238 LETTER L. 



'* Calyx present in some kind of state," 105. ; at that 

 numl)er " Ovary superior" carries you forward to No. 

 1 19- ; at that point, "Leaves without stipules" refer you 

 to No. 133. ; there " Flowers bisexual " take you to No. 

 134,; thence '* Sepals more than two," to No. 135. 

 There you may be stopped by not knowing whether 

 Glaux, with a one-celled ovary, and a free central 

 placenta, belongs to 136. or 144. ; but a little re- 

 flection will remind you, that such a structure is a 

 consequence of the consolidation of several carpels 

 (see Vol. 2. page 214.), and, consequently, you de- 

 cide for No. 136. ; at that contrast, " Placentas in 

 the axis " correspond with your plant, and you move 

 on to No. 137. ; thence by " Number of ovules very 

 great," to No. 140. ; then by " Carpels conso- 

 lidated at the point" to No. 141., whence " Stamens 

 perig}Tious," carry you to No. 142., where, finally, you 

 have the character ** Fruit one-celled," which safely 

 disembarks you in the desired haven, the land of the 

 Primrose Tribe. 



Another instance, and I have done. Correa, a com- 

 mon, and very pretty genus of the Rue Tribe, has its 

 petals united into a tube, so as to seem as if mono- 

 petalous, although the plant belongs to a Polypetalous 

 order. This, then, is a great puzzle to a beginner, 

 and a fitting subject by which to try the goodness of 

 the tables. You will first proceed from No. 1. to No. 

 2. ; from No. 2. to No. 3. ; and from No. 3. to No. 4. 

 Here, if Correa were conformable to the character of 

 its order, you would proceed to No. 5. ; but, as it is 

 monopetalous, and, therefore, unconformable, you take 



