4 8 



BOTANY. 



serted upon the receptacle, and the calyx also is inserted 

 upon the receptacle. 



Look at the magnified flowers shown in section on 

 Chart i, and point out the receptacle in each case. Are 

 all these receptacles alike in form ? State, in regard to 

 each flower, where the pistil is inserted ; where the sta- 

 mens ; where the corolla ; and where the calyx. Which 

 floral whorl in each flower occupies most space upon the 

 receptacle ? Are these flowers perfect ? Are they com- 

 plete ? Are they symmetrical ? 



Repeat these observations upon the magnified flowers 

 shown in section in Chart 2 ; in Charts 3, 4, 5, 6. 



Make a longitudinal section of each of your living 

 flowers, and look for the insertion of the floral organs. If 

 you sometimes fail to discover it, do not be discouraged. 

 It will not, of course, be as clearly visible as it is shown 

 to be on the chart. Try again. Make frequent attempts, 

 as failure is often due to lack of experience. 



EXERCISE XX. 

 Polyandrous Stamens. 



We now return to the study of the flower at the point 

 where it was left in Schedule Seventh. 



The third column of this schedule, you remember, is 

 the place where you wrote whether the parts of floral 

 whorls are grown together or not. You have studied the 

 calyx and corolla to learn whether their parts are grown 

 together. If the sepals are not grown together, you say 

 the calyx is polysepalous ; and, if they are grown together, 

 you say it is gamosepalous. So, also, when the petals of the 

 corolla are distinct, you say the corolla is polypetalous ; and, 

 when grown together, gamopetalous. 



Gather all the flowers you can find, and observe the 

 stamens to see if they are grown together. Put aside all 

 that are in the least grown together. 



