Assertion: oak's acorn | /r/HasProperty | acorn caps
Facets:
Source sentences:
text: Acorns about 2 cm long, almost sessile or on an axillary stalk to 8 mm long; acorn caps hemispheric or shallowly cupped, 4 to 12 mm deep by 8 to 22 mm wide, enclosing from 1/4 to 1/2 of the nut.