Assertion: fern's leaf | /r/CapableOf | attach to the stem
Facets:
Source sentences:
text: The action potential then passes into the petiole, and finally to the large pulvinus at the end of the petiole, where the leaf attaches to the stem.
text: Where a fern leaf is attached to a stem, a part of the vascular tissue of the stem goes into it (a leaf trace), making a slight gap, filled by parenchyma cells (generalized plant cells), in the vascular cylinder.