168 
ORGANOGRAPHY. 
BOOK 
upon the claw, and is a modification of the blade of a leaf. 
In many petals there is no claw, as in Rosa ; in many it is 
very long, as in Dianthus. When the claw is present, the 
petal is said to be unguiculate. In some unnaturally de- 
formed flowers the limb is absent, as in the garden variety 
of Rose, called R. OEillet, 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 \ery small; the liliaceous 
(Jig. 71.) has its claws gradually dilating into a limb, and 
standing side by side; a caryophyllaceous 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 hutterjly-sliaped, (Jigs. 98, 99.); in 
this there are five petals, of which the 
upper is erect and more expanded than 
the rest, and is named the standard or 
vexillum ; the two lateral are oblong, 
at right angles with the standard, and 
parallel with each other, and are called 
the icings or alee; and the two lower, 
shaped like the wings and parallel with 
them, cohere by their lower margin, 
and form the keel or carina. The winos 
O 
were formerly called talarce by Link, and 
the keel scapliium by the same author. 99 
When the corolla is very small, or when it forms a part 
of a capitulum, it is called corollula : that of a floret is so 
called. 
