TETR ADYNAMIA SILICULOSA. Cochlearia. 185 



T. perfolidtum. Perfoliate Shepherd^s Purse. Pouch 

 inversely heart-shaped. Stem-leaves heart-shaped, 

 rather sharp at the base, clasping the branched stem. 

 Style very short. E. B. 2354. H. L. 46. T. rotun- 

 difolium. G. E. %m. 



Limestone pastures. * * Old stone quarries between Burford 

 and Witney ; Burford Downs. Sb., and Hooker. 1818. 



An. April. 



Stem in a rich soil branched from, the bottom ; four to six inches, 

 spreading, smooth, leafy. Ls. glaucous, smooth, shghtly 

 toothed : root-Is. stalked, egg-shaped, blunt ; the rest alternate. 

 Fl. white, small, not much longer than the cal., heads close, 

 cor^^mbose, gradually lengthened into long clusters of seed- 

 vessels. Pouch crowned with the sticjf. Cal. purplish. 



T. Bursa Pastoris. Common Shepherd's Pursed 

 Hairy. Pouch inversely heart-shaped, not bordered, 

 somewhat triangular. Root leaves wing-cleft. E. B. 

 1485. C. 1. 50. Bursa Pastoris. G. E. 276. 

 Capsella genus, of DC. 



Waste, and cultivated ground, way sides. 



An. April. 



Root branched. Stem variable in height, branched, leafy. Fl. on 

 branches, a corymb, and at length shooting into a spike-like 

 bunch, small, white. Ls. root-Is. spreading, generally sharply 

 toothed : stem-Is. oblong, stalkless, stem clasping, their base 

 spear-arrow-shaped. Pouch margin scarcely dilated, crowned 

 with the style. Seeds pendent. 

 The seeds and young ii. eaten by birds : plant found in almost 



every part of the globe. Ls. root-ones sometimes entire. Plant 



diseased by a minute, white, parasitic fungus, Uredo Thlaspi. 



Taste not pungent. 



COCHLEA'RIA. Scurvy-grass. (Horse Radish.) 



(C. officinalis. Common Sc. Gr. Root leaves roundish ; 

 stem-leaves oblong, stalkless, sinuated. Pouch round. 

 E. B. 551. H. L. 148. C. rotundifolia. G. E. 401. 



Rocks and muddy places by the sea-coast, as also upon high mountains. 



Packington, Warwickshire. Tur. 

 An. May. 

 Ls. succulent, smooth, shining. Fl. white, in corymbose tufts. 



Pouches obscurely veined, style-tipped.) 



* C. Armordcia. Horse-radish. Root leaves oblong, 

 notched ; those of the stem lengthened out, spear- 



' From the shape of the poMc/t. 



