THE CRUCIFER FAMILY. 



2. Perfoliate Pennycress. Thlaspi perfoliatum, Lian. 



(En 



Fig. 95. 



(Fig. 95.) 



g. Bot. t. 2354.) 



A glabrous annual, branching at the 

 base, or nearly simple, the stem ascend- 

 ing or erect, 3 to 6 inches high. Radical 

 leaves spreading or tufted, stalked, ovate 

 or orbicular ; upper stem-leaves ovate or 

 oblong, clasping the stem with rather 

 large, rounded auricles. Pods not half 

 the size of those of the field P., with 

 narrower wings, and the notch at the 

 top much broader and more open. Style 

 nearly as long, or longer than the notch. 

 Seeds usually 4 in each cell. 



In stony pastures and waste places, 

 chiefly in limestone districts, in central 

 and southern Europe, and temperate 

 Russian Asia. In Britain, apparently 

 confined to a few localities in Oxford- 

 shire and Gloucestershire. Fl. spring. 





3. Alpine Pennycress. Thlaspi alpestre, Linn. (Fig. 96.) 

 (Eng. Bot. t. 81.) 



A glabrous biennial or perennial, form- 

 ing a shortly-branched or tufted stock, 

 with obovate, oval, or oblong, stalked, 

 radical leaves. Stems simple, erect or 

 ascending, about 6 inches high ; the 

 leaves narrow, clasping the stem with 

 small auricles. Flowers usually larger 

 than in the two last. Pod about 3 

 lines long, but not so broad as in the 

 perfoliate P., especially at the base, the 

 wings rounded at the top, leaving a broad 

 but not a deep notch between them. 

 Style prominent. Seeds 6 or 8 in each 

 cell. 



In mountain pastures, in limestone 

 districts, in central and southern Europe, 

 extending northward to southern Swe- 

 den, and eastward to the Russian fron- 

 Fig. 96. tier. In Britain, chiefly in the north of 



