156 Class XV. Order L 



TETRAD YNAMIA. 



SILICULOSA. 



192. LEPIDIUM. 

 LEPIDIUM VIRGINICUM. Jr. Wild cress or peppergrass, 



Radical leaves pinnatifid ; stem leaves linear- 

 lanceolate, serrate ; flowers with four petals and 

 two stamens ; silicle lenticular. Mich. abr. 



Syn. THLASPI VIRGINIANUM. Pair. 



Frequent by road sides, flowering during most of the sum- 

 mer and autumn. Stem woody and branching, round, smooth. 

 Branches numerous, alternate. Leaves of the root pinnatifid, of 

 the stem lanceolate, glabrous, furnished with a remote tooth or 

 two. Racemes terminal, long, naked. Pedicels capillary. 

 Flowers very small, diandrous, white. Silicles flat, orbicular, 

 with a deep notch in the end. Taste like common Garden 

 cress or peppergrass. 



193. THLASPI. 

 THLASPI BURSA PASTORIS. L. Common Shepherd's purse. 



Hairy, silicle inversely heart shaped, somewhat 

 triangular ; radical leaves pinnatifid. Sm. 



Equally common with the last, in pastures and road sides, 

 continuing to flower during most of the vegetating season. Stem 

 branching, round. Root leaves numerous, spreading, pinnatifid, 

 toothed, somewhat hairy. Stem leaves oblong, toothed, arrow 

 shaped at base, closely sessile. Flowers small, white. Silicic 

 smooth, inversely heart shaped, crowned with the short style. 

 Annual. 



