Nettle
a well-known plant covered with minute sharp hairs; containing a poison that produces a painful, stifling sensation. It grows on neglected ground. A different Hebrew word in Job 30:7; Pr 24:31; Zep 2:9 seems to indicate a different species.
Bibliography Information Smith, William, Dr "Definition for 'Nettle' Smiths Bible Dictionary". bible-history.com - Smiths; 1901.