia ciliata]]'' <small>Schauer</small> is a rigid spreading [[shrub]] which grows 1.3 m to 1.5 m across, it has with tiny wedge shaped leaves, and paper-like bark on the stems.<ref>[http://www.anbg.gov.au/gnp/gnp14/regelia-ciliata.html Regelia ciliata] Australians National Botanic Gardens, Australian Governmant.</ref>
*''[[Regelia ciliata]]'' <small>Schauer</small> is a rigid spreading [[shrub]] which grows 1.3 m to 1.5 m across. It has tiny wedge shaped leaves, and paper-like bark on the stems.<ref>[http://www.anbg.gov.au/gnp/gnp14/regelia-ciliata.html Regelia ciliata] Australians National Botanic Gardens, Australian Governmant.</ref>
* ''[[Regelia cymbifolia]]'' <small>(Diels) C.A.Gardner</small> is a much branched, upright shrub of about 2 meters in height, and bearing tiny wedge shaped leaves. It blooms in the spring, producing clusters of many small heads.
* ''[[Regelia cymbifolia]]'' <small>(Diels) C.A.Gardner</small> is a much branched, upright shrub of about 2 meters in height, and bearing tiny wedge shaped leaves. It blooms in the spring, producing clusters of many small heads.
*''[[Regelia inops]]'' <small>(Schauer) Schauer</small> is an upright but often spreading shrub which can grow to 0.75–2.5 m and has tiny wedge shaped leaves.<ref>[http://florabase.dec.wa.gov.au/browse/profile/6014 R. inops] FloraBase: The Western Australian Flora.</ref>
*''[[Regelia inops]]'' <small>(Schauer) Schauer</small> is an upright but often spreading shrub which can grow to 0.75–2.5 m and has tiny wedge shaped leaves.<ref>[http://florabase.dec.wa.gov.au/browse/profile/6014 R. inops] FloraBase: The Western Australian Flora.</ref>
* ''[[Regelia megacephala]]'' <small>C.A.Gardner</small> is a rare, 2-5 meter tall shrub, which has larger (but still small) rounded leaves.<ref>[http://florabase.dec.wa.gov.au/browse/profile/6015 R. megacephala] FloraBase: The Western Australian Flora.</ref>
* ''[[Regelia megacephala]]'' <small>C.A.Gardner</small> is a rare, 2-5 meter tall shrub, which has larger (but still small) rounded leaves.<ref>[http://florabase.dec.wa.gov.au/browse/profile/6015 R. megacephala] FloraBase: The Western Australian Flora.</ref>
* ''[[Regelia velutina]]'' <small>(Turcz.) C.A.Gardner</small> (Barrens regelia) is the showiest and largest member of the genus. It is a large shrub or small [[tree]] which can grow up to 6 meters. It is noted for growing on very poor dry soils and having large flower heads.<ref>[http://florabase.dec.wa.gov.au/browse/profile/6016 R. velutina] FloraBase: The Western Australian Flora.</ref>
* ''[[Regelia velutina]]'' <small>(Turcz.) C.A.Gardner</small> (Barrens regelia) is the showiest and largest member of the genus. It is a large shrub or small [[tree]] which can grow up to 6 meters. It is noted for growing on very poor dry soils and having large flower heads.<ref>[http://florabase.dec.wa.gov.au/browse/profile/6016 R. velutina] FloraBase: The Western Australian Flora.</ref>
* ''[[Regelia punicea]]'' <small>(N.Byrnes) Barlow</small> is found in the Northern Territory. This species was reassigned from genus ''Melaleuca'' in 1986 <ref>[http://www.publish.csiro.au/paper/BRU9860089.htm Regelia punicea (N.Byrnes) Barlow, comb.nov. (Myrtaceae) from the Northern Territory: Phytogeographic implications.] Barlow, BA. 1986, in Brunonia 9(1) 89 - 97. Australian Systematic Botany.</ref> but subsequently was proposed as a member of a new separate genus, ''[[Petraeomyrtus]]'',<ref>[http://www.publish.csiro.au/paper/SB98018.htm Generic position of Melaleuca punicea: Petraeomyrtus, gen. nov. (Myrtaceae)], Craven, LA. 1999, in ''Australian Systematic Botany'' 12(5) 675 - 678</ref> within which its species name is ''[[Petraeomyrtus punicea]]'' <small>(Byrnes) Craven</small>. <ref>[http://www.publish.csiro.au/paper/BT05133.htm Recruitment dynamics of the long-lived obligate seeders Callitris intratropica (Cupressaceae) and Petraeomyrtus punicea (Myrtaceae)], Russell-Smith, Jeremy. 2006, in ''Australian Journal of Botany'' 54(5) 479–485</ref>
* ''[[Regelia punicea]]'' <small>(N.Byrnes) Barlow</small> is found in the Northern Territory. This species was reassigned from genus ''Melaleuca'' in 1986 <ref>[http://www.publish.csiro.au/paper/BRU9860089.htm Regelia punicea (N.Byrnes) Barlow, comb.nov. (Myrtaceae) from the Northern Territory: Phytogeographic implications.] Barlow, BA. 1986, in Brunonia 9(1) 89 - 97. Australian Systematic Botany.</ref> but subsequently was proposed as a member of a new separate genus, ''[[Petraeomyrtus]]'',<ref>[http://www.publish.csiro.au/paper/SB98018.htm Generic position of Melaleuca punicea: Petraeomyrtus, gen. nov. (Myrtaceae)], Craven, LA. 1999, in ''Australian Systematic Botany'' 12(5) 675 - 678</ref> within which its species name is ''[[Petraeomyrtus punicea]]'' <small>(Byrnes) Craven</small>. <ref>[http://www.publish.csiro.au/paper/BT05133.htm Recruitment dynamics of the long-lived obligate seeders Callitris intratropica (Cupressaceae) and Petraeomyrtus punicea (Myrtaceae)], Russell-Smith, Jeremy. 2006, in ''Australian Journal of Botany'' 54(5) 479–485</ref>


