290 



BOTANICAL GAZETTE 



[OCTOBER 



PSEDERA QUINQUEFOLIA 



Leaf 



Stem 



M 



X 



M 



T.... 

 UE.. 



P 



Sp. . . 

 LE.. 

 OW.. 

 Cu. . 



no/x (99-130) 



183 M 



(164-I95) 



14 =13 per cent 



21 = 



= 11 per cent 



24 =22 



56 = 



= 3* 



59 =53 



90 = 



= 49 



x% =12 



16 = 



= 



N... 36 



D... 78 /*(i2o) 



i-5 



0.7 



3 

 i-5 



W... 



F 



1 • • • • 



JLi« • • • 



R. .. 1 



C. . . . 196 

 S.. . .112 



2.8 

 4.6 

 7.2 



X 



40.5 



61 fl (90) 



3-4 

 5-9 



4-7 

 1.2 



188 



62 



In both side walls of epidermal cells 



Exceptional in the smaller area of 



plane except in lower surface of M , cross-sections of vessels in X, less scle- 



cuticle ridged, hairs on the lower surface. renchyma and cork; the cork is loose 



X. — Epidermal cells larger in surface, and shreds off, so more may have been 



smaller in depth; other points as usual lost in X than in M; the other points 



except there is not greater development agree with the majority, 

 of conductive tissues. — Figs. 30 and 31. 



30 



31 



Figs. 30, 31. — P seder a quinquefolia: sections of leaves; fig. 30, mesophytic form; 

 fig. 31, dune form. 



