bedstraw

noun

1. (countable, uncountable)any plant of herb genus Galium of the madder family with small pointed leaves and hairy stems with small, white or yellow flowers
2. (countable, uncountable)Any plant of the genus Cruciata.
3. (countable, obsolete, uncountable)straw put into a bed

   “Fleas breed principally of straw or mats, where there hath been a little moisture; or the chamber and bedstraw kept close and not aired”