THE LEAF. 



29 



jections outwards (Fig. 27) ; peltate (Lat. pelta, shield), when 

 the petiole is attached to the under surface near the middle 



Fig. 23. 



Fig. 24. 



(Fig. 18). The apex of leaves may be : — acuminate, ending 

 in a prolonged point (Fig. 28); acute, ending in an acute 



Fig. 25. 



Fig. 27. 



angle (Fig. 29) ; obtuse, with a blunt point (Fig. 30) ; trun- 

 cate, with the end as if cut square off (Fig. 31) ; emarginate, 

 notched at the end (Fig. 82) ; obcordate, with a deep notch, 



Fig. 28, 



or inversely heart-shaped (Fig. 33); cuspidate (Lat. aispis, 

 point), tipped with a sharp stiff point (Fig. 34) ; aristate (Lat. 

 arista, awn), with a long bristle or awn. 



10. The margin of leaves may be : — entire, that is, the edge 



