'JO 



The Neiv York State College of Forestry 



Leaf Classification — Continued 



E. Leaves Classified as to Base — Concluded 



5. Auriculate, with ear-like appendages at the base. 

 (Fig. 28.) 



F. Leaves Classified as to Margin 



1. Entire, said of a margin without teeth or indentation. 



2. Undulate (or repand), shallowly wavy. (Pig. 29.) 



32 33 34 



Leaf Margins 



35 



G. 



3. Sinuate, strongly wavy. (Fig, 30.) 



4. Dentate, toothed, generally with the teeth projected 



outward. (Fig. 31.) 



5. Serrate, with sharj^ teeth projecting forward. (Fig. 



32.) 



6. Crenate, dentate or serrate with rounded teeth. (Fig. 



33.) 



7. Lobed, divided into lobes by sinuses which extend not 



more than half way to the midrib, either the sinuses 

 or lobes rounded. (Fig. 34.) 



8. Cleft, divided into lobes by sinuses which extend half 



way or more to the midrib, either the sinuses or 

 lobes, narrow or acute. (Fig. 35.) 



9. Parted, divided by sinuses which extend nearly to the 



midrib. (Fig. 36.) 

 Leaves Classified as to Venation 



1. As to the arrangement of veins. 



a. Pinnately veined, veins branching laterally from 



a strong longitudinal median vein, the mid- 

 rib. (Fig. 38.) 



b. Palmately veined, primary veins radiating from 



the apex of the petiole. (Pig. 37.) 



