278 TETRADYNAMIA SILIQUOSA. [CL. XV. 



inside of each of the outer, and one at the outside of each of the 

 longer pairs; anthers oblong. Germen cylindrical. Style very 

 short ; stigma knobbed. Pod nearly cylindrical, beaked ; valves 

 undulated ; partition membranous, the beak also often contains a 

 seed. Seeds nearly globular, arranged in one row. Name, sinapi, 

 used by the Greeks. 339. 



1. S. arvtnsis. Field Mustard, or Charlock. Pods with many angles, 

 knotty, longer than their awl-shaped beak ; leaves toothed, partly egg- 

 shaped, partly lyre-shaped. Root small, tapering, hard : stem from 



one to two feet, rough with reflected bristles, as are the leaves : flowers 

 greenish-yellow. Annual : flowers through the summer and autumn : 

 grows in corn-fields, abundantly. Eng. Bot. vol. xxv. pi. 1784. Eng. 

 Fl. vol. iii. p. 221. 990. 



2. S. dlba. White Mustard. Pods bristly, knotty, shorter than their 



two-edged beak ; leaves lyre-shaped. Stem rough, about a foot and 



a half high : flowers large, yellow. Eaten when young as salad. An- 

 nual : flowers in July : grows in waste places and corn-fields : frequent. 

 Eng. Bot. vol. xxiv. pi. 1677. Eng. Fl. vol. iii. p. 222. 991. 



3. S. nigra. Common Mustard. Pods closely pressed to the stalk, four- 

 cornered, smooth, with a short beak ; lower leaves lyre-shaped, upper 

 narrow lance-shaped, entire, smooth, stem from three to four feet high : 

 flowers yellow. Annual: flowers in June and July: grows in waste 

 places and fields : frequent. The common mustard used at table is ob- 

 tained from the seeds. It is also employed as a stimulant to the soles of 

 the feet in fevers, and to various parts of the skin as a rubefacient. Eng. 

 Bot. vol. xiv. pi. 969. Eng. Fl. vol. iii. p. 222. 992. 



4. S. incdna. Pods closely pressed to the stalk, turgid, with an egg- 

 shaped one-seeded beak; lower leaves lyre-shaped, hispid, upper be- 

 tween linear and lance-shaped ; stem much branched. The pod is 



either smooth, or hairy with a glabrous beak: seeds egg-shaped, com- 

 pressed. Biennial : flowers in July and August : found in the islands of 

 Jersey and Alderney by Mr. Babington. Brit. Fl. 4th ed. p. 257. 

 Prim. Fl.Sarn. p. 9. 993. 



5. S. Cheirdnthus. Wall-flower Mustard. Pods erect, cylindrical ; 



leaves all stalked, hairy, deeply pinnatifid. Stem hispid at the base : 



lobes of the leaves unequally toothed, those of the upper linear. 

 Biennial : flowers in July and August: discovered by Mr. Kabington on 

 the sea-shore in Jersey and Alderney, and described in his Flora of the 

 Channel Islands. Eng. Bot. Suppl. pi. 2821. Prim. Fl. Sarn. p. 9. 



994. 



6. S. tenuifolia. Narrow-leaved Wall Mustard. Pods erect, linear, 

 compressed, slightly beaked, on spreading stalks ; seeds in two rows ; 

 upper leaves lance-shaped, undivided, lower once or twice pinnatifid ; 



stem smooth. Stem erect, much branched, two feet high : flowers 



large, pale-yellow. The whole plant is acrid, and has a disagreeable 

 smell. Perennial : flowers from June to October : grows on heaps of 

 rubbish and old walls, about towns : not common. Eng. Bot. vol. viii. 

 pi. 525. Eng. Fl. vol. iii. p. 223. 995. 



7. S. murdlis. Sand Mustard. Pods ascending, linear, compressed, 

 slightly beaked, on spreading stalks ; seeds in two rows ; leaves sinuate ; 

 stem covered with reflected bristles. Stem about eight inches high ; 



