Assertion: aster's flower head | /r/HasProperty | flat
Facets:
Source sentences:
text: White, becoming lilac or rosy colored with age; flower heads are flat or round-topped; petals 8 to 15 mm in length.
text: : White, becoming lilac or rosy colored with age; flower heads are flat or round-topped; petals 8 to 15 mm in length.