ORDERS. 29 



In the first order, Gymnos'permia, the Pericarp is 

 wanting, as in Wild-bahn, 

 (Melittis) fig. l,pl. 21. 



In the second, Angiospermia, it is present, as 

 in Fox-glove, (Digitalis) fig. 2. 



The two orders of the fifteenth class, (Tetrady- 

 naraia) are distmguished by the form of the 

 Pericarp. 



In the first order, Siliculosa, the Pericarp is a Sili- 

 cic, as in Shepherd's-purse, 

 (Thlaspi) fig. 3. 



In the second, Siliquosa, the Pericarp is a Si- 

 lique, as in Hedge-mustard, 

 (Erysimum) fig. 4. 



The orders of the sixteenth and seventeenth classes, 

 (Monodelphia and Diadelphia) are founded upon 

 the number of the stamens, as Triatidria, three 

 stamens, Pentandria, five stamens, and so on. 



The three orders of the eighteenth class, (Polyadel- 

 phia) are distinguished by the number and 

 situation of the stamens. 



In the first order, Dodecandria, there are twelve to 

 twenty stamens, unconnected 

 with the calyx. 



