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''Callitris arenaria'' is a species of conifer in the cypress family, Cupressaceae. Its common names include sandplain cypress, Bruce cypress,〔Thomas, P. 2013. (''Actinostrobus arenarius''. ) The IUCN Red List of Threatened Species. Version 2014.3. Downloaded on 31 March 2015.〕 Bruce cypress-pine, and tamin.〔(''Actinostrobus arenarius''. ) The Gymnosperm Database.〕 It is endemic to Western Australia.〔 This species is a shrub or a tree growing up to 5 metres tall. It has spreading branches with small branchlets. The scale-like, gray-green leaves are up to 1.2 centimetres (0.5 in) long and grow in threes. The cylindrical male cones are up to half a centimeter long. The female cones are up to 2 centimetres long with pointed scales. They contain winged seeds.〔 Western Australian State Botanist Charles Gardner described the species in 1964, from a specimen collected at Tammin, Western Australia.〔 The species name is derived from the Latin word ''arena'' "sand", relating to where the sandplain cypress grows. 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 arenarius'' was renamed ''Callitris arenaria''.〔 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. 〕 This plant grows in colonies on sandplains, as part of a low scrubby plant community known as kwongan; associated plant species include proteaceae of the genus ''Banksia'' , ''Conospermum'', ''Grevillea'' and ''Hakea'', myrtaceae of the genus ''Melaleuca'', various ''Acacia'' species and the conifers ''Callitris preissii'' and ''C. roei''.〔 Some of its habitat has been degraded or destroyed, but the plant is still widespread and grows in several protected areas.〔 It is found from Lake Grace north to the Murchison River.〔 The Bruce cypress colonises disturbed areas, forming stands on road verges and areas cleared for agriculture.〔 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Callitris arenaria」の詳細全文を読む スポンサード リンク
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