OF BOTANY. 7 



A Precedent for questioning respecting Classes. 



Teacher. On what organs are the characters of the 

 classes founded ? 



Pupil. The stamens, excepting the 22d class. 



T. What circumstances respecting these organs ar& 

 noticed in distinguishing the classes ? 



P. Number, proportion, connexion and position. 



T. What classes are characterized by number only { 



P. The eleven first classes. 



T. Which by number and position ? 



P. The twelfth and thirteenth. 



T. Which by number and proportion ? 



P. The fourteenth and fifteenth. 



T. Which by connexion only ? 



P. The sixteenth and seventeenth. 



T. Which by number and connexion ? 



P. The eighteenth. 



T. Which by position only ? 



P. The nineteenth, twentieth and twenty-first. 



T. How are plants of the 22d class distinguished from 

 the other classes ? 



P. By general family habits. 



Questions upon the orders, &c. may be arranged upon 

 the same principle ; and these greatly extended. 



A Precedent for questioning in the Analysis of Plants. 

 The common Mullein. 



T. To what class does it belong ? Why ? TQ what or- 

 der ? Why ? To what section ? What* is the generic 

 name ? [suppose the answer is verbascum] Why is the 

 corol wheel-form ? \Vhat do you mean by irregular ? How 

 are the stamens declined ? Shew me the cells and valves of 

 the capsule. 



NOTE. There are frequent cases where characters are 

 given which cannot present themselves at the first flow- 

 ering ; as in the mullein the inflexed edges of the valves 

 will not appear. In most cases of this kind, there will be 

 found matured capsules, &c. while some flowers are still in 

 bloom on the same plant. But there are cases where the 

 description drawn from the matured state of the organ is 

 a factitious, not an essential character. Factitious" char- 

 acters often assist us by directing to the proper course 



