34 



ORGANOGRAPHY. 



(Fig. 58) ; peltate (Lat. pelta, shield), when the petiole is 

 attached to the under-suiface near the middle (Fig. 49). 



t38. The apex of leaves 

 may be : acuminate, 

 ending in a prolonged 

 point (Fig. 59) ; acute, 

 ending in an acute angle 

 (Fig. 60); obtuse, with 

 a blunt point (Fig. 61); 

 07 58 truncate, with the end 



as if cut square off (Fig. 62) ; emarginate, notched at the 

 end (Fig. 63) ; obcordate, with a deep notch, or inversely 

 heart-shaped (Fig. 64); cuspidate (X/at. cuspis, point), 

 tipped with a sharp, stiff point (Fig. 65) ; aristate (Lat. 

 arista, awn), with a long bristle or awn (Fig. 66). 



39. The margin of leaves may be: entire, that is, the 

 edge is an even line without any notches or teeth (Fig. 

 58) ; serrate (Lat. serra, saw), with teeth like a saw pro- 

 jecting towards the apex (Fig. 67) ; dentate (Lat. dens, 

 tooth), with teeth pointing outwards instead of forwards 



(Fig. 68) ; crenate (Lat. erena, scallop), scalloped (Fig. 

 69); undulate (Lat. undula, wave), wavy (Fig. 70); 

 incised, when the edge is cut or jagged (Fig. 71). 



40. When leaves are deeply and regularly cut, the 



Figs. 56-S8. Base of leaves : 56. Auriculate ; 67. Sagittate ; 58. Hastate. Figs. 

 59-66. Apex of leaves : 59. Acuminate; 60. Acute; 61. Obtuse; 62. Truncate; 

 63. Emarginate; 64. Obcordate; 65. Cuspidate; 66. Aristate. 



