ORD. II.] 21. EllYSIMUM CIIEIIIANTIIOIDES. 405 



OllDEll II. 

 Siliquosa, with long extended Siliquse. 



Erysimum cheiraiitlioides, L. 



Leucoienar tiger Hederich, Schotendotter. — French, Velar 

 girqflee. — Engl. Treacle hedge-mustard. — Swed. Aker- 

 rym. 



This plant, the fibrous root of which lasts two years, is 

 pretty common among the shrubs of our pastures, in mea- 

 dows and moist fields. Its somewhat angular, branched, 

 erect, leafy, herbaceous stem is furnished with numerous ac- 

 cumbent sharp hairs. The leaves of the stem stand alternate, 

 are lanceolate, without stalks, or lengthened into the leaf- 

 stalk, generally two inches long, and half an inch broad, fur- 

 nislied with indistinguishable, scattered teeth on the margin, 

 which almost entirely disappear in the upper leaves. The 

 surface appears smooth to the naked eye ; but with a glass we 

 observe small, contiguous, three-pointed hairs. The branches 

 stand open, and carry rich bunches of flowers ; the individual 

 flower-stalks are a line and a half long; at first they are 

 erect, afterwards, when the fruit has ripened, they become 

 horizontal. The calyx consists of four lanceolate, erect, yel- 

 lowish-green pieces, furnished with a membranaceous margin : 

 the corolla consists of four spoon-shaped, more or less emar- 

 ginated yellow petals, somewhat longer than the calyx. The 

 filaments are six in number, four of which are longer than 

 the other two ; but they are all as long as the pistillum, and 

 as the claws of the petals. The anthera? are oval, yellow, 

 and bilocular. The nectaries stand at the base of th^ fila- 

 ments, those on the shorter filaments being half ring-shaped, 

 ihose on th,e longer crenated. After floM^ering, both the si- 



