44 



3. Veining: parallel, netted; midrib — central 



line; ribs — second in size; reins — third in 

 size; veinlets — minute lines. 



4. Kinds of leaves: simple — one blade, com- 



pound — more than one blade, palmately 

 compound — blades from one point, pin- 

 nately compound — blades arranged along- 

 side. 

 V. Forms of leaves : broadest in the middle — orbicular, 

 oval, elliptical, oblong, linear, needle-shaped; 

 broadest near base — deltoid, ovate, cordate or 

 heart-shaped, lanceolate, awl-shaped, scale- 

 shaped; broadest near apex — obovate, obcordate, 

 oblanceolate, cuneate or wedge-shaped. 



1. Bases of leaves: cordate or heart-shaped, 



auriculate. Abrupt, tapering, peltate or 

 shield-shaped, reniform or kidney-shaped, 

 halberd-shaped, oblique. 



2. Apexes of leaves: truncate, retuse, emar- 



ginate, obcordate, obtuse, acute, acumin- 

 ate, bristle-pointed, spiny-pointed, mu- 

 cronate. 



3. Margins: entire, repand, sinuate, dentate, 



serrate, crenate, lobed, notched, cleft, 

 parted, divided, pinnatifled. 

 VI. Nature of Leaves. 



1. Surface — pubescent, glabrous, canescent, 



scabrous. 



2. Texture — succulent, punctate, membran- 



ous, thick, thin. 



