126 
BIADELPHIA. 
receptacle; but the side and upper shorter divisions, 
which are'cloven; are interwoven with those parts of the 
wings, which most resemble them , in shape. The keel 
either consists of one petal, as in. cyti&us, or of two ad¬ 
hering together, as in sparlium, and is distinguished by 
its shape, as half-moon, spirally twisted, compressed, &c. 
The sides of the keel are shaped like those of the wings, 
and have a similar situation, only lower and more inward. 
The line that forms the keel runs straight as far as the 
middle, and then gradually rises in an arch, but the mar¬ 
ginal line runs straight to the end, where it obtusely 
joins the line of the keel. 
St a at i n a . Are most generally ten, (placed on the receptacle*) 
either all united at the base, as in the first distinction of 
the order decandria, or nine united, and one single; the 
united filaments enclose the pistillum, and the single 
filament is incumbent upon it.. The united filaments are 
membranaceous below the middle, being united into a 
cylinder, open or one side through its whole length; 
along which opening lies the tenth stamen, which is 
called the other set, and is often so closely attached to 
the nine, as not easily to be separated; the membra¬ 
naceous set of stamina separate upwards into nine distinct 
aw l-shaped filaments, bent like the keel, and of the same 
length, ionger and shorter by pairs: the single filament is 
avvfed, or bristle-shaped, simple, and bent as the other 
nine, but somewhat'shorter, and is detached from the rest 
at the base, to give vent on each side for the honey. 
The ant herd} numbered together are ten, one upon the 
single filament, and one upon each of the nine divisions of 
the united filaments, small, equal in size, terminating. 
PisTf i. litm. Single, placed upon the receptacle of the flower. 
The germen oblong, cylindrical, more or less compressed, 
as long as the cylinder of the united stamina, by which it 
• is involved, and sometimes, as in erythrina , &c. it is ele¬ 
vated by a slender footstalk issuing from the centre of the 
calyx. 
* Monadelphia, diadelphia , polyadelphia, and gynandria, are distinguished by 
the situation of the stamina; by which they approach nearer towards natural classes. 
