澳洲杉(Araucariaheterophyll)
澳洲杉常綠喬木;樹冠尖塔形,深綠色,樹冠表皮常橫裂或呈條片狀脫落;新表皮具古銅色光澤。澳洲杉莖幹直立,側枝輪生,水平伸展。小枝二列互生,水平延伸或略下垂。葉有二型:幼樹或側枝上的葉為鉆形,向上彎曲,長約12厘米,排列疏松,光綠色;大樹或老枝上的葉卵形或三角狀卵形,長約6厘米,排列緊密;球果近圓形。
澳洲杉喜溫暖、潮濕的環境,在陽光充足的地方生長良好,有一定的耐陰力,但要避免夏季強光曝曬。不耐寒冷和幹旱,適合於排水良好富含腐殖質的微酸性砂質壤土。原產大洋洲東南沿海地區,如澳大利亞北部,現廣東等省均有引種栽培,中國北方部分城市於2002年開始引入澳洲杉盆景。
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