簇

cù
  1. (bound form) to cluster; to pile up
  2. cluster; pile
  3. classifier for bunches, clusters, piles etc

CEDICT

Classifier for

花 huā
  1. flower
  2. blossom
  3. fancy pattern
  4. florid
  5. to spend (money, time)
  6. (coll.) lecherous
  7. lustful

classifiers: 朵, 支, 束, 把, 盆, 簇