2S An l7ii7'oduEiion to 



A membranaceous leaf [membranaceum) is 

 one that the membranes .do not inclofe any 

 pulp. 



A deprefled leaf {deprejfum) is one that 

 appears as if it was preffed on the fide which 

 regards the ftalk. 



A com preffed leaf [comprejjum) is one that 

 is impreffed on the two oppofite fides which 

 do not regard the ftalk. 



A flat or plain leaf [phmini) is when both 

 the furfaces are level and parallel every where. 



A convex leaf {convexzm) is a depreffed 

 leaf raifed in the middle above the fides. 



A concave leaf [concavurn) is one that is 

 hallowed in the middle. 



A channelled leaf {ccinali(;iilatum) is one that 

 is channelled or guttered the whole length, fee 



fig. 6 1. 



A fword-fhaped leaf {enfiforme^) is one that 

 is compreffedj and edged like a fword on both 

 fides, with a convex middle the whole length, 

 as the Flag'leavd Iris, &c. 



A fabre-fliaped leaf (^acinaciforme) is a com- 

 pre&d flefliy leaf like the point of a fpear, with 

 one edge convex and narrow, the other broad- 

 er and raifed, and the inner blunt and fi:raiter, 

 as in the Mejembryanthemum acinaciformi^ Lin. 

 fee fig. 56, 



An 



