MARGIN OF LEAVES, 427 



2. Prjemorse, bitten in the fore-part ; when they are very otn 

 tuse, and are terminated by unequal notches or incisions. 



3. Retuse, blunted ; when tfyey terminate in an obtuse sinus, 



4. Emarginate, nicked; when they terminate in a notch. 



5. Obtuse, blunt; when they terminate, as it were, within a 

 segment of a circle. 



6. Acute, sharp ; when they terminate in an acute angle. 



if. Acuminate, pointed; when they terminate in a subulate 

 apex. 



8. Cirrhqse, tendriled ; when they terminate in a clasper or 

 tendril, as in Gloriosa, . . .Flagellaria,. . .and Nissolia. 



V. The Margin of a leaf is the outermost boundary of its 

 sides, exclusive of its disk. Leaves, in respect to their margin, 

 are, 



1. Sptnose, thorny, or prickly ; when the margin of the leaf 

 runs into points that are harcl, stiff} and pungent. 



2. Inerm, unarmed or smooth : which is opposed to spinose. 



3. Dentate, toothed or indented ; when the margin ends in 

 horizontal points, that are of the consistence of the leaf, and are 

 separated by intermediate spaces. 



4. Serrate, sawed; when the margin is cut into sharp imbri- 

 cate angles, that point towards the extremity of the leaf : if they 

 point towards the base, the leaf is said to be Retrorsum Serrate, 

 sawed backwards. 



5. Duplicato-Serrate, doubly saivcd ; when there h a two-, 

 fold serrature, the less upon the greater. 



6. Crenate, notched; when the margin, is cut into angles, that 

 point towards neither of the extremities; and these are obtusely 



