leaf gap


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leaf gap

the region of the vascular cylinder above the LEAF TRACE where PARENCHYMA occurs. Leaf gaps are characteristic of ferns, gymnosperms and flowering plants.
References in periodicals archive ?
Stele with leaf gaps in xylem: 0 = absent; 1 = present.
Stele with leaf gaps in phloem: 0 = absent; 1 = present.
The polycyclic steles are divided into many wedges by the presence of large leaf gaps. The secondary xylem has scalariform or pitted (biseriate-triseriate) tracheids.