150 MANOAL OP NATITRE STUDY. 



The upper part of a gamopetalous corolla, wheth- 

 er divided or united, is called the border^ or limb ; 

 for example, the flaring part of the morning glory 

 corolla, or the divided upper part of phlox, is a bor- 

 der or limb. 



A gamopetalous corolla is said to be salver-form^ 

 when the limb or border is abruptly spreading up- 

 on a long, slender tube ; as in phlox. It is said to 

 be tubular^ when the border does not spread, as in 

 the corolla of the trumpet honey-suckle. 



The corolla is said to be wheel-shaped when the 

 border upon a very short tube spreads out like a 

 wheel, as in bitter sweet and potato. 



The funnel form corolla, as the name implies, is 

 shaped like a funnel, as in morning glory or bind- 

 weed, where the tube gradually enlarges upward 

 from a narrow base and expands outward into a 

 wide border. 



The teacher should collect a series of flowers, 

 ranging all the way from a slight coalescence of 

 parts to a full united corolla, and proceed to dis- 

 tinguish the different botanical names by the study 

 of the different forms under observation. Deal with 

 each flower something after the following method : 



Description of calyx, whether polysepalous or 

 gamosepalous. If gamosepalous, is it tubular, 

 notched or cleft. How many cleft? Color. 

 Description of corolla. 



