这株灌木名叫老鼠勒(Acanthus spp.)，洋文又叫Sea Holly海冬青，因为锯齿状的叶片很像圣诞节的装饰Christmas holly冬青。老鼠勒叶片表面有盐腺，可以排除盐分，因此通常可以在叶面上观察到白色盐粒。Sea Holly and Christmas holly both have prickly green leaves. Sea holly lives in the mangrove forest and excretes extra salt by the leaves. Some guides encourage visitors to touch the white crystalline layer on the leaves and to lick the finger to feel the salt.
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