40 REGULAR, AND IRREGULAR COROLLA. 
of one piece, as in the Convolvulus (PLM Sed, t.), 
Foxglove, Snapdragon, Campanula (f. 12.), Primrose, 
when it is called a gamopetalous corolla, or a corolla 
with wnited petals. A petal usually consists of a short 
stalk called the claw, and the broad part the limb, as 
in the Pink, Sweet William (pl. 14. f. 1. c. claw, J. limb). 
48. In the gamopetalous, or monopetalous (petals 
united into one) corolla, the lower portion, that formed 
by the union of the claws of the petals, is called the 
tube of the corolla (pl. 18. f. 11. ¢.), and the upper 
expanded part (/.) is termed the limb; where the tube 
and the limb join, is the throat of the corolla. 
OF THE FORMS OF THE COROLLA. 
49. When the petals are of equal size, it is said to 
be a regular corolla; but if the petals vary in size, it 
is then called an irregular corolla. 
Of the regular polypetalous corolla, the following 
are the principal forms: the Roselike, or Rosaceous 
corolla, usually consisting of five petals, which spread 
widely in the form of a basin, and have a short claw 
(pl. 14. f. 2.). The Pink, or Clove-like, Caryophyl- 
laceous corolla, in which the petals are five, and have 
long claws, which, without uniting, form a kind of tube, 
at the upper part of which, the limb of the petal spreads 
out, as in the Pink and Sweet William (pl. 14. f. 3.). 
The Cruciform, or eross-like corolla is seen in the 
single Wallflower, Stock, Cabbage, &c. it consists of 
four petals only, which are placed two and two opposite 
each other, in the form of a Maltese cross (f. 4.). 
50. The irregular polypetalous corolla, is seen in 
