ARTIFICIAL TABLE. 2.37 



reach No. 120. At that point you, of course, take 

 " Flowers unisexual," and so proceed to No. 121. 

 Here you find " Carpels solitary," contrasted with 

 '* Carpels more than 1 ;" and it is obvious that your 

 plant belongs to the first ; it is, therefore, of the 

 Nettle Tribe ; and thus you have reached the desired 

 information. 



Let Sage (Salvia oflficinalis) be the next plant for 

 trying the key. Without going over again the words of 

 the earlier parts of the contrast, it is sufficient to say, 

 that No. 1. refers you to No. 2., No. 2. to No. 3., 

 No. 3. to No. 4., No. 4. to No. 157. ; hence we will 

 proceed more carefully. At this point " Ovary supe- 

 rior" sends you to No. 158. ; thence *' Flowers irre- 

 gular" take you to No. 185. ; when there you have 

 " Ovary four-lobed," contrasted with " Ovary undi- 

 vided," and as your Sage corresponds with the former, 

 it belongs to the Mint Tribe. 



Now, for a case or two of plants that do not cor- 

 respond with all the characters assigned to the orders 

 to which they belong. It is here that the tables 

 should be of the greatest use ; for the last thing 

 which a student learns, is how to deal with exceptions. 

 Glaux, a little coast plant, common on the sandy 

 beach in many places, is a remarkable puzzle ; it 

 is destitute of corolla, and yet it belongs to the Mono- 

 petalous Primrose Tribe, with which it corresponds in 

 every thing, except the presence of a corolla. You 

 will readily detect its place in the system by the table. 

 As before. No. 1. refers you to No. 2. ; No. 2. to 

 No. 3. ; No. 3. to No. 97- ? where it corresponds v/ith 



