夜来香在夜间停止光合作用，排出大量废气，长期将其摆放在客厅或卧室内，会引这人头昏、罗附，甚主天眠。郁金香花中含有毒碱。人在这种花丛中呆上两小时就会头昏脑涨，出现中毒症状，严重者可有毛发脱落。夹竹桃它的茎、叶乃至花朵都有毒。它分泌的乳白色汁液含有一种夹竹桃 Night camel to stop photosynthesis at night, emit a lot of exhaust, long-term placed in the living room or bedroom, it will lead to dizziness, Luo attached, very sleep. Tulip flowers contain caustic soda. People spend two hours in this kind of flowers will be dizzy, symptoms of poisoning, severe hair loss may have. Oleander its stems, leaves and even flowers are poisonous. It secrete milky juice contains a kind of oleander