222 TETRADYNAMIA— SILIQUOSA. Sinapis. 



partly ovate, partly lyrate or hastate ; the uppermost sessile. 

 Calyx-leaves linear-oblong, quite horizontal, pale, or yellowish. 

 Pet. obovate, or inversely heart-shaped, bright yellow, turning 

 white in decay. Pof/s angular, rough with reflexed bristles, and 

 each terminating in a smoother, awl-shaped, furrowed beak, not 

 half so long as the pod itself, compressed at the base. Seeds 

 brown, serving as an inferior sort of Mustard, or rather to adul- 

 terate that made of S, nigra. 



2. S. alba. White Mustard. 



Pods bristly, rugged, spreading, shorter than their own flat 

 two-edged beak. Leaves lyrate. 



S. alba. Linn. Sp. PL 933. Willd. v. 3. 555, FL Br. 72 1 . Engl. 

 Bot. V. 24. t. 1677. Curt. Lond.fasc. 5. t. 46. Mart. Rust. t. 70. 

 Hook. Scot. 204. DeCand. Syst. v. 2. 620. Ft. Dan. t. 1393. 



Sinapi n. 4C6. Hall. Hist. v. 1. 203. 



S. album, siliqua hirsuta, semine albo vel ruffo. Baii Syn. 295. 

 Bauh. Hist. V. 2.858./. 



S. album. Ger. Em. 244./. 



S. primum genus. Fuclis. Hist. 538. f. 



S. hortense. Fuchs. Ic.307.f. 



S. secundum. Alatth. Valgr. u. 1. 515./. Camer. Epit. 333./. 



White Mustard. Pefiv. H. Brit. t. 45. f. 10. 



In cultivated as well as waste ground, by road sides, &c. 



Annual. June. 



Root tapering, small. Stem rough like the last, but with more 

 slender reflexed hairs. Leaves bright green, almost all lyrate, 

 toothed, roughish. FL numerous, yellow. Calyx-leaves linear, 

 green, horizontal. Pods spreading, on nearly horizontal stalks, 

 short, two-edged, very tumid from the prominent seeds, rough 

 with numerous, minute, reflexed bristles, interspersed with se- 

 veral larger, more spreading, or upright ones ; beak longer than 

 the pod, bristly, but more sparingly, curved upwards, sword- 

 shaped, striated, terminated by the short, compressed style and 

 cloven stigma. Seeds rather few, large, pale, yellowish brown, 

 well known as a delicate kind of Mustard. The late Mr. G. Don 

 observed them occasionally to assume a blackish hue. 



The young herb is used in salads, for which purpose chiefly it is 

 cultivated. 



3. S. nigra. Common Mustard. 



Pods quadrangular, smooth, slightly beaked, close-pressed 

 to the stalk. Lower leaves lyrate; upper linear-lanceo- 

 late, entire, smooth. 



S.nigra. Linn. Sp. PL 933. Willd. v. 3. 555. Fl.Br.722. EngL 

 BoLv.\4.t.969. Woodv.t.]5]. Mart. Rust. L 51. Hook. 

 Scot. 204. DeCand. SrjsL v. 2. 608. FL Dan. t. 1 582. 



