RYDBERG: STUDIES ON THE Rocky MOouNTAIN FLORA 323 
CHEIRINIA Link, Enum. Hort. Berol. 2: 170. 1822 
The type of the genus Erysimum (Tourn.) L. is E. officinale L., 
usually known under the name Sisymbrium officinale Scop. If the 
genus which has usually passed under the name Erysimum is 
regarded as distinct from Chetranthus, it must be known under 
another name. The oldest available name is Cheirinia, with 
Erysimum cheiranthoides as the type. As I regard the Rocky 
mountain species well distinct generically from the wallflower of 
Europe, I adopt Cheirinia as the name for the genus. 
CHEIRINIA CHEIRANTHOIDES (L.) Link, Enum. Hort. Berol. 
2: 170... 3627 
Erysimum cheiranthoides L. Sp. Pl. 668, 2 F764. 
Cheiranthus cheiranthoides Heller, Cat. N. Am. Pl. 4. 18098. 
’ Cheirinia syrticola (Sheld.) Rydb. comb. nov. 
Erysimum syrticolum Sheld. Bull. Torrey Club 20: 285. 1893. 
Cheiranthus syrticola Greene, Pittonia 3: 136. 1896. 
’ Cheirinia inconspicua (S. Wats.) Rydb. comb. nov. 
Erysimum parviflorum Nutt. in T. & G. Fl. N. Am. 1: 95. 1838. 
Not E. parviflorum Pers. 1807. 
Erysimum asperum inconspicuum S., Wats. Bot. King Exp. 24. 
1871, 
Erysimum inconspicuum MacMillan, Metasp. Minn. Valley 268. 
1892, 
Cheiranthus inconspicuus Greene, Pittonia 3: 134. 1896. 
“ Cheirinia arida (A. Nels.) Rydb. comb. nov. 
Cheiranthus aridus A. Nels. Bull. Torrey Club 26: 351. 
— 
899. 
~ Cheirinia aspera (Nutt.) Rydb. comb. nov. 
Cheiranthus asper Nutt. Gen. N. Am. Pl. 2: 69. 1818. 
Erysimum asperum DC. Syst. 2: 505. 1821. 
’Cheirinia elata (Nutt.) Rydb. comb. nov. 
Erysimum elatum Nutt. in T. & G. Fl. N. Am. 1: 95. 1838. 
Cheiranthus elatus Greene, Pittonia 3: 135. 1896. 
