42 



CRUCIFEK.E. 



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 it attains two feet. It was known to the ancients 

 by the name of Thlaspi, but has recently been separated 



CAPSELLA BURSA-PASTORIS (Common Shepherd's Purse) . 



from that genus, on account of its wanting the cha- 

 racteristic winged valves. 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. 



