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TE'PRADYNAMLIA. STLIQUOSA. 69 
462. CHETIRANTHUS. L. (Wall-flower. Stock.) 
Calix closed; 2 of the leaves gibbous at the 
base. Petals dilated. Disk of the germ biglan- 
dulous. Siligue compressed or terete. Stigma 
bilobed. Seeds flat, sometimes marginated. 
Herbaceous or suffruticose; leaves more or less pubes- 
cent, entire or pinnatifid; flowers yellow or purple, large, 
r and often odorous. A genus very nearly allied to Hespe- 
, rts and to the entire leaved species of Erysimum, exclud- 
ing E. Alliaria. 
Seecies. 1. C. Paillasii. Pa.—North West Coast. 2. 
*asper. Stem simple, and acutely angular; leaves canes- 
| cently pilose, sublinear, entire, margin acculeately and re- 
trorsely asperate, radical fasciculated attenuated-sublan- 
_ceolate, acute, retrorsely toothed; silique very long quad- 
: rangular and divaricate; claws of the petals longer, than 
é the calix. Cheiranthus erysimoides. Pa. Has, On the 
bE _ Plains of the Missouri, commencing near the confluence 
of White river. Fl June. Ozs. Biennial. Stem 12 to 
18 inches high, mostly simple, but now and then branch- 
or gos the summit. Leaves ty where Serie 
with white, short, retrorse, strigose spressed hairs; 
_ Margin aculeolate, stem leaves cote 2 or 3 lines 
wide and 2 inches long. Flowers very similar to those 
of C. Cheiri, and ‘almost equally odorous. Calix. 
2 of the leaves distinctly gibbous at the base. Petals 
lated, claws long, limb broad. obovate, bright yellow. 
Stigma bilobed. Silique 2 or 3 inches long, spreading, 
4-sided, 2 of the angles asperate. 
A genus of about 49 species, indigenous to Europe and 
the temperate and colder parts of Asia and Africa in both 
hemispheres. ° : 
463. HESPERIS. L. (Rocket) 
Calix closed, shorter than the claws of the 
petals. Petals for the most part obliquely bent, 
linear or obovate. Silique subterete. Lobes of 
the stigma connivent. Seeds immarginate. 
Nearly allied to the preceding genus, having also 2 of 
the calix leaves gibbous at the base, and a gland at the 
inner base of the.2 shorter stamina. Stigmain some spe- 
- cies sagittate at the base. Mer eee 
Specres. 1. H. pinnati Leayes ovate-lanceolate, 
‘shurply toothed, nearly Sodcaeue and_radical subpin- 
