TETRADYNAMIA. SlLiqUOSA. 6$ 



462. CHEIRANTIIUS. L, (\Yali-ilo\ver. Stock.) 

 Ccillx closed; 2 of the leaves gibbous at the 



base. Petals ililatt d. Disk of the germ biglan- 

 diilous. >Sii2^iie 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, 

 and oJten odorous. A genus very nearly allied to HespC' 

 via and to the entire leaved species oi Erysimwrty exclud- 

 ing- £. Alliaria. 



Species. 1. C. Pallasii. Ph.— North West Coast. 2. 

 • asper. Stem simple, and acutely angular; JeaA'es canes» 

 eently pilose, sublinear, entire, margin acculeately and re- 

 trorsely asperate, radical fasciculated attenuated-sublan- 

 eeolate, acute, retrorsely toothed; silique very long quad- 

 rangular and divaricate; claws of the petals longer, than 

 the calix. Cheiranthis en/simoicles. Ph. Hab On the 

 plains of the Missouri, commencing near the confluence 

 of White river. Fl. June. Obs Biennial. Stem 12 to 

 18 inches high, mostly simple, but nov^ and then branch- 

 ing towards the summit. Leaves every where covered 

 with white, short, retrorse, strigose and appressed hairs; 

 margin aculeolate, stem leaves crowded, 2 or 3 lines 

 wide and 2 inches long. Flowers very similar to those 

 of C. Cheirif and almost equally odorous. Calix oblong, 

 2 of the leaves distinctly gibbous at the base. Petals di- 

 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 40 species, indigenous to Europe and 

 llie tenipera^.e and colder parts of Asia and Africa in both 

 hemispheres. 



463. HKSPERIS. L, (Rocket.) 



Cahx dosed, shorter than the claws of the 

 petals. Petals for the most part obliquely bent, 

 linear or obovate. Silique Hiiiyicvete. Lobes of 

 the stigma connivent. Seeds immarginate. 



Nearly allied to tlie preceding genus, having also 2 of 

 tlie calix leaves gibbous at the base, and a gland at the 

 inner base of the 2 sliorter stamina. Stigma in some spe- 

 cies sagittate at the base. 



Species. 1. H- pinnati/ida. Leaves ovate-lanceolate,- 

 sharply toothed, nearly smooth, lower and radical subpin- 



