500 CONSERVATIVE ORGANS. [LECT. IX. 



ter of the border, the margin receives different ap- 

 pellations. Thus it is termed cartilaginous (carti- 

 lagineus), when it is firmer than the disk and 

 somewhat elastic. This cartilage is generally 

 whitish, yellowish, pinkish, or some other colour, 

 but is seldom green. It is termed horny (cor- 

 neusj, when it resembles the cartilaginous, but is 

 harder and less elastic: ciliated (ciliatm), 46, 

 when beset with soft parallel hairs, not closely set 

 together ; but if the hairs be stiff and like bristles, 

 it is then said to be aculeato-ciliatus. (See fig. 1 . 

 Plate 4). 



If the margin be studded with small granular, 

 either opaque or semitransparent bodies, exuding 

 some kind of fluid, it is termed glandular (glan- 

 dulosus) ; but, if these glands be supported on 

 hairs, glanduloso-ciliatus, 48. 

 **** Rolled. 



When the margin is rolled backwards, or upon 

 the under surface of the leaf, it is said to be re- 

 volute (revolutus), 49; when forwards, involute (in- 

 volutus). In some instances the margin, compre- 

 hending a portion of the disk of the leaf, is so much 

 more expanded than the rest of the disk, that it 

 assumes a waved character, or is undulated (un- 

 dulatus), 5O ; and when it is still more expanded, 

 so that the margin is variously curled and twisted, 

 it is termed curled (crispus). These appearances 

 occur in leaves, which have very different kinds of 

 margins in other respects. 



