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・ Callitrichidae
・ Callitris
・ Callitris acuminata
・ Callitris arenaria
・ Callitris baileyi
・ Callitris canescens
・ Callitris columellaris
・ Callitris drummondii
・ Callitris endlicheri
・ Callitris macleayana
・ Callitris monticola
・ Callitris muelleri
・ Callitris neocaledonica
・ Callitris oblonga
・ Callitris preissii
Callitris pyramidalis
・ Callitris rhomboidea
・ Callitris roei
・ Callitris sulcata
・ Callitris verrucosa
・ Callitropsis
・ Callityrinthia mimetica
・ Calliurichthys
・ Callix Crabbe
・ Callixalus pictus
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・ Callixenus
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Callitris pyramidalis : ウィキペディア英語版
Callitris pyramidalis

''Callitris pyramidalis'', commonly known as swamp cypress, is a species of coniferous tree in the Cupressaceae (cypress family). Like the other species in the genus, it is endemic to southwestern Western Australia.
Swamp cypress is a shrub or small tree, reaching eight metres tall. The leaves are evergreen and scale-like, except on young seedlings, where they are needle-like. The leaves are arranged in six rows along the twigs, in alternating whorls of three. The male cones are small, 3–6 mm long, and are located at the tips of the twigs. The female cones start out similarly inconspicuous, but mature in 18–20 months to 1–2 cm with a rounded apex.
The cones open and release the seeds only upon drying. They tend to remain closed on the trees for many years, opening only if the branch, or the whole tree, dies. Bushfire kills swamp cypress, but it also causes a great many seeds to be released all at once, resulting in prolific regeneration. In one case, an isolated tree on Jeegarnyeejip Island was killed by fire, and the following winter there were 800 seedlings per square metre within a couple of metres of the original specimen, and about 150 per square metre ten metres away.
The species was first collected from Perth in September 1841 by Johann Preiss, and a description was published by Friedrich Anton Wilhelm Miquel in 1845 as ''Actinostrobus pyramidalis''. A 2010 study of the genera ''Actinostrobus'' and ''Callitris'' found that all three species of ''Actinostrobus'' lay within the current concept of ''Callitris'' based on analysis of 42 morphological and anatomical characters, hence ''Actinostrobus pyramidalis'' was renamed ''Callitris pyramidalis''.〔 Piggin, J., and Bruhl, J.J. (2010). () Phylogeny reconstruction of ''Callitris'' Vent. (Cupressaceae) and its allies leads to inclusion of ''Actinostrobus'' within ''Callitris''. ''Australian Systematic Botany'' 23: 69-93. 〕
==References and external links==

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*Farjon, A. (2005). ''Monograph of Cupressaceae and Sciadopitys''. Royal Botanic Gardens, Kew. ISBN 1-84246-068-4.
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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