4G 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 sectus. We 

 say also, Jhlia trlsccta^ ternatlm secta^ and we call the cleft 

 parts segment a. 



53. 



The clefts themselves, or the interstices between the pro- 

 jecting parts, ai-e called ainus, 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 torn, or rent [laceratus, or multifidus) ; 

 smaller irregular projections and rents render the part eroded 

 (erosus). 



Angled {angulatus), w^hen 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). 



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

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

 of the surfiice. 



Pinnatifid {pinna iifidiis), when a surface has long parallel 

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

 the decursive pinnatum (47-) Bipinnatifid {hipinnat'ifidum), 

 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, tlie high- 

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

 come always the finer the nearer they approach the base. 



Runcinate {runc'matus), again, is when the uppermost un- 

 paired lobe of a pinnatifid surface is jx)inted, and the side- 

 lobes hang down. 



