TETRADYN. SILICUL. 193 



19. HKSPERIS. Pod 4-sided or two-edged. Stigma nearly ses- 

 sile, with the lohes connivent. Cotyledons incumbent, plane. 

 Cal. closed. Br. 



20. BRASSICA. Pod 2-valved (with an abortive or 1 -seeded 

 beak). Cotyledons conduplicate. Cal. closed. Br. 



21. SINAPIS. Pod 2-valved (sometimes of 2 articulations, of 

 which the upper one is valveless) . Cotyledons conduplicate. 

 Cal. patent. Br. 



22. RAPHANUS. Pod valveless (torulose, Sm.). Cotyledons con- 

 duplicate. Cal. closed. Br. 



1. SILICULOSA. 



1. CAKILE. 



1. C. maritima (Sea Rocket], articulations of the pouch two- 

 edged the upper one sagittate, leaves pinnatifid subd ntate 

 fleshy. Br. Light/, p. 363, and E. B. t. 231 (Bunias Cakile). 



HAB. Sea-shores in sandy places; not uncommon. Leith sands, &c., 

 Lightf. E. coast from Aberdeen to Fraserburgh, Mr. Murray. Fl. 

 June, July. O- 



Plant bushy ; branches very crooked, succulent. Flowers, as in all 

 of this class, corymbose ; the corymbs in fruit lengthening into ra- 

 cemes, purplish. Pouch thick, fleshy, at length somewhat woody. 



2. CKAMBE. 



1. Cr. maritima (Sea Kale), the four longer filaments forked, 

 pouch pointless, leaves roundish sinuated waved toothed glau- 

 cous and as well as the stem glabrous. Br. Lightf. p. 364. 

 E. B. t. 924. 



HAB. Sea-coast in sandy or stony soils, but not common. Near 

 Fast-castle, Berwickshire, Lightf. Isle of Isla, Dr. Walker. Fl. 

 June. 7/ . 



Root thick, fleshy. Leaves large. Flowers white. Well known in a 

 cultivated state ; but rare, in Scotland, wild. 



3. CORONOPUS. 



1. C. Ruellii (Swine's Cress), pouch undivided crested with lit- 

 tle sharp points. Br. Light/, p. 345 (Cochlearia Coronopus). 

 E.B.t. 1660. 



HAB. Moist, clayey, exposed situations by road-sides, but not com- 

 mon, Sibbald. Road-side W. of Tobago-street, Edinb. ; at Burnt- 

 island, and at Seton Harbour, Maugh. Musselburgh, Mr. Arnott. 

 FL Aug. O 



A muclubranched, spreading weed. Leaves bipinnate, the segments 

 linear. Flowers very small, white, in lateral axillary corymbs. Pouch 

 large in proportion to the flower, curiously crested. 

 4. THLA8PL 



1. Th. arvense (smooth Mithndate Mustard, or Penny -Cress}, 



