蕨類植物(Fern)生態解說@西溫哥華燈塔公園海岸原始森林

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Uploaded by on May 26, 2008

5月25日(星期日)下午三時, 林聖哲老師導覽:西溫哥華燈塔公園海岸原始森林生態解說。
類植物又名羊齒植物,是介於植物體無維管束分化的蘚苔植物和有維管束分化的種子植物之間的一群維管束植物。

其分類特徵較蘚苔植物進步、較種子植物原始,即是高等的孢子植物,又是低等的維管束植物。蕨類植物具有能獨立生活的孢子體和配子體而不同於其他的高等植物,孢子體有根、莖­、葉等三種器官的分化,葉部並著有孢子囊,其內產生孢子;由孢子傳播繁殖,發育成配子體而有藏卵器與藏精器,經精卵結合的受精卵形成幼胚,在配子體上繼續發育成長,繼而隨­著配子體的迅速衰亡而即刻長成子代的孢子體,如此完成明顯世代交替的生活史。

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