Revision as of 23:35, 29 November 2008

Regelia
Regelia velutina in bloom.
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Rosids
Order:
Myrtales
Family:
Myrtaceae
Genus:
Regelia

Species

See text.

Regelia is a genus of flowering plants in the family Myrtaceae. This genus is composed of six species of small leaved, evergreen shrubs and trees that are endemic to Australia. Five of the six species are endemic to the south-west of Western Australia. The sixth species that has been assigned to this genus (R. punicea) is endemic to Kakadu National Park in the Northern Territory and is now considered to belong to a new separate genus, Petraeomyrtus. Regelia species range from 1 to 6 meters in height.[1] They are noted for bearing essential oils.[1] Typically showy blooms are aggregate inflorescences which take the form of heads or spikes depending upon the species. Fruits are a woody, 3-valved capsule which often split upon maturity.

Etymology and taxonomy

The genus was first formally described by J.C.Schauer in 1843 who gave it the name Regelia in honour of German gardener and botanist Eduard August von Regel.[1]

Regelia is closely related to Melaleuca; both have stamens which are fused into clusters. The primary difference between the genera is that in Regelia the anthers are attached at the base and in Melaleuca they are attached at the side.[2] These genera are also closely related to Beaufortia, Calothamnus and Eremaea.[2]

Species

There are currently six recognized species of Regelia. All are endemic to small geographic regions in southwestern or north-central Australia.

  • Regelia ciliata Schauer is a rigid spreading shrub which grows 1.3 m to 1.5 m across. It has tiny wedge shaped leaves, and paper-like bark on the stems.[3]
  • Regelia cymbifolia (Diels) C.A.Gardner is a much branched, upright shrub of about 2 meters in height, and bearing tiny wedge shaped leaves. It blooms in the spring, producing clusters of many small heads.
  • Regelia inops (Schauer) Schauer is an upright but often spreading shrub which can grow to 0.75–2.5 m and has tiny wedge shaped leaves.[4]
  • Regelia megacephala C.A.Gardner is a rare, 2-5 meter tall shrub, which has larger (but still small) rounded leaves.[5]
  • Regelia velutina (Turcz.) C.A.Gardner (Barrens regelia) is the showiest and largest member of the genus. It is a large shrub or small tree which can grow up to 6 meters. It is noted for growing on very poor dry soils and having large flower heads.[6]
  • Regelia punicea (N.Byrnes) Barlow is found in the Northern Territory. This species was reassigned from genus Melaleuca in 1986 [7] but subsequently was proposed as a member of a new separate genus, Petraeomyrtus,[8] within which its species name is Petraeomyrtus punicea (Byrnes) Craven. [9]

References

  1. ^ a b c Regelia Florabase: The Western Australian Flora (ID 21844)
  2. ^ a b Association of Societies for Growing Australian Plants (ASGAP): Regelia cymbifolia
  3. ^ Regelia ciliata Australians National Botanic Gardens, Australian Governmant.
  4. ^ R. inops FloraBase: The Western Australian Flora.
  5. ^ R. megacephala FloraBase: The Western Australian Flora.
  6. ^ R. velutina FloraBase: The Western Australian Flora.
  7. ^ Regelia punicea (N.Byrnes) Barlow, comb.nov. (Myrtaceae) from the Northern Territory: Phytogeographic implications. Barlow, BA. 1986, in Brunonia 9(1) 89 - 97. Australian Systematic Botany.
  8. ^ Generic position of Melaleuca punicea: Petraeomyrtus, gen. nov. (Myrtaceae), Craven, LA. 1999, in Australian Systematic Botany 12(5) 675 - 678
  9. ^ Recruitment dynamics of the long-lived obligate seeders Callitris intratropica (Cupressaceae) and Petraeomyrtus punicea (Myrtaceae), Russell-Smith, Jeremy. 2006, in Australian Journal of Botany 54(5) 479–485

External links

  • Australian National Botanic Gardens: Regelia velutina (photo)
  • "Regelia Schauer". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
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