SUMMITS AND SURFACES OF LEAVES. 



33 



Cuspidate, Fig. 52, terminated suddenly by a 

 bristly point. Ex. Rosy thtonia, (Tritonea Ro- 

 sea.) Mucronate is nearly a synonymous term, 

 and applicable to the spiny terminations of the 

 leaves of the Thistles, and some species of the 

 Aloe. 



Fig. 52 



Emarginate, Fig. 53, (nicked,) having a small 

 notch at the end. Ex. Bladder senna, ( Colutea ar- 

 bor escens.) 



Fig. 54. 



Fig. 55. 



Obtuse, Fig. 54, (blunt-pointed,) the termination 

 being in the form of the segment of a circle. Ex. 

 Primrose, (Primula.) Examples of this are not com- 

 mon. 



Cirrhose, Fig. 55, (tendrilled,) the leaf ending 

 in a tendril or clasper, by which the plant clings 

 for support. Ex. Superb Gloriosa, ( Gloriosa su- 

 perba.) 



With respect to the surfaces of leaves, the following dis- 

 tinctions are made. 



Fig. 56. 



Smooth, Fig. 55. A leaf is said to be smooth, 

 when it is without hairs, wrinkles, or ribs. Ex. 

 Indian cucumber, Water plantain. 



Velvety, (Villose,) covered with soft hairs or down. 

 Velvet leaved Primrose, (Primula villosa.) 



What is the form of a cuspidate leaf? Of an emarginate leaf? Of 

 an obtuse leaf? Of a cirrhose leaf? Give an example of a smooth leaf, 

 Of a velvety leaf. 



