Assertion: cardoon's stem | /r/HasProperty | ribbed
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Cactus stems are often ribbed or fluted, which allows them to expand and contract easily for quick water absorption after rain, followed by long drought periods.
text: The stem may also be ribbed or fluted in shape.
text: Stems are usually not divided into segments, and are ribbed or tuberculate.