undergrove

From under- +‎ grove.

• Audio (US):

  (file)

undergrove (plural undergroves)

1. (poetic) A grove of shrubs or low trees under taller ones.
   • 1815, William Wordsworth, A whirl-blast:

     I sat within an undergrove
     Of tallest hollies, tall and green;
     A fairer bower was never seen.