GENEEAL MORPHOLOGY OF THE PLANT 75 



base and apex, as in the White Willow (Salix alba), the leaf 

 is lanceolate (fig. 134) ; when it is a little longer than broad, of 

 about the same breadth at equal distances from its base and apex. 



Fig. 146. 



Fig. 148. 



Fig. 147. 



Fig. 149. 



Fig, 145. Lunate or crescent-shaped leaf. Fn/. 146. Sagittate leaf. 



Fig. 147. Hastate leaf. Fig. 148. A portion of the stem of the Woody 



Nightshade (Solanum Dulcamara), bearing flowering stalk and an auricu- 

 late leaf. Fig. 149. A sub-rotund or rounded leaf, with entire margins. 



which are slightly acute, it is oval or elUptical [fig. 142), as in the 

 Lily-of-the-valley {Convallaria majalis) ; if under the same cir- 

 cumstances it is obtuse or rounded at each end {fig. 138), it is 



