SUMMABY. 81 



When the netted-veined lamina has two or more ribs, the venation ie 

 said to be palmately veined. 



When the palmatelyjveined lamina has diverging ribs, the venation is 

 said to be divergipalmately veined. 



When the palmately veined lamina has converging ribs, the venation is 

 said to be convergipalmately veined. 



When the parallel- veined lamina has but one rib, the venation is said to 

 be costal-nerved. 



When the parallel-veined lamina has several ribs, the venation is said to 

 be basal-nerved. 



When the basal-nerved lamina has diverging ribs, the venation is said 

 to be flabellinerved. 



When the basal-nerved lamina has converging ribs, the venation is said 

 to be longitudinal-nerved. 



When the lamina can be divided longitudinally into two similar halves, 

 it is said to be symmetrical. 



When the lamina can not be divided longitudinally into two similar 

 halves, it is said to be unsymmetrical. 



When the symmetrical lamina can be divided again by a lateral plane 

 into two similar halves up and down, it is said to be disymmetrical. 



When the symmetrical lamina can not be divided again by a lateral plane 

 into two similar halves up and down, it is said to be monosymmetrical. 



When its margins are without notches of any kind, the lamina is said to 

 be entire. 



When its margins present notches of some kind, the lamina is said to be 

 uneven. 



When its margins are cut into small indentations, the lamina is said to 

 be dentate. 



When its margins are cut into divisions extending not more than half 

 way down, the lamina is said to be lobed. 



When its margins are cut into divisions extending more than half way 

 down, the lamina is said to be parted. 



When its margins are cut into divisions reaching to the midrib or the 

 base, the lamina is said to be divided. 



When the apex of the lamina is sharp, it is said to be acute. 



When the apex of the lamina is rounded, it is said to be obtuse. 



When the apex of the lamina is abruptly pointed, it is said to be 

 mucronate. 



When the apex of the lamina is straight as if cut across, it is said to be 

 truncate. 



