CLASSIFICATION OF PLANT ABNORMALITIES 335 



speak of Diaphysis floriparous; if leafy shoots arise, it is Diaphysis 

 frondiparous; if a cluster of flowers, it is known as Diaphysis 

 racemiparous. 



Diplasy (Fermond). — The division of an axial organ into two 

 parts. 



Diremption. — The occasional separation, or displacement of leaves. 



Diruption. — A term used by Germain de St. Pierre for different 

 appearances (division of leaves, axes, fasciation). 



Discentration (C. Schimper). — A term applied to fasciation of an 

 axial organ, but used occasionally for the multiple division of a 

 phyllome. 



Displacement (Masters). — The abnormal position of a plant organ. 



Distrophy (Re).- — The dissimilar formation of the homologous 

 organs of a plant. 



Divulsion (St. Germain de Pierre). — See diruption. 



Ecblastesis (Engelmann). — Lateral proliferation, that is bud for- 

 mation in the axils of flower parts (sepals, petals, stamens or carpels). 

 There can be distinguished floriparous, frondiparous and racemiparous 

 kinds of ecblastesis. 



Enation. — The formation of excrescences of different kinds on the 

 Upper surface of other organs. We find scales projecting from petals, 

 small lamina on foliage, leaves, etc. 



Epanody (Ch. Morren). — Abnormal reversion of an organ to a 

 simpler form than it normally shows. 



Epipedochorisis (Fermond). — A manifold division of an axial 

 organ in one plane. Frequently not distinguishable from fasciation. 



Epistrophy (Ch. Morren). — A reversion of an apparently constant 

 monstrosity to the normal form of single organs, for example, the 

 development of branches with normal leaves in place of those with cleft 

 leaves. 



Etiolated. — Blanched, or lengthened abnormally by the absence of 

 light. 



Expansivity. — ^A term used by Germain de St. Pierre with a similar 

 sense to Diruption and Divulsion. 



Fasciation (Olaus Borrich, 1671).- — A flat band-like, or ribbon-like 

 expansion of a normal cylindric axis, or stem, associated with departure 

 from the normal leaf position. If flowers are developed they are 

 generally altered in structure (Fig. 133). 



