4-2O Introduction to Botany. 



Prox'imal (L. proxitnus, nearest, next) : the part nearest the axis. 

 Pter'idophyte (Gr. pteris, pteridos, a kind of fern, from pteron, a feather; 



phyton, a plant) : ferns and their allies. 



Puber'ulent (L.puber, of ripe age, pubescent) : minutely hairy. 

 Pubes'cence : a covering of short soft hairs. 

 Pubes'cent (L. pubescens, reaching maturity, growing hairy) : covered with 



soft or downy hairs. 



Pul'vinate (L. pulvinus, a cushion) : having the form of a cushion or pad. 

 Pul'vinus : the motor organ at the base of some leaves and leaflets, as in 



scarlet runner. Figs. 59 and 60. 

 Punc'tate (L. punctum, a point) : marked with depressions, translucent 



glands, or colored spots. 

 Punctic'ulate : minutely punctate. 



Pun'gent (L. pungens, piercing) : ending in a sharp and rigid point. 

 Pus'tular (L. pustula, a pimple) : having blister-like elevations. 

 Pus'tulate : as though blistered. 

 Puta'men, pr. pew-ta'men (L. putamen, shells or peels) : the shell of a nut; 



the stone of a stone fruit. 

 Pyram'idal : shaped like a pyramid. 



Race : a variety of such fixity as to be reproduced by seeds. 



Raceme' (L. racemus,* bunch of grapes) : a simple inflorescence, elongating 



at the apex, with pedicels of the individual flowers of about equal length. 



Fig. 82, r. Rac'emose : borne in racemes ; raceme-like. 

 Ra'chis or rhachis (Gr. rhachis, a backbone) : the axis of an inflorescence, 



compound leaf, or frond. 

 Ra'diate (L. radius, spoke of a wheel) : divergent from a common center ; 



bearing ray flowers. 

 Rad'ical (L. radix, a root) : belonging to or proceeding from the root, or 



from the base of the stem close to the ground. 

 Rad'icle : the name sometimes given to the whole of the hypocotyl, 



but more properly restricted to the embryo root at the tip of the 



hypocotyl. 



Radic'ulose : bearing rootlets. 

 Ra'dix : the root developed from the radicle. 



Ra'phe or rha'phe, pr. ra'phy (Gr. rhaphe, a suture or seam) : the con- 

 tinuation of the seed stalk along the side of an anatropous ovule. 



Fig. 300. 



Ray : the marginal portion of a composite flower ; a branch of an umbel. 

 Ray flower or flor'et : an outer flower of the head of the Compositae, whether 



tubular or ligulate. Fig. 268. 



