每日一樹-台灣穗花杉(Amentotaxus formosana Li)
台灣穗花杉:Amentotaxus formosana Li
分類地位: 松柏綱 Pinopsida、松柏目 Pinales、穗花杉科 Amentotaxaceae、穗花杉屬 Amentotaxus
台灣穗花杉為文化資產保存法評定的珍貴稀有物種之一,台灣穗花杉主要分布於小西氏楠-江某型,生長最適界為海拔 1,100 m 之中上坡,土壤含石率和林下覆蓋度均偏高。
Amentotaxus formosana Li has been declared as one of the rare species of Taiwan according to the Culture Heritage Preservation Law.Amentotaxus formosana are mainly found in Machilus konishii -
Schefflera octophylla type, and its optimum of the growth prefers mid to upper slope at an elevation of about 1100 m with higher stoniness of soil and herb layer coverage.
物種特性:中小型喬木,樹高10公尺,胸高直徑30至36公分,大枝稀疏,小枝斜展,樹形呈圓形或接近方型,雌雄異株,葉為鎌刀狀,長5至6公分,葉表面深綠色具光澤,葉背中脈兩側有二條寬約2公釐之白色氣孔帶,葉緣反捲。雄花序呈3至5穗狀生長於小枝頂端,長3公分,無梗,花蕊具5-8個花葯;雌花單生於葉腋,呈球形,有長梗,一芽四至六朵;於每年4月初長出新芽並同時開花,雌花授粉後發育成幼種實,呈橢圓形或倒卵狀,長2至2.5公分,至隔年2月成長不明顯,直到4月左右逐漸發育成熟且假種皮漸轉暗紅色,於5至6月間成熟落果,與紅豆杉屬最大不同就是其雄毬果兩兩對生,形成穗狀花序,而非單生雄毬果。屬於中下層耐陰樹種,喜生於溪谷或較為潮濕山坡及谷地,常與闊葉林混生。
A medium-sized or small tree up to 10m high and 30-36 cm in diameter, thinly branched . Leaves falcate 5-8.5cm long,7-8mm broad,with 2 broad white stomatic bands beneath.
Protected area:大武事業區台灣穗花杉自然保留區 Dawushan Nature Reserve
分類地位: 松柏綱 Pinopsida、松柏目 Pinales、穗花杉科 Amentotaxaceae、穗花杉屬 Amentotaxus
台灣穗花杉為文化資產保存法評定的珍貴稀有物種之一,台灣穗花杉主要分布於小西氏楠-江某型,生長最適界為海拔 1,100 m 之中上坡,土壤含石率和林下覆蓋度均偏高。
Amentotaxus formosana Li has been declared as one of the rare species of Taiwan according to the Culture Heritage Preservation Law.Amentotaxus formosana are mainly found in Machilus konishii -
Schefflera octophylla type, and its optimum of the growth prefers mid to upper slope at an elevation of about 1100 m with higher stoniness of soil and herb layer coverage.
物種特性:中小型喬木,樹高10公尺,胸高直徑30至36公分,大枝稀疏,小枝斜展,樹形呈圓形或接近方型,雌雄異株,葉為鎌刀狀,長5至6公分,葉表面深綠色具光澤,葉背中脈兩側有二條寬約2公釐之白色氣孔帶,葉緣反捲。雄花序呈3至5穗狀生長於小枝頂端,長3公分,無梗,花蕊具5-8個花葯;雌花單生於葉腋,呈球形,有長梗,一芽四至六朵;於每年4月初長出新芽並同時開花,雌花授粉後發育成幼種實,呈橢圓形或倒卵狀,長2至2.5公分,至隔年2月成長不明顯,直到4月左右逐漸發育成熟且假種皮漸轉暗紅色,於5至6月間成熟落果,與紅豆杉屬最大不同就是其雄毬果兩兩對生,形成穗狀花序,而非單生雄毬果。屬於中下層耐陰樹種,喜生於溪谷或較為潮濕山坡及谷地,常與闊葉林混生。
A medium-sized or small tree up to 10m high and 30-36 cm in diameter, thinly branched . Leaves falcate 5-8.5cm long,7-8mm broad,with 2 broad white stomatic bands beneath.
Protected area:大武事業區台灣穗花杉自然保留區 Dawushan Nature Reserve
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