CHAP. II. 
COROLLA. 
141 
is the narrow part at the base which takes tlie place of the 
foot-stalk of a leaf, of which it is a modification ; the limb is 
the dilated part supported upon the claw, and is a modifica- 
tion of the blade of a leaf. In many petals there is no claw, 
as in Rosa j in many it is very long, as in Dianthus. When 
the claw is present, the petal is said to be unguiculate. In 
some unnaturally deformed flowers the limb is absent, as in 
the garden variety of Rose, called R. CEillet, in which the 
petals consist wholly of claw. 
According to the manner in which the petals of a polype- 
talous corolla are arranged, they have received different names, 
which are thus defined by Link : — the rosaceous corolla 
(Jig. 97.) has no claw, or it is very small ; the liliaceous 
(Jig* 72.) has its claws gradually dilating into a limb, and 
standing side by side ; a cargophyllaceous has long, narrow, 
distant claws ; the alsinaceous has short distant ones ; the 
cruciate flower has four valvaceous sepals, four petals, and six 
stamens, of which two are shorter than the rest, and placed 
singly in front of the lateral sepals, and four longer, and 
standing in pairs opposite the two other sepals. If the corolla 
is very irregular, with one petal very large and helmet-shaped, 
or hooded, as in Aconitum, it is sometimes called cassideous ; 
if it resembles what is called labiate in monopetalous corollas, 
it is termed labiose. The corolla of the Pea, and most Legu- 
minous plants, has received the fanciful name of papilionaceous 
or butterfly-shaped (flgs, 98, 99.) ; in 98 
this there are five petals, of which the 
upper is erect and more expanded than 
the rest, and is named the standard or 
vexillum (etendard, Fr.) ; the two late- 
ral are oblong, at right angles with the 
standard, and parallel with each other, 
and are called the wings or alee (ailes, 
Fr.) ; and the two lower, shaped like 
the wings and parallel with them, co- 
here by their lower margin, and form 
the keel or carina (carene or nacelle, 
Fr.). The wings were formerly called 99 
talarce by Link, and the keel scaphium by the same author. 
