Assertion: fern's leaflet | /r/CapableOf | subdivide into further leaflets
Facets:
Source sentences:
text: Hard fern is singly pinnate, as each frond has only one series of leaflets on it, whereas many ferns are bi-pinnate, with each leaflet subdivided again into further leaflets, and bracken (Pteridium aquilinum) is tri-pinnate, with each leaflet subdividing three times.