SECOND ORDER SILIQUOSA. 139 



The Candytuft of the gardens (lberis) is at once 

 known by its irregular corolla, in which the 2 outer 

 petals are larger than the 2 others. 



THE SECOND ORDER SILIQUOSA. 



The plants of this order are known by producing 

 a long, slender, linear pod, as in the example of the 

 Wall-flower (Cheiranthus), which has a flattish, or 

 convex-sided, long pod, containing many flat seeds, 

 with a winged margin ; and a calyx whose 2 opposite 

 leaflets are gibbous at the base, occasioned by a 

 glandular toothlet on each of these sides of the germ. 

 The Stock-Gillyflower, among others, also belongs to 

 this showy genus, several of which are remarkable 

 for the beauty and fragrance of their flowers. It 

 is only distinguishable from the true Erysimum, by its 

 round, instead of quadrangular pod. 



The Radish (Raphanus) has a very peculiar, cy- 

 iindric, jointed, and swelling silique, which never 

 spontaneously opens ; and has a pair of glands be- 

 tween the shorter stamens and the pistil, and a second 

 pair between the longer stamens and the calyx. 



In the genus Jlrabis, or Wall-cress, some of them 

 common annuals, with white flowers, the silique is 

 linear, with the valves flat, and 1-nerved. The seeds 

 disposed in a single row ; the cotyledones accumbent ; 

 and the calyx erect. Most of the species grow in 

 dry fields or rocky hills, and are in flower from April 

 to June. 



In Hesperis (Dame's-violet or Rocket), of which we 

 have a common garden species (H. matronalis), with 

 purplish or white and fragrant flowers, very like to 

 those of the Stock-Gillyflower ; the silique is some- 

 what quadrangular, or 2-edged ; the stigma nearly 

 sessile, and formed of 2 connivent lobes ; the 



