Assertion: cattail's seed | /r/HasProperty | dark brown
Facets:
Source sentences:
text: The numerous seeds are dark brown to black, flat, kidney-shaped with an irregularly pitted surface, 3-4 mm long and 2-3 mm wide.
text: Seeds are dark brown, oval and very small.
text: Seeds are dark brown, ellipsoid and 0.6–0.9 mm long.