FORM AND STRUCTURE 
FORMS OF LEAVES. 
By General Outline we mean the outline form of the leaf, 
disregarding marginal indentations and slight irregularities. 
HPVs 
Fic. 10. Fic. tr. Fic. 12. Fic. 13. Fic. 14. Fic. 15 
Fic. 16, Fic. 17. Fic. 18. Fic. 19. 
The principal forms found in the leaves of trees are the 
following : 
Needie-shaped, like the leaves of the Pine. (Fig. ro.) 
Linear, a narrow elongated form. (Fig. rr.) 
Oblong, two or three times longer than wide with sides nearly 
parallel. (Fig. 12.) 
Elliptical, oblong with a flowing outline, the two ends alike in 
width. (Fig. 13.) 
Oval, broadly elliptical. (Fig. 14.) 
Lanceolate, broader at base than apex, but narrow. (Fig. 15.) 
Oblanceolate, the lanceolate reversed. (Fig. 16.) 
5°07 
