25G TETRADYNAMIA — SILIQUOSA. ISinapis. 



Cliffs by the sea : Devonshire, Dover, Wales, Cornwall, Yorkshire, 

 and in the Firth of Forth. Fl. May, June. ^ . — Varying in height, 

 1—2 feet. Leaves thick, subcarnose, the upi)erniost undivided, but 

 toothed. Floivers large, yellow. — Tlie origin of our garden Cabbcuje. 



4. Jj. Monensis, ^v. (^Isle-of-3Iaii Cabbaye) ; leaves pituiatifid, 

 steinnearly leafless glabrous, pods smooth, beak, l-( — 3)-seeded. 

 Sisr/mbrimn, L. — E. Bot. I. 962. 



On the isles and shores of the Clyde, and on both sides of the Irish 

 Channel. In Lorn, Scotland. Fl. June, July. If. — Stems prostrate, 

 slightly hispid, g-reedily eaten by cattle and sheep, and probably deserv- 

 ing: of being cultivated as fodder. 



5. B. Cheiranthvs, Vill. ( Wall-Jiower Cabbage) ; leaves stalk- 

 ed hispid all deeply pinnatifid, lobes oval-oblong luieqiially tooth- 

 ed in the upper one linear, base of the stem hispid, pods cylin- 

 drical the valves 3-nerved, the beak 1 — 2 seeded. DC. — Bot. 

 Gall. i. 51. Bub. Prim. FL Sam. ined. 



Sands of St Aubin's bay, Jersey. Babington and Christy. Fl. July, 

 Aug. $ ? — The seeds in the rostrum distinguish this plant from all the 

 British species, except B. Monensis ; but that has nearly a leafless gla- 

 brous and usuall}' prostrate stem. In this plant the stems are upright. 

 Babington . 



6. B. campestris, L. (^common icild Navew) ; root and stem 

 slender, leaves cordate acuminate amplexicaul, lower ones lyrate 

 dentate subhispid. E. Bot. t. 2234. 



Corn-fields, and sides of rivers and ditches, in many places. Fl. June. 

 July. 0. — i?t<o^ fusiform, but slender. Stem hispid below. Flowers 

 yellow. Pod upright, cylindrical or obscurely 4-angular, veiny ; seeds 

 forming slight prominences ; beak awl-shaped, striated. 



29. SiNAPis. Linn. Mustard. 



1. S. arvensis, L. (wild Mustard, Charlock) ; pods with many 

 angles turgid and knotty longer than the two-edged beak. E. 

 Bot. t. 1748. : 



Corn-fields, too frequent. — 



" O'er the ynuiitf corn the Charlock throws a shade. 

 And clasping Tares cling round the sickly blade." 



Fl. May, June. 0. — 1 — 2 ft. high, rough. Flowers xaihex large, yellow. 



2. S. alba, L. (white Mustard) ; pods hispid turgid shorter 

 than the ensiform beak, leaves pinnatifid. E. Bot. t. 1677. 



Waste places, frequent. Fl. July. 0. — Stem 1 — \^ foot high, hair}'. 

 Lobes of the leaves variously cut and toothed, or erose. Flowers large, 

 yellow. Well distinguished by its long beak. — This plant, while in a 

 young state, is eaten under the name of 3Iustard, with Cresses {Lepi- 

 dium sativum.') 



3. S. nigra, L. (common Mustard) ; pods appressed glabrous 

 tetragonous, style short subulate, upper leaves linear-lanceolate 

 entire glabrous. E. Bot. t. 969. 



Under hedges and in waste places. Fl. June. ©. — 3 — 4 ft. high. 

 Lower leaves large, lyrate, rough. Flowers yellow. Pod with a a ery 

 short beak, or rather only the persistent s(i/le and stigma at its summit, 



