Assertion: sweet flag's leaf | /r/HasProperty | erect
Facets:
value: with pink sheathing at their bases
type: LOCATION
Source sentences:
text: The leaves are erect yellowish-brown, radical, with pink sheathing at their bases, sword-shaped, flat and narrow, tapering into a long, acute point, and have parallel veins.
text: Each stalk produces one or more small alternate leaves that are erect and sword-like.