水葫蘆和狗尾草的區別
水葫蘆: 浮水植物。根生於節上,根係發達,靠毛根吸收養分,主根(肉根)分蘖下一代。葉單生,直立,葉片卵形至腎圓形,頂端微凹,光滑;葉柄處有泡囊承擔葉花的重量,懸浮於水麵生長。須根發達且懸垂水中。單葉叢生於短縮莖的基部,每株6-12葉片,葉卵圓形,葉麵光滑;葉柄中下部有膨脹如葫蘆狀的氣囊基部具削狀苞片。

狗尾草為禾本科一年生草本植物,高30~100cm。稈疏叢生,直立或基部膝曲上升。葉片條狀披針形,葉鞘鬆弛,光滑,鞘口有毛,葉舌毛狀。

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