Assertion: hemlock's flower | /r/HasProperty | clustered in umbel
Facets:
Source sentences:
text: The tiny white flowers are clustered in an umbel (looks like an umbrella).
text: Its small white flowers, clustered in umbels, are a ½ inch in diameter.
text: Small white flowers are clustered in umbels 3-6 inches in diameter at the tips of the branches.