叶刺 leaf spine
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叶刺 leaf spine 叶或叶的一部分变态所成的尖锐突起，称为叶刺。仙人掌（ Opuntia sp．）和日本小蘖（ Berberisthunbergii）的刺是叶片的变形物，刺槐（ Robiniapseudoacacia）和秦椒（ Zanthoxylum piperitum）的刺是托叶的变形物，特称为托叶刺，与根刺、茎刺、茎棘是相似的器官。
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