150 
MANUAL OF NATURE 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. 
