Bedstraw \Bed"straw`\, n. 1. Straw put into a bed. --Bacon. [1913 Webster] 2. (Bot.) A genus of slender herbs, usually with square stems, whorled leaves, and small white flowers. [1913 Webster] {Our Lady's bedstraw}, which has yellow flowers, is {Galium verum}. {White bedstraw} is {Galium mollugo}. [1913 Webster]