j 
4 PRINCIPLES OF BOTANY, ETC. 
tals the following names have been given: (for i- 
stances examine the flowers of the common pea, 
Pisum sativum, or vetch, Vicia sativa, fig. 105, 20.) 
a. Vhe standard, (vexillum), is the uppermost 
petal, which is commonly the largest, and is 
somewhat cencaye, fig. 106. 
‘Che two wings, (¢/@), are the two petals 
which stand under the vexillum, and oppo- 
site to each other on each side, fig. 107. 
The keel, (carina), is the undermost petal ; 
itis hollew, and stands. under the vexillum,, 
and opposite to it; and contains the germen, | 
with the stamina and pistillum, fig. 108. 
8. Orchideous, (orchidea), is a corolla composed 
of five petals, of which the undermost is long and 
sometimes cleft ; the other four are arched and bent 
towards one another, fig. 33. 
9. Irregular, (irregularis), consisting of four or 
more petals, which are of different lengths and in- 
clination, so that they, do net come under the, de- 
scription of the other kinds, fig, 134. 
So 
& 
§ 77. 
Vhe particular parts of the corolla have besides 
appropriate names. ‘The following are those of the 
MONOPETALOUS COROLLA : 
1. The tube, (tubus), of a monopetalous corolla is 
the under part, which is hollow, and in general of 
equal thickness, All flowers of this kind of co- 
rolla have a tube, except the bell-shaped, and some- 
times the wheel-shaped. 
2. ‘Uhe border, (/imbus), is the opening of the corol- 
la, 
