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CLASS MONADELPHIA. 
erations derived from the number and comparative length of the 
stamens ; the one class having four and the other six stamens of 
varying lengths. Both classes we found to have two orders, 
not as in the preceding classes, depending upon the styles ; but 
in the one class, on the situation of the seed as lying in the ca- 
lyx, or enclosed in a seed vessel ; in the other class, from the 
comparative length of the pericarp or pod. 
LECTURE XXXIII. 
CLASS XV MONADELPHIA. 
We are now to consider the brotherhoods , as the names of 
the 15th classes signify; Monadelphia meaning one, and Diadel- 
phia two brotherhoods, in allusion to the manner in which the 
filaments are connected in one or two sets. The orders in this 
class are arranged according to the number of stamens ; a char- 
acter which distinguishes the first ten classes : but no confusion 
arises from taking the same character in these classes to distin- 
guish the orders, since in the classes themselves the number of 
stamens is not reckoned as a mark of distinction. 
CLASS MONADELPHIA. 
In this class we include all such plants as have their filamevts 
united in one set, forming a tube at the bottom of the corolla. 
In this union of stamens, this class differs from all the preceding 
ones ; for in those we found the stamens entirely separate ; in 
this, you will observe that the anthers are separate, although 
the filaments are joined. We cannot in this class, as in the two 
preceding ones, point out any prevailing form of the corolla ; 
the mark of distinction here is in some cases rather doubtful, 
the filaments being sometimes broad at their base, and yet, not 
entirely connected. 
You will recollect that the orders here, depend upon the num- 
ber of stamens. We have no first order here, for the character 
of the class is united filaments , and one filament or stamen 
could not possess this requisite of union. 
The Third Order is the first which occurs ; this is called 
Triandria, which you know is the name of the third class, and 
signifies three stamens. But here are three stamens united by 
their filaments into a tube. We find in this order a handsome 
General character of the classes — Monadelphia and Diadelphia — Class 
Monadelphia, character of the class — Orders — Order Triandria. 
