288 



THE PEAJH 



Fig. 236. 



Fig. 237. 



3. The SerJto?is are founded on the glands of the leave) 

 Section I, comprehends those whose leaves are deeply anQ 

 sharply serrate, (or cut like saw-teeth,) and having no 



glands (or gum-like mi- 

 nute knobs) at the base, 

 fig. 235. Section II, 

 contains those whose 

 leaves are crenate or 

 serrulate, (with shallow- 

 er and more rounded 

 teeth,) and having glo' 

 ^"4\/ "^l^l?/^ \^l^ -^ ^^^^ glands, fig. 236. 



^^W '\i fi W^'' Section III, includes all 



■"^'■^ ^^ ^ ■'^^'' those whose leaves are 



crenate or serrulate, 

 having reniform (or kid- 

 ney-shaped) glands, fig. 237. "The form of the glands,'' 

 observes Lindley, " as well as their position is perfectly dis- 

 tinct ; they are fully developed in the month of May, and 

 they continue to the last permanent in their character, and 

 are not affected by cultivation. The globose glands are 

 situated, one, two, or more, on the foot stalks, and one, two, 

 or more, on the tiys or points of the serratures of the leaves. 

 The reniform glands grow also on the footstalks of the 

 leaves, but those on the leaves are placed ivithiji the serra- 

 tures, connecdng, as it were, the upper and lower teeth of 

 the serratures together ; their leaves, when taken from a 

 branch of a vigorous growth, have more glands than the 

 leaves of the globose varieties. It will, however, sometimes 

 happen that glands are not discernible on some of the 

 leaves, especially on those produced on weak branches ; in 



this case, other branches 

 must be sought for which 

 do produce them." 



4. The sections thus 



formed are each divided 



into two subsections ; the 



first embracing those 



Fig. -i-Jr- Fig. 23[). which have large jlow- 



erSf as in fig. 238; and the second including such as bear 



email flowers, fig. 239. The sub-sections are in most cases 



