Sonnet. "Thou poisonous laurel leaf, that in the soil"

Thou poisonous laurel leaf, that in the soil
  Of life, which I am doomed to till full sore,
  Spring'st like a noisome weed! I do not toil
  For thee, and yet thou still com'st darkening o'er
  My plot of earth with thy unwelcome shade.
  Thou nightshade of the heart, beneath whose boughs
  All fair and gentle buds hang withering,
  Why hast thou wreathed thyself around my brows,
  Casting from thence the blossoms of my spring,
  Breathing on youth's sweet roses till they fade?
  Alas! thou art an evil weed of woe,
  Watered with tears and watched with sleepless care,
  Seldom doth envy thy green glories spare;
  And yet men covet thee—ah, wherefore do they so!