sandbur

or sand·burr

[ sand-bur ]
/ ˈsændˌbɜr /

noun

any of various grasses of the genus Cenchrus, having spikelets enclosed in prickly burs.
any of several bur-bearing weeds growing in sandy places, as Franseria acanthicarpa or Solanum rostratum, of the western U.S.

Origin of sandbur

An Americanism dating back to 1820–30; sand + bur1