BULLIFOKM CELLS. 



21 



0"^. Til tlio louvort of /'(iin'rinii jilint/inii, i\w hiiiuLs of bulli- 

 form (;ells iiro first on the upper sid(! aiul thon on tlio lower, luul 

 are found in tlie grooves. 



Fid. ~i'.— Transversii Hpotion of a hladf nf Pdiiirtim iiUratnm. in wliicli tlif biilli- 

 I'lriii iclls iiru altt'iMiatuly iibovo and bulow. IxKi. (I)uval-.l(iuvi'). 



10°. Fn ciiso of Andi'opotjDii 

 /iriiKn'i/r.s, and otlier ppei'ies. 



tiu'so cells ure of nearly nni- 

 fonu size, iind distributed all 

 Fro. no.— Section of a loaf of A>iiiriii»ifii,n along the uniier surfiU'c, ex- 



jiriiinidix.wlicrotlii^ bulliforni ci'lls are ovcnly "^ '^ '■ 



''a)ulT.iom^-)l"''^ ''■""■ ^'•"'•feptinjj over the veins. 



Fi(i.ril.— Sortion.tliroiiKli tlio midrtli'.of a leaf of ]'(ispal}irn pUcatiim, showlns frreg- 

 >ilar epidermis and many bullifonu cells. 1 xT)*).— (Sudwortli.) 



Fig. S^i.— Pi. a transverse section of a li-af of Trnchiifmgnn poliimorphiw, showing 



small t^piderniai and very large bulliform cells. 1 xuO.— (Sudworth.) 



