pennyroyal

• 指一种欧亚多年生薄荷，花小、淡紫蓝色，叶卵形，可提取芳香油；也指一种直立、被毛、分枝的美洲植物，花紫蓝色，可提取精油，用作驱虫剂并有时用于民间医药。

A noun referring to either a Eurasian perennial mint with small lilac-blue flowers and ovate leaves that yields an aromatic oil, or an erect hairy branching American herb with purple-blue flowers that yields an essential oil used as an insect repellent and sometimes in folk medicine.

1. Eurasian PennyroyalC1formalscientific

   A perennial mint plant native to Eurasia, with small lilac-blue flowers and ovate leaves, yielding a strong aromatic oil.

   欧亚薄荷

   • The Eurasian pennyroyal is often found in damp, grassy areas.
   • Its oil has been used historically in herbal remedies.
   • The plant's small lilac flowers bloom in late summer.

2. American PennyroyalC1formalamericanscientific

   An erect, hairy, branching herb native to North America, with purple-blue flowers, yielding an essential oil used as an insect repellent and in folk medicine.

   美洲薄荷

   • American pennyroyal is commonly used as a natural mosquito repellent.
   • The plant's essential oil is extracted from its leaves.
   • In folk medicine, it was sometimes used to treat colds.

   同义词tickweed