46 



NOMENCLATURE. 



If the clefts go as far as the central rib, so that the sub- 

 stance of the leaf is divided, we say, that it is sectiis. We 

 say also, Jhlia trisecta, ternatim secta, and we call the cleft 

 parts segmenta. 



53. 



The clefts themselves, or the interstices between the pro- 

 jecting parts, are called sinus, when they form curved lines ; 

 hence a sinuated leaf {unciatum), is that which has bendings 

 of this sort on its margin. 



Deep rents on the surface, when they are altogether irre- 

 gular, give the idea of to7'n, or 7'ent {laceratus, or multifldus) ; 

 smaller irregular projections and rents render the part eroded 

 {erosus). 



Angled (angulaius), when the margin has projections 

 which are greater than teeth, but are not proper lobes. When 

 these angles come out very feebly, and often are undistinguish- 

 able, the margin is said to be repand {repandus). 



54. 



Palmated [palmatus), is when the surface is lobed, or cleft, 

 and its clefts go commonly in five divisions to the under part 

 of the surface. 



Pinnatifid {pinnatifidus), when a surface has long parallel 

 lobes, or clefts, on both sides. It coincides frequently with 

 the decursive pinnatum (47.) Bipinnatifid {hipinnatifidum), 

 is when either the side-lobes are again pinnatifid, or when, in 

 a properly pinnated part, the side-leaves shew this half feather- 

 ing- 



Lyre-shaped {Jyratus), is a pinnatifid surface, the high- 

 est unpaired lobe of which is rounded, and the side-lobes be- 

 come always the finer the nearer they approach the base. 



Runcinate (runcinatus), again, is when the uppermost un- 

 paired lobe of a pinnatifid surface is pointed, and the side- 

 lobes hang down. 



