Assertion: comfrey's leaf | /r/HasProperty | oval
Facets:
Source sentences:
text: Mature leaves are thick, leathery, broad and oval, up to 12 inches long, and have 3 or more prominent veins running parallel to the leaf edge.
text: The leaves are oval, lance shaped, tapered, the upper leaves narrowing into a winged leaf stalk running down to the far end of the stalk.