| 词条 | Calothamnus gracilis |
| 释义 |
|image = |image_caption = |genus = Calothamnus |species = gracilis |authority = R.Br. |synonyms =Melaleuca gracilis (R.Br.) Craven & R.D.Edwards }}Calothamnus gracilis is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a spreading shrub with upright foliage, common in heath within its range. It has long, thin leaves and produces dark red flowers at different times of the year, depending partly on rainfall. It is similar to Calothamnus gibbosus but lacks the corky bark on the older branches of that species and its flowers and fruit are not as deeply embedded in the bark. (In 2014 Craven, Edwards and Cowley proposed that the species be renamed Melaleuca gracilis.)[1] DescriptionCalothamnus gracilis is a spreading shrub growing to a height of about {{convert|1.5|m|ft|sigfig=2}}. Its leaves are fine, circular in cross section and up to {{convert|80|mm|in|sigfig=1}} long tapering to a sharp point but because the leaves are so long, the plant is not prickly.[2][3]The flowers are bright red and arranged in small groups mostly on one side of the stems. The flower spikes are up to {{convert|80|mm|in|sigfig=1}} long and there are 5 sepals, petals and clawlike stamen bundles.[2][3] Taxonomy and namingCalothamnus gracilis was first formally described by Robert Brown in 1812 in William Aiton's Hortus Kewensis.[4][5] The specific epithet (gracilis) is a Latin word meaning "slender", "slim" or "thin",[6] possibly referring to the thin branches of this species compared to those of the otherwise similar Calothamnus gibbosus.[7]Distribution and habitatCalothamnus gracilis is widespread and common in the south of south-western Western Australia in the area between Albany and Esperance including in the Avon Wheatbelt, Coolgardie, Esperance Plains, Jarrah Forest, Mallee and Warren biogeographic regions.[8] It grows in sandy and gravelly soils in heath.[2]EcologyCalothamnus gracilis is an important food source for the tiny Honey possum (Tarsipes rostratus). Research has been performed to evaluate the role of this possum in the spread of the plant pathogen, Phytophthora cinnamomi.[9][10]ConservationCalothamnus gracilis is classified as "not threatened" by the Western Australian government department of parks and wildlife.[8]References1. ^{{cite journal|last1=Craven|first1=Lyn A.|last2=Edwards|first2=Robert D.|last3=Cowley|first3=Kirsten J.|title=New combinations and names in Melaleuca (Myrtaceae)|journal=Taxon|date=30 June 2014|volume=63|issue=3|page=666|doi=10.12705/633.38|url=http://www.ingentaconnect.com/content/iapt/tax/2014/00000063/00000003/art00017|accessdate=23 July 2015}} {{Taxonbar|from=Q15395424}}2. ^1 2 {{cite web|last1=Archer|first1=William|title=Calothamnus gracilis|url=http://esperancewildflowers.blogspot.com.au/2009/07/calothamnus-gracilis-myrtaceae.html|publisher=Esperance Wildflowers|accessdate=28 July 2015}} 3. ^1 {{cite book|last1=Wrigley|first1=John W.|last2=Fagg|first2=Murray|title=Australian native plants : a manual for their propagation, cultivation and use in landscaping|date=1983|publisher=Collins|location=Sydney|isbn=0002165759|page=194|edition=2nd}} 4. ^{{cite web|title=Calothamnus gracilis|url=https://biodiversity.org.au/boa/instance/apni/527125|publisher=APNI|accessdate=28 July 2015}} 5. ^{{cite book|last1=Brown|first1=Robert|title=William Aiton's Hortus Kewensis (Volume 4)|date=1812|publisher=Longman, Hurst, Rees, Orme and Brown|location=London|page=418|edition=2|url=http://bibdigital.rjb.csic.es/ing/Libro.php?Libro=3050|accessdate=28 July 2015}} 6. ^{{cite web|title=gracilis|url=https://en.wiktionary.org/wiki/gracilis|publisher=Wiktionary|accessdate=28 July 2015}} 7. ^{{cite web|last1=Archer|first1=William|title=Calothamnus gibbosus|url=http://esperancewildflowers.blogspot.com.au/2012/02/calothamnus-gibbosus-corky-net-bush.html|publisher=Esperance Wildflowers|accessdate=28 July 2015}} 8. ^1 {{FloraBase|name=Calothamnus gracilis |id=5409 }} 9. ^{{cite journal|last1=Dundas|first1=Shannon J.|last2=Fleming|first2=Patricia A.|last3=Hardy|first3=Giles E. St J.|title=Flower visitation by honey possums (Tarsipes rostratus) in a coastal banksia heathland infested with the plant pathogen Phytophthora cinnamomi|journal=Australian Mammalogy|date=2013|volume=35|issue=2|pages=166–174|doi=10.1071/AM12044|url=http://www.publish.csiro.au/paper/AM12044.htm|accessdate=28 July 2015}} 10. ^{{cite web|last1=Dundas|first1=Shannon|last2=Fleming|first2=Trish|last3=Hardy|first3=Giles|title=Honey possum diets in banksia heathland infested with Phytophthora cinnamomi|url=http://researchrepository.murdoch.edu.au/14754/1/honey_possum_diets.pdf|publisher=Murdoch University|accessdate=7 December 2015}} 6 : Calothamnus|Endemic flora of Western Australia|Myrtales of Australia|Flora of Western Australia|Plants described in 1812|Taxa named by Robert Brown |
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