CRUCIFEROUS TRIBE 



19 



received from having been " formerly used in the Mithridate confec- 

 tion, an elaborate hodge-podge now laid aside." Sir E. J. Smith. 

 The flowers are white, and very small in comparison with the 

 pouches. Fl. all the summer. Annual. 



2. T. perfoliatum (Perfoliate Penny Cress). Pouch inversely 

 heart-shaped, not so large as in the last, and with smaller wings ; 

 style shorter than the notch of the pouch ; seeds 3-4 in a cell, 

 smooth ; stem-leaves oblong, heart-shaped at the base, clasping 

 the stem ; height up to 6 inches. Limestone pastures in Oxford- 

 shire and Gloucestershire, but rare. Flower 

 white. Fl. April, May. Annual. 



3. T. alpestre (Alpine Penny Cress). Pouch 

 inversely heart-shaped ; style longer than the 

 broad notch of the pouch ; seeds numerous ; 

 stem-leaves narrow and clasping the stem ; stetn 

 simple, about 6 inches high ; flowers white, 

 rather larger than in the two foregoing. Moun- 

 tainous limestone pastures in the north of Eng- 

 land, rare. Fl. June, July. Perennial. 



2. Capsella {Shepherd's Purse) 



Capsella Bursa i. C. bursa Pastoris (Common Shepherd's 



P HZ\ C T Purse). The only species. A common weed, 

 to be found in almost every part of the world, 

 varying considerably in luxuriance, according 



to soil and situation. In stony ground it 



grows only a few inches high, but in rich soil 



as much as 2 feet. The whole plant is more 



or less rough with hairs ; the root-leaves are 



pinnatifid, those on the stem oblong, toothed, 



and arrow-shaped at the base. Fl. nearly the 



whole year round. Annual. 



Shepherd's Parse) 



Site 



3. HUTCHINSIA 



I. H. petrcea (Rock Hutchinsia). The only 

 British species. A pretty little plant, 2-3 

 inches high, growing on limestone rocks in 

 several parts of England and Wales. The 

 leaves are pinnate ; flowers minute, petals Hutchinsia Petr.t-a 

 white, scarcely longer than the calyx ; the (Rock Hutchinsia) 

 seeds 2 in each cell. Fl. March, AdHI. Annual. 



