> 210 a THE STAMEN. 
413. When there are four, of which two are 
longer than the other two, they are called didy- 
namous, as in the most of the Scrophularinee — 
and Labiate. See Fig. 36. When there are 
six, of which four are longer than the other two, 
they are called tetradynamous, as in Wall-flower, 
and the rest of the Crucifere. See Fig. 26, 
page 101. 
_ 414, When the stamens are longer than the 
corolla, they are termed exserted ; included, when 
shorter. 
415. When they are united by their filaments, they are 
called monadelphous (Fig. 37), if they form a tube, asin — 
Mallow (Malva) ; diadelphous (Fig. 38), as in the Pea, and 
the rest of the-Leguminose ; triadelphous, polyadelphous, 
Fig. 38. 
according to the number of separate bundles or fasciculi into 
_ which they are formed. In Fig. 38, ais the pistil ; the other 
__ bodies are stamens, nine united, and one free; or in two sets 
or divisions (diadelphous.) . 
416. When the stamens are united by their anthers, they 
are called syngenesious, as in the Daisy, the Thistle, &¢-. 
__ This is the distinguishing character of the extensive natural 
_ 417. When they are incorporated with the pistil, they are 
~ -gynandrous, asin Orchis, and the rest of the Orchi- 
