274 



CONSERVATIVE ORGANS. [LECT. VI. 



2 



'V' 



stems; in designating which, the word cor- 

 nered is used, instead of obtusely angled, for 

 the sake of brevity. A stem is said to be, 

 ]. Three-cornered (trigonus), (fig. t, l, and 

 */ *> when there are three flat sides 

 A, and three rounded angles. 



2. Four-cornered (tetragonus), (fig. #, 2), 

 when there are four rounded angles. 

 Sometimes the corners are bordered (fig. 



*, 2). 



3. Five-cornered (pentagonus), (fig. t, 3), 

 when there are five obtuse angles. In this 

 instance, also, the corners are some- 

 times bordered (fig. *, 5), and the in- 

 tervals occasionally furrowed. 



4. Six-cornered 

 (hexagonus), fig. 

 t, 4), when there 

 are six obtuse 

 angles. 



5. Many-cor- 

 nered (polygo- 



when the angles 

 are numerous 

 and obtuse: /3. Acute (acut& angulatus), when 

 the angles are sharp, and the sides hollowed. 



t " Digonus, trigonus, tetragonus, pentagonus, polygonus, 

 " precedents (anceps) species sunt." Phil. Bot. 82. 13. 



