Genus 25. 



MUSTARD FAMILY. 



^73 



3. Cheirinia repanda (L.) Link. Repand 

 Cheirinia. Fig. 2057. 



Erysimum repandum L. Amoen. Acad. 3: 415. 1756. 



Cheirinia repanda Link, Enum. Hort. Berol. 2: 171. 

 1820. 



Annual, pubescent, about i" high, often much 

 branched. Leaves lanceolate to oblong-lanceolate, 

 li'-3i' long, repand-denticulate or the lower ones 

 coarsely toothed; flowers 3"-4i" high; pedicels 

 stout, 2"-3" long; style short and stout; pods 

 widely spreading, ii'-3i' long, about i" thick. 



Waste and cultivated grounds, Ohio to Kansas and 

 Arizona, and in ballast at eastern seaports. Adven- 

 tive or naturalized from Europe. May-July. 



4. Cheirinia aspera (DC.) Britton. Western Wall-flower. 



Fig. 2058. 



Yellow Phlox. 



Erysimum lanceolatum Pursh, Fi. Am. 



Sept. 436. 1814. Not R. Br. 1812. 

 Erysimutn asperum DC. Syst. 2 : 505. 



1821. 

 Erysimum arkansanum Nutt. ; T. & G. 



Fl. N. A. 1 : 95. 1838. 



Rough-pubescent or hoary, l°-3° 

 high, simple or branching above. 

 Lower leaves lanceolate or linear, 

 tapering into a petiole, dentate or 

 sometimes entire, mainly acute; upper 

 leaves smaller, sessile or nearly so, 

 entire or rarely toothed ; flowers 

 orange-yellow, large and showy, 6"- 

 12" high and nearly as broad; pedi- 

 cels stout, spreading, 2"-3" long in 

 fruit; pods linear, rough, ii'-4' long, 

 nearly i" wide, 4-sided; styles short, 

 thick. 



In open places, Newfoundland and 

 Quebec ; Ohio and Illinois to Texas, 

 Saskatchewan, Colorado and New Mex- 

 ico. The eastern plant generally has 

 broader leaves than the western. Prai- 

 rie-rocket. Orange-mustard. May-July. 



26. ERYSIMUM [Tourn.] L. Sp. PI. 660. 1753. 



Annual or binennial, mostly tall and erect herbs, with simple entire lobed or pinnatifid 

 leaves, and yellow flowers. Siliques linear-conic, terete, many-seeded. Valves mostly 

 3-nerved, dehiscent. Stigma with 2 short lobes. Seeds in i row in each cell of the pod, 

 marginless. Cotyledons incumbent. [Greek name of some garden plant.] 



A genus of few species, natives of the Old World, the following typical. 



