Enation

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Enation

 

a scale that is an outgrowth from the surface of the leaf petioles of certain ferns. The formation of enations is similar to the development of small leaves in certain types of higher plants (for example, club mosses) in the process of evolution. Such leaves were formed as flattened photosynthesizing outgrowths of the stem cortex.

References in periodicals archive ?
They are of two kinds, fertile, composed of a vascularized stalk and its terminal sporangium, and vegetative, or sterile, termed "phylloids " (this word is used in a different sense from that of Lignier who applied it to enations, or emergences).
arboreum genotype Ravi were started as slight vein swelling/darkening; some of these were later developed into enations (Fig.
Assessment of CLCuD incidence in F1 and F2 generations: Incidence of CLCuD was assessed by visual observation on typical symptoms like vein clearing, vein swelling, leaf curling and leaf enations in F1 and F2 generations of NIBGE-115 x Transgenic Coker-312, MNH-770 x Transgenic Coker-312, MNH-786 x Transgenic Coker-312, CIM-496 x Transgenic Coker-312 and FH-1000 x Transgenic Coker-312.