338 GENERAL PLANT PATHOLOGY 



Phyllomania. — An abnormal production of green leaves. 



Pistillody — The transformation of floral parts into carpels. 



Pleiomorphy (Masters). — An abnormal or excessive development. 



Pleiophylly (Masters). — The appearance of many leaves in place of 

 a single part. 



Pleiotaxy (Masters). — The increase in the number of whorls in a 

 flower. 



Plesiasmy (Fermond). — ^An abnormal shortening of the stem inter- 

 nodes, so that the leaves are arranged closely together. 



Pollaplasy (Fermond). — The division of a theoretic simple organ 

 into many analogous structures. 



Potyclady. — An unusual development of branches and twigs. 



Polyphylly. — The abnormal increase in the number of parts of the 

 floral whorls. 



Prolification. — This term is used with a number of different 

 meanings. One is the central, or lateral, outgrowth from a flower, or 

 an inflorescence. The different kinds are designated as median, axil- 

 lary, extrafloral, while each kind is again divided into foliar and floral, 

 depending upon the nature of the adventitious bud. The axillary 

 prolification is known as ecblastesis (Engelmann) and the median as 

 diaphysis. 



Rachitisni (Touchy). — Hypertrophy of the floral envelopes, as in 



JUNCACEJE, CvPERACEiE, GrAMINACE^. 



Recrudescence. — The production of a leafy, or flowering, shoot from 

 an axis of inflorescence after the formation of ripe fruit on that axis. 



Rhizocallesy (Ch. Morren). — The union of two plants of the same 

 species solely by their roots. 



Salpinganthy (Ch. Morren). — The transformation of ligulate or 

 ray florets of Compositae into conspicuous tubular florets. 



Scyphogeny (Ch. Morren). — The formation of ascidia from leaf 

 blades. 



Sepalody. — The transformation of petals into sepals, or sepaloid 

 parts. 



Solenoidy. (Ch Morren). — The metamorphosis of stamens into 

 tubular structures. 



Solution (Masters). — Abnormal separation of the members of a 

 whorl from those of another (similar to the Adesmia heterologous of 

 Morren). 



