BOTANY FOR YOUNG PEOPLE. 141 



L. Five. It is in the fifth class, and as there 

 is but one pistil, in the first order. 



E. We will suppose the directory points to 

 New York State by the class, and to New York 

 City by the orders. We will next find the 

 street and house, which we can do by the cor 

 responding generic and specific marks. 



L. Why this must be exactly the plan pur- 

 sued at the Post Office, in sending ofT letters that 

 are directed to different persons. 



E. It is. Now having found the class and 

 order, let us turn to the list of genera in the 

 first order of the fifth class. You will find such 

 a list in any of the larger systematic works on 

 botany. 



L. It compares best with the Mirabilis or 

 Marvel of Peru ; the corona is funnel formed, 

 narrow below, the calyx inferior, and it has a 

 globular stigma. 



E. You are right. Turn now to the genus 

 Mirabilis, and see with which of its species it 

 agrees. 



L. Mirabilis Dichotoma Mexican Four 

 O'Clock ; flowers sessile, axillary, erect, solitary. 

 It cannot belong to Mexico then. Now for an- 





