名詞 bedstraw:

1. any of several plants of the genus Galium

bed.straw

n.（名詞）
Any of several weedy or ornamental plants of the genusGalium, having whorled leaves, clusters of small white or yellow flowers, and prickly stems. Also called cleavers
豬殃殃：一種草本或裝飾性植物豬殃殃屬 ，有環(huán)生葉、簇狀白色或黃色小花和帶刺的莖 也作 cleavers

來源：
Short for Our Lady`s Bedstraw [name for a plant of the genus] Galium, whose foliage was used to stuff mattresses in medieval times
Our Lady`s Bedstraw的簡寫 [] 豬殃殃屬 植物的名字，中世紀時，其葉子用作添充床墊