Assertion: yam's stem | /r/CapableOf | feature 5-7 sunken veins
Facets:
value: conspicuously
type: MANNER
Source sentences:
text: Quadrangular purplish-winged stems (to 30’ or more) are clad with long-petioled, broad-ovate, bright green leaves (to 6-8” long) featuring 5-7 conspicuously sunken veins and cordate to arrowhead-shaped bases.