266 FUMARIACEiE.—CRUCIFER^. [part ii. 



base ; they are two-valved and two-celled. 

 The leaves are glaucous, and finely cut. There 

 are three species, or perhaps varieties, which 

 differ principally in the degree of enlargement 

 of the receptacle or disk. They have all large 

 fleshy roots, which bleed copiously if wounded, 

 and for this reason the plants are difficult to 

 remove unless when quite young. 



ORDER XII. FUMARIACE^.— THE FUMITORY TRIBE. 

 The flowers of plants of this order are so 

 peculiar in their shape, as when once seen to be 

 easily remembered. There are two small 

 sepals, which soon fiill off*, and four petals of an 

 irregular shape, two of them being drawn out 

 into a kind of spur. There are six stamens, and 

 the fruit is silique-formed. The plants have 

 somewhat of a smoky smell, and when broken 

 yield a watery juice. The principal genera are 

 Fumaria, Corydalis, and Diclytra. 



ORDER XIII. CRUCIFER.?^.— CRUCIFEROUS PLANTS. 



The Cruciferous plants form so natural an 

 order, that when one of them has been de- 

 scribed the others may be easily recognised. 

 They have all a separate calyx and corolla, each 



