19(5 TETRADYNAMIA— SILIQUOSA. Sisymbrium. 



Erysimum. Toiini. /.111. 



Cal. nearly equal at the base, somewhat .spreading; leaves 

 oblong, concave, slightly coloured, deciduous. Pet. obo- 

 vate-oblong, obtuse, undivided, flat ; claws nearly the 

 length of the calyx. Filam. thread-shaped, simple, dis- 

 tinct, erect. Anth. oblong-heart-shaped, a little spread- 

 ing. Germ, linear, slender, sessile. Style very short. 

 Stigma capitate, notched, permanent. Pod linear, round- 

 ish, or slightly angular ; valves linear, concave, wavy ; 

 partition narrow, membranous. Seeds I'anged alternately, 

 forming a single row, numerou.s, small, ovate, or oblong, 

 not bordered ; cotyledons flat, incumbent, sometimes 

 (according to Mr. 13rown) obliquely. 



Annual or perennial he7'b$, very various in foliage. Ft. yel- 

 low or whitish, mostly small. Pods erect, in very long 

 clusters. Flavour pungent, not fetid. 



1. S. offic'male. Common Hedge-mustard. 



Pods pressed close to the main stalk, awl-shaped, downy. 

 Leaves runcinate, hairy. Stem rough with reflexed 

 bristles. 



S. officinale. Hcoy. Cam. ed. 2. v. 2. 26. Br. in Ait. H. Kew. v. 4. 



111. DeCond. Sysl. v. 2. 459. Comp. cd. 4.112. Hook. Scot. 



202. 

 Erysimum officinale. Linn. Sp. PL 922. IVilld. v. 3. 509. Fl. Br. 



70G. Engl. Bot. v.W.t. 735. Curt. Lond.fasc. 5. <.50. Woodv. 



suppl. t. 244. Fl. Dan. t. 560. Bull. Fr. t. 259. 

 E. n. 478. Hall. Hist. v. 1 . 208. 

 E. Dioscoridis Lobelii. Ger. Em. 254./. 



E. vulgare. Bauh. Pin. 100. Moris, v. 2. 218. sect. 3. i. 3./. 1 . 

 Eruca hirsuta, siliquil cauli adpressa. Erysimum dicta. Bail Syn, 



298. 

 Verbena foemina. Trag. Hist. 102./; but not of Brutifelsiiis. 

 V. recta sive mas. Fuchs. Hist. 592. f. 

 Irio sive Erysimum Dioscoridis. Lob. /c. 206./. Dod. Pempt, 



7\4.f. 

 Hedge Mustard. Pefw. H. Brit. t. 46./ 3. 

 In waste ground, by road sides, and on banks, common. It 



springs up wherever houses have been burnt, as Haller records. 

 Annual. June, Juhj. 

 Herb of a dull green, minutely hairy, or downy. Stem solitary, 



2 feet high, erect, with numerous horizontal branches, leafy, 



round, clothed with fine deflexed bristles. Leaves lyrate, their 



lobes runcinate, unequally toothed ; the upper ones narrowest. 



Fl. pale yellow, small, in little corymbose heads, soon becoming 



very long .straight close clusters, of erect^ tapering pods, finely 



