202 TETRADVN. SIL1GL. 



16. SISYMBRIUiM. 



1. S. officinalc (common Hedge-Mustard), pods subulate pu- 

 bescent close pressed to the main stalk, leaves runcinate hairy, 

 stem hispid. Lightf. p. 354, and E. B. t. 735 (Erysimum off.). 



II AI. Waste places and byway-sides, plentiful. Fl. June, July. Q. 



One to two feet high, branched. The deep and cut or serrated lobes 

 are not always sufficiently decurved to be called runcinated; termi- 

 nal lobe very large, rounded in the lower leaves, oblong in the upper 

 ones. Flowers very small, pale yellow. 



2. S. Sophia (Flix-iveed), leaves doubly pinnate a little hairy, 

 pinnules linear terminal one the longest, petals shorter than 

 thecal. Lig/itf.p.3o4. E. B. i. 963. 



HAP,. Waste places, among rubbish, common. FL Aug. 0. 

 T-.vo feet high, branched. Pods linear, slender, erect, but not ap- 

 pressed, the footstalk being a little patent. 



17. ERYSIMUM. 



1. E. chelranlJioides (Treacle Hedge-Mustard), leaves lanceo- 

 late entire or slightly toothed with stellato-tripartite hairs, 

 pods nearly erect their peduncles spreading, stigma undivided 

 nearly sessile. Br. Lighlf.p.356. E.J3.t.942. 



HAD. Corn-fields, but not common, Sibbald. At the head of Lech 

 na Gaul, in Mull, Dr. Walker. Fl. July, Aug. . 



One foot to two feet high, branched. Mowers small, yellow. 



?. E. sjlliaria (GarLick- Hedge-Mustard), leaves" heart- shaped 

 petiolate dentato-crenate. Liglitf. p,356. E. B. t. 79(>. 



HAB. Hedge-banks and waste places. Fl. May, June. $ . 



Two to three feet high, branched. Leaves large, veined, well known 

 for their garlick-like smell. Flowers white. Fods erecto-patcnt. 



18. CHEIRANTHUS. 



1. Ch. fruticulosus (wild Wall-flower), leaves lanceolate acute 

 hoary beneath, pubescence all simple and close- pressed, stem 

 somewhat shrubby, branches angular. Sm. Ug/itJ. p. 357 

 (Ch. Clieiri). E. B. t. 1934. 



HAS. Old walls and castles, frequent. 1'1. May. I/ . 



One foot high, bushy. Leaves yellow, somewhat rigid, in which par- 

 ticulars the principal distinction rests between it and Ch. Chciri, Are 

 they truly distinct ? 



19. HESPERIS. 



1. II. matroridlls (Dame's Violet), stern erect, leaves ovate-lan- 

 ceolate toothed, limb of the petals obovate, pods erect toru- 

 lose their margins simple (not incrassated). E. B* 1. 731 

 (H. inodora). 



HAB. Banks and bushy places. Side of a ri\ 7 ulet near Glen Corse, 

 Lightf. Fields near Holytown, by Glasg., seemingly indigenous, 

 Ilop/c. Coliington and Auchiridenny woods, JMangh. Dank below 



