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DIADELPHIA. 
Calyx. A perianthiutn of one leaf, bell-shaped, withering, 
base gibbous, the lower part annexed to the fruit-stalk, 
the upper part blunt, containing honey; the rim five 
teeth, sharp, erect, oblique, unequal; the lower tooth lon¬ 
ger than tlue rest, the upper four stand in pairs, of which 
the uppermost pair is mostly shorter, and stands further 
asunder. The bottom of the calyx including the recep¬ 
tacle may be deemed the nectarium , as it is moistened 
with a sweet liquor. 
Corolla. Papilionaceous, unequal, each petal having a 
distinct name, (viz.) 
The standard, (vexillum) which is the petal covering the 
rest, incumbent, greater, flat, and horizontal; inserted by 
its claws in the upper margin of the receptacle, approach¬ 
ing to a circular figure when it leaves the calyx, and 
nearly entire; an elevated line or ridge marking it length¬ 
ways, particularly towards the top, as if the sides were 
depressed. The part of the petal nearest the base is 
nearly the form of half a cylinder, embracing the parts 
that fie under it; the surface of the petal is depressed on 
each side, but the sides nearest to the border are reflexed; 
and at the unfolding of the half cylinder, are generally 
two concave appendages, resembling ears, prominent on 
the under side, compressing the wings which lie beneath 
them. 
The wings (alae) are two equal petals, one on each side 
of the flower, placed under the vexillum’; inner borders 
incumbent to each other and parallel, broader outward, 
the upper margin straighter, the lower more dilated into 
a roundish form; the base of each wing is cloven, the 
lower division being lengthened into a claw, inserted into 
the side of the receptacle, and is about the length of the 
calyx; the upper division is shorter and indexed. 
The keel (oarina) is the lowest petal enclosing the stamina 
and pistillum,generally divided, placed under the standard, 
and between the wings, it is boat-shaped, concave, com¬ 
pressed on the sides, placed in the position of a vessel 
afloat, lessened at the base, the lower part extending 
into a claw as long as the calyx, and inserted into the 
