112 
THE FIRST BOOK OF BOTANY. 
Corolla-Tubes may be long or short, slender or 
swollen, tapering or cylindrical, or with a pouch, or 
sack, on one side. 
The Lime may be narrow or broad, erect or spread¬ 
ing ; and 
The Throat may be open or constricted, hairy or 
smooth. 
Note these features in describing gamopetalous 
corollas. 
The following are the principal kinds of regular 
gamopetalous corollas: 
Tu'bular.— A tubular corolla is one in which the 
tube spreads little or none at the border. Fig. 183. 
Fig. 183. Fig. 184. 
Tubular. Urceolate. 
Fig. 185. 
Ur'ceolate.— A corolla is urceolate when the tube 
is swollen in the middle, with a narrow opening like 
an urn, as in Fig. 184. 
