^0 TETRADYNAMIA— SILIQUOSA. Erysimum. 



a little branched, tinged at the bottom with a violet hue. Ra- 

 dical leaves the first year numerous, spreading on the ground, 

 lyrate, with a rounded toothed terminal lobe, being much like 

 the first species, but of a more neat and regular figure ; the 

 stem-leaves are often partly lyrate also, but the upper ones are 

 deeply and regularly pinnatifid, with parallel, linear-oblong, 

 bluntish, entire segments. FL fewer, smaller and paler than 

 those of B. vidgaris. Pods thrice as long as in that species, ex- 

 actly square, smooth. Style short, with a blunt, but not large, 

 stigma. 

 This species, undoubtedly very distinct from the foregoing, pro- 

 pagates itself abundantly by seed, but the root is not perennial. 

 It may be eaten like Water Cresses, with which it agrees in fla- 

 vour, except being rather more pungent. 



336. ERYSIMUM. Treacle-mustard. 



Linn. Gen. 339. Juss. 239. H. Br. 706. Comp.ed. 4. [OS. Br. 



in Ait. H. Kew. v. 4. 115. DeCand. Syst. v. 2. 490. Gartn. 



t.\43. 

 Alliaria. DeCand. Syst. v. 2. 488. 



Cal. very nearly equal at the base ; leaves oblong, concave, 

 erect, slightly coloured, deciduous. Pet. obovate-oblong, 

 obtuse, flat, their claws erect, the length of the calyx. 

 Filam. thread-shaped, simple, distinct, upright, with a 

 gland between the shorter one at each side, sometimes 

 also between the 2 longer ones, and the pistil. Anth. 

 roundish-oblong, rather spreading. Geiin. oblong, qua- 

 drangular. Style very short. Stigma small, capitate, 

 notched, permanent. Pod sessile, linear, equally qua- 

 drangular; valves concave, keeled, rectangular; parti- 

 tion membranous, crowned with the st2/le, and the more 

 or less deeply 2-lobed stig?na. Seeds ovate, w-ithout a 

 border, disposed in a single row ; cotyledons flat, incum- 

 bent. 



Herbs various in duration, erect, branched, either smooth, 

 downy, or finely bristly. Leaves simple, often lanceolate 

 and nearly entire. Fl. corymbose, yellow, sulphur-co- 

 loured, or white. Pods in very long upright clusters. 

 Quahties warm and pungent. 



1 . E>< cheirantkoides. Worm-seed Treacle-mustard. 



Leaves lanceolate, obscurely toothed, roughish with close 

 forked brisdes. Pods erect, on horizontal stalks. Stig- 

 ma almost sessile. 



E. cheiranthoides. Linn, Sp, PL 923. mild. v. 3. oil. Fl. Br. 



