102 



OUTLINES OF PLANT LIFE. 



cs^ ,?a 



winged, as in the orange. It may be entirely wanting, in 

 which case the blade arises directly from 

 the base, as in most grasses (fig. 88). 



127. 3. The leaf blade.— To this part 

 of the leaf the word " leaf " itself is fre- 

 quently applied. In gen- 

 eral, the leaf blade is so 

 broadly winged as to be 

 thin and flat; but all 

 gradations exist between 

 such forms and those that 

 are much folded or crum- 

 pled, thick and fleshy, or 

 even cylindrical. 



If a thin blade be held 



I'iG. gr. 



Fig. 92. 



Fig. 91. — Stipules of Polygonum forming a 

 sheath, c, above the sheathing leaf base j, of 

 the cut-off leaf 7^; cc, the stem ; ca, an axillary 

 shoot. Natural size. — After Frank. 



Fig. 92. — Leaf of l htnspi with clasping base. 

 Natural size. — After Prantl. 



Fig. 93. Fig. 94. 



Fig. 93.— Shoot of t'z'a/iz>-/«, showing perfoliate leaves below. About half natural 



size. — After Gray. 

 Fig. 94.— a shoot of wild honeysuckle, showing upper leaves connate-perfoliate 



About half natural size.— After Gray. 



