102 Seuorno wen, 
standard : the next two are the ale, or wings : and the other 
two form the carina, or keel. This kind of corolla is found 
in the Pea and Bean, and the greater number of the Legu- 
minose. It is called papilionaceous from having a resem- 
blance to a butterfly with expanded wings. See Fig. 28, in 
which a is the vexillum, 6 the ala (of which there are two), 
and ¢ the carina, or keel; Figs. 29, 30, , one ala, ¢, the 
keel ;—and Fig 31, the vexillum. : 
Fig. 28, Figs. 29, 30. Fig 31. 
373. The other forms of eet polypetalous corolla, as 
in the Monk’s-hood (Aconitum), Larkspur (Delphinium), 
Violet, &c., are incapable of being reduced to any order. _ 
374. The petals generally alternate with the sepals, that 
is, each petal is opposite to the space between the two sepals, 
not toasepal. This is well seen in the Crucifere. %&@ 
: ~~ sia 20 
7 Compound Flowers. 
875. Tuer is a class of flowers which in many points 
_ differ so much from the generality of flowers, that they Te 
quire to be separately noticed. They are called compound, 
_ because what appears to be one flower consists of a great 
_ number of florets or little flowers, sessile on one 
called phoranthus, and occasionally very different from each 
