tea-of-heaven

[tee-uh v-hev-uh n]
noun
  1. a shrub, Hydrangea macrophylla serrata, of the saxifrage family, native to Japan and Korea, having hairy, ovate leaves and flat or slightly arched clusters of blue or white flowers.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018