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In a vascular plant, the stele is the central part of the root or stem [1] containing the tissues derived from the procambium. These include vascular tissue, in some cases ground tissue and a pericycle, which, if present, defines the outermost boundary of the stele.
Pteridophytes (ferns and lycophytes) are free-sporing vascular plants that have a life cycle with alternating, free-living gametophyte and sporophyte phases that are independent at maturity. The body of the sporophyte is well differentiated into roots, stem and leaves. The root system is always adventitious. The stem is either underground or ...
A pioneering system of plant taxonomy, Linnaeus's Systema Naturae, Leiden, 1735 This list of systems of plant taxonomy presents "taxonomic systems" used in plant classification. A taxonomic system is a coherent whole of taxonomic judgments on circumscription and placement of the considered taxa.
A system of taxonomy of the cryptogams, ... Bryophytes and pteridophytes. 2nd ed. McGraw-Hill, New York. ... This page was last edited on 7 May 2023, ...
In 2014, Christenhusz and Chase grouped all the fern subclasses together as Polypodiophyta [3] and in 2016 the Pteridophyte Phylogeny Group (PPG) adopted the class Polypodiopsida sensu lato for the four fern subclasses. The following cladogram shows the phylogenic relationship between the subclasses according to the PPG.
The forking of the bundle system starts near the base of a terminal cone, which remains erect, of the sympodial development in certain branches. The last method is when "adventitious buds appear in the cortical tissue closely connected with the stelar system of the trunk, and these buds continue their development like typical stems".
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The Cyatheaceae are a family of ferns, the scaly tree ferns, one of eight families in the order Cyatheales in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). [1] Alternatively, the family may defined much more broadly (Cyatheaceae sensu lato ) as the only family in the Cyatheales, with the PPG I family treated as the subfamily ...