Premium
ON RHIZOCLADS IN THE OAK FERN, QUERCIFILIX ZEILANICA
Author(s) -
Bierhorst David W.
Publication year - 1985
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1985.tb08365.x
Subject(s) - biology , rhizome , apex (geometry) , fern , botany , tracheid , meristem , apical cell , shoot , root (linguistics) , xylem , cell , linguistics , philosophy , genetics
Stem branches in Quercifilix arise in the axils of roots at their attachment to the parent rhizome or apically upon a new root before it has erupted from the tissues of the rhizome. In either case, they arise from the surface cells of the accessory calyptra. When the new stem arises apically, the root apex and the root cap give rise to a continuous core of procambium. The apical cell of the root becomes a tracheid, more or less retaining its original shape. The root‐shoot axis thus produced is referred to as a rhizoclad.