Thorny

a.
  1. Full of thorns or spines; rough with thorns; spiny; as, a thorny wood; a thorny tree; a thorny crown.
  2. Like a thorn or thorns; hence, figuratively, troublesome; vexatious; harassing; perplexing.
    3. Thorny rest-harrow (Bot.),
    rest-harrow.
    Thorny trefoil ,
    a prickly plant of the genus Fagonia (Fagonia Cretica, etc.).