EXPLANATION OF THE TERMS USED 9 



(Fig. 83 g). Minutely (Fig. 83 e). Round- (Fig. 93 b). Double- (Fig. 92 j). 

 Sharp (Fig. 94 c and k). Blunt (Fig. 94 f). 

 Trifoliolate (3-fol.). A compound leaf with three leaflets. 



Undulating. When the outline of a leaf is curved into a series of shallow bays 

 not pronounced enough to be called teeth or lobes. (Fig. 98 B.) 



Unisexual. Of one sex only. A flower or catkin with stamens, but without, or 

 with rudimentary pistil is called male (Fig. 81 b); one with a pistil, but without, 

 or with rudimentary stamens is female (Fig. 81 a). A flower possessing both is 

 bisexual (Fig. 81 e). 



Variety. See Species. 



Wavy, When the margin of a leaf is crinkled or folded in a vertical plane, 

 as distinct from undulating, where the curvature is in a horizontal plane. 

 (Fig. 120 M.) 



Whorl. A group of three or more stems, leaves, or flowers arising from the same 

 level on all sides of the main axis. (Fig. 55.) 



