1. 芹叶钩吻：poison gas 毒气 | poison hemlock 芹叶钩吻 | poison ivy 毒葛
2. 钩吻叶芹：poison gland ==> 毒腺 | poison hemlock ==> 钩吻叶芹 | poison insecticide ==> 杀虫毒剂
noun
1. large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers
usually found in damp habitats
all parts extremely poisonous
Synonym: hemlock poison parsley California fern Nebraska fern winter fern Conium maculatum