COROLLA. 
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is in one piece or more ; for monopetalous flowers often have 
deep divisions, extending almost to the base of the corolla ; but 
they must be divided at the base,* or be in separate pieces, in or- 
der to be considered as polypetalous. It is a good rule, to con- 
sider the parts into which a corolla naturally falls, as so many 
petals. 
Monopetalous corollas, consist of the tube, throat and limb. 
The tube is the lower part, having more or less, the form of a 
tunnel. The throat, is the entrance into the tube ; it is either 
open, or closed by scales or hairs. The limb, is the upper bor- 
der of the corolla. 
Polypetalous corollas , present first different petals which 
form the whole corolla. Each petal consists of two parts, the 
claw and lamina, {See plate, 1. the dissected pink.) 
The claw is the lower part of the petal, and inserted upon 
the receptacle. It is sometimes very short, as in the rose ; in 
the Pink it is long and slender : it is analogous to the tube of 
monopetalous corollas. 
The lamina, is the upper, and usually the thinner part of the 
petal; its margin is sometimes entire, or without divisions, as 
in the rose ; sometimes notched, or crenale, as in the pink. The 
lamina corresponds to the limb of monopetalous corollas. - 
•The corolla is superior when it is inserted above the germ ; 
inferior, when below. regular when each division corres- 
ponds to the other^ The ra-ie and pink have regular corollas. 
When the parts do not correspond with each other, a corolla is 
irregular ; as in the geranium, pea, and labiate flowers. 
Different forms of Monopetalous Corollas. 
Monopetalous corollas may by their form, be divided as follow*! 
Fig. 18. 
1st. Bell-form, Fig. 18 ( campanulale , 
from campanula, a little bell ;) the tube 
is not very distinct, as the corolla grad- 
ually spreads from the base ; as in 
the blue bell, hair bell, &c. 
Forms of Monopetalous corollas — Bell-form — 
