X HOW TO USE THE KEY AND THE FLORA. 



Turn, then, to the heading marked B, page xv, * stamens not 

 more than twice as many as the petals." Under this we find 

 two subordinate headings, designated by asterisks * and **. 

 The first of these is not applicable to our plant. Under the 

 second, marked thus **, we find two minor headings, desig- 

 nated by daggers, -Hand-J 1-. The firstof these, ' Corolla irreg- 

 ular," is clearly the one we want. We have now, therefore, 

 five families to select from. We cannot choose any one 

 of the first four, because our plant has ten stamens, but the 

 characters of the fifth are precisely the characters exhibited 

 by Clover. Our Clover, therefore, belongs to the Order 

 LEGUMINOS^I. Turning to page 50, and running through the 

 " Synopsis of the Genera " as there given, we observe that 

 No. 2, TRIFOLIUM, is the only Genus in which the flowers are 

 in heads. Clover answers the description in the other respects 

 also viz. : " leaves of three leaflets," and " stamens diadel- 

 phous." Theonly question then remaining is, whichSpecies 

 of TRIFOLIUM have we in hand ? Turning to page 52, we find 

 we have eight Species to choose from. No. 2, TRIFOLIUM 

 pratense, is the only one of them with purplish floivers. 

 TRIFOLIUM pratense must, consequently, be the botanical 

 name we are looking for. 



Possibly the observer may decide that the parts of the 

 corolla are not separate from each other, because in some 

 instances it is really a doubtful question. He must then turn 

 to page xvii, and under II. GAMOPETALOUS DIVISION, he must 

 pursue his enquiries as before. Is the calyx superior ? Plainly 

 not. Proceed then to the heading B, "Calyx inferior." Are 

 the stamens more than the lobes of the corolla ? Yes. Then 

 the choice of the six Orders in the section marked * is easily 

 made as before, and the plant is referred to LEGUMINOS.E. 



Now let us take the Strawberry. As with Clover, we decide 

 without difficulty that the plant is a DICOTYLEDON. The 

 carpels are separate, and produce achenes in fruit ; the plant 

 must, therefore, be an ANGIOSPERM. And there is no doubt 

 that it is Polypetalous. As the stamens are very numerous it 

 must come under the section marked A. Under this section 



