204 TETRADYN. SILia. 



road leading from Leith to Queensferry-, near Bangholm ; and fields 

 near Forfar, G. Dun. Appin, Captain Carmichael. Fl. Aug. ©. 

 Boo/ fusiform, but slender. iS^e??i hispid, below. Flowers yellow. "Pod 

 upright, cylindrical, or obscurely 4-angular, veiny, the seeds form- 

 ing slight prominences ; the beak awl-shaj)ed, striated, square, at 

 its base." Sm. 



21. SINAPIS. 



1. S. arvensis [wild Mustard or Charlock) ^ pods with many 

 angles turgid and knotty longer than the two-edged beak, 

 leaves ovate sublyrate. Light/, p. 360. E. B, t 1748. 



Hab. Corn-fields, too frequent. H. Alay, June. 0. 

 One to two feet high, rough. Flowers rather large, yellow. 



2. S. alba {luhite Mustard), pods hispid turgid shorter than the 

 ensifornn beak, leaves pinnatifid. Light/, p. 361. E. B, 

 t. 1677. 



Hab. Waste places, frequent. Corn-fields about Edinb., Maugh. 

 H.July. ©. 



Stem 1 — \\ foot high, hairy. Lobes of the leaves variously cut and 

 toothed or erose. Floicers large, yellow. \^'ell distinguished by 

 its long beak. — This plant it is, which, in a young state, is eaten 

 under the name of Mustard, with Cresics {Lepidium sativum). 



3. S. nigra {common Mustard), pods appressed glabrous tetra- 

 gonous, style short subulate, upper leaves linear-lanceolate 

 entire glabrous. Light/, p. 362. E. B. t. 969. 



Hab. Under hedges and waste places. F/. June, ©. 



Three to four feet high. Lower leaves large, lyrate, rough. Flowers 

 yellow. Pod with a very short beak, or rather only the persistent 

 style and stigma at its summit, quadrangular, its surface scarcely 

 rugged. 



4. S. tenui/oUa {Jine-leaved Mustard), pods linear glabrous 

 shortly beaked erect, peduncles spreading,leaves lanceolate very 

 acute pinnatifid or bipinnatifid, stem glabrous. _E. B. t. 525 

 {Sisymbriutn tenui/.). 



Hab. Coast of Fife at St. Davids, Mr. P. Neill. Coast of Fife, be- 

 tween Burntisland and Queensferry, Mr. Greville. FL July, Aug. 



%. 

 Root thick, woody. Stent one or one foot and a half high. Leaves 

 with a very disagreeable smell. Flowers large, pale yellow, 



22. RAPHANUS. 



1. R. Rapha?iislrum {wild Radish or jointed Charlock), leaves 

 simply lyrate, pods of one cell jointed striated. Br. Light/, 

 p. 62. '£. B. t. 856. 



Hab. Corn-fields, frequent. Fl.. June, July. ©. 

 One to one foot and a half high. Leaves petiolate, rough. Flowers 

 yellow, veined. 



2. R. marilinius {Sea Radi'ih), leaves interruptedly lyrate, pod? 

 of one cell jointed seriated. E. B. I. 1613. 



