Assertion: xylem's cell | /r/CapableOf | mature after elongation
Facets:
Source sentences:
text: Primary phloem is formed by the apical meristems (zones of new cell production) of root and shoot tips; it may be either protophloem, the cells of which are matured before elongation (during growth) of the area in which it lies, or metaphloem, the cells of which mature after elongation.