MUDS AND LEAVES. 



2n 



Ihp stem ; it \h then dcnominfttod perfoliate. In other cases ft pair of 

 loaves have thfir busub united about the stum ; such leaves uro termed 

 connate. 



Fio. ;U,— Lcnf of tnliptree with dccIJuous 



hli|illll«. 



Fio. ni. — Loiif ot i^.-<o wiUi |)orir.uui!iit foll- 

 at'couB Rtipulos. 



The petiole is often furnished at its base with a p.iir of f(»liaceous or 

 membranous appeurhijjfes, termed stipules. Very often these servo as 

 bud-scales and fall away after the leaf expands (Fig. 33) ; sometimes, how- 



frTTnnnnnnrnPr=Tit 



_ _ _ _ .p- iT y 1^. j — ' ^ 



QDCT 



iipii 



Fio. SB. — Vertical Bection through a bronth- 

 liiR-piiro of ,1 loaf, Rhowiun the arrangemont of 

 thu epidermal cells. MngnifleJ. 



FiQ. an. — Vertical section of a leaf, showing cells 

 of epidermis imd parenchyma, and intercellular 

 spaces. Magnified. 



ever, they form a conspicuous j^ai't of the leaf and remain until it falls 

 (Figs. 32 and 34). 



