TETRADYNAMIA— SILIQUOSA. Cheiranthus. 203 



Cal. converging, compressed ; leaves oblong, concave, erect, 

 deciduous, 2 opposite ones protuberant at the base. Pet. 

 obovate, spreading, entire or slightly notched ; claws 

 ei'ect, the length of the calyx. Filam, awl-shaped, pa- 

 rallel, simple, distinct, each of the 2 outermost, or short- 

 est, embraced at the bottom by a nectariferous gland. 

 Antli. erect, oblong-ari'ovv-shaped, acute, of 2 linear lobes. 

 Germ, linear, compressed, a little tumid at each side, the 

 length of the stamens. Stijle short, nearly cylindrical. 

 Stigma either of 2 thick spreading lobes, or capitate and 

 slightly notched, permanent. Pod linear, compressed, 

 two-edged, rather convex at the sides, mostly with an 

 elevated, longitudinal, central line ; valves straight ; par- 

 tition membranous. Seeds ranged alternately, in a single 

 row, ovate, compressed, slightly bordered at the summit, 

 and often at one side also ; cotyledons accumbent. 



Biennial or perennial, herbaceous or somewhat shrubby. 

 Stem branched, leafy, round, or slightly angular. Leaves 

 lanceolate, entire or toothed. Pubescence close, simple, 

 or divaricated, or somewhat starry. Fl. handsome, fra- 

 grant, yellow, purplish, or white, often particoloured, or 

 changeable. Ch. tenuifolius of DeCandoUe has a slight 

 border at the top of the seed only. 



1. Qh.fruticulosus. Wild Wall-flower. 



Leaves lanceolate, acute ; most hoary beneath, with simple 

 close hairs. Stem shrubby. Branches angular. Style 

 prominent. 



Ch. fruticulosus. Linn. Mant. 94, Willd. Sp. PL v. 3.516. FL 



Br. 709. EngL Bot. v. 2/. t. 1934. Comp. ed. 4. 1 13. Hook. 



Scot. 202. Galp. Comp. 56. Davies Welsh BotanoL 64. 

 Ch. Cheiri. Huds. 287. With. 586. Relh. 260. Sihth. 202. Abbot 



144. Hook. Lond. ^. 147 ? DeCand. SysL v. 2. 180, var. /x,. 

 Leucojum n. 443. HalL Hist. v. 1. 193; from Mr. Davall and 



others. 

 L. luteum, vulgo Cheiri, flore simplici. Raii Syn. 291. Bauh. Hist. 



V. 2. 572./. reprinted in Chabr. Ic. 278. f. 4. 

 L. luteum minus fruticans. BarreL Ic. t. 1228. 

 Viola petrsea lutea. Tabern. Krauterb. 688./. 



On old walls. 



Shrub. April, May. 



Stem shrubby, erect, bushy, branched in a determinate manner ; 

 branches angular, leafy, hoary with close, bristly, silvery hairs, 

 chiefly directed downward, hke those'on both sides of the leaves; 

 though some point the contrary way, on the leaves as well as 



