WOOTON AND STANDLEY FLORA OF NEW MEXICO. 285 



Roripa palustris Besser, Enum. PI. 27. 1821. 

 Type locality: European. 



Range: British America to California, New Mexico, and North Carolina; also in 

 Europe and Asia. 

 New Mexico: Alamo Viejo {Meams 12). 



8. Radicula obtusa (Nutt.) Greene, Leaflets 1: 113. 1905. 



Nasturtium ohtusum Nutt.; Torr. & Gray, Fl. N. Amer. 1: 74. 1838. 



Type locality: "Banks of the Mississippi." 



Range: British Columbia to California, Michigan, and Texas. 



New Mexico: 8an Juan Valley; Inscription Rock; Ramah; Mogollon Mountains; 

 White and Sacramento mountains; Mesilla Valley. Wet ground. 



25. SCHOENOCRAMBE Greene. 



Perennial glabrous green herb with long horizontal rootstocks; stems simple or 

 branched, slender; cauline leaves linear, mostly entire; flowers rather large, yellow; 

 siliques 3 to 6 cm. long, slender, terete, euberect, on short spreading pedicels. 



1. Schoenocrambe linifolia (Nutt.) Greene, Pittonia 3: 127. 1896. 

 Nasturtium linifolium Nutt. Joum. Acad. Phila. 7: 12. 1834. 

 Erysimum linifolium Jones, Proc. Calif. Acad. II. 5: 622. 1895. 

 Type locality: "Head of Salmon River, in dry soils," Montana. 

 Range: Montana to British Columbia, Utah, and New Mexico.. 

 New Mexico: Carrizo Mountains {Matthews). 



26. SISYMBRIUM L. 



An anomalous remnant which needs further study and generic segregation. The 

 species here assembled show little relationship to each other. 



KEY TO THE SPECIES. 



Pubescence of branched hairs 1. S. diffusum. 



Pubescence of unbranched hairs, or none. 



Plants pubescent; flowers bright yellow; pedicels erect 3. S. officinale 



leiocarpum. 

 Plants glabrous; flowers white or ochroleucous; pedicels spread- 

 ing or ascending. 



Plants glaucous; leaves entire 2. S. vaseyi. 



Plants green; leaves pinnatifid 4. S. altissimum. 



1. Sisymbrium diffusum A. Gray, PI. Wright. 1: 8. 1852. 



Type locality: "Pass of the Limpia, in crevices of rocks on the mountains," 

 Texas. Type collected by Wright (no. 10). 



Range: Western Texas to California, south into Mexico. 



New Mexico: Hop Canyon; Mangas Springs; Mogollon Mountains; Black Range; 

 Florida Mountains; Organ Mountains. Dry hills and canyons, in the Upper Sonoran 

 Zone. 



2. Sisymbrium vaseyi S. Wats, in A. Gray, Syn. Fl. 1^: 138. 1895. 

 Thelypodium vaseyi Coulter, Contr. U. S. Nat. Herb. 1: 30. 1890, in part. 



Type locality: Mountains west of Las Vegas, New Mexico. Type collected by 

 G. R. Vasey in 1881. 



Range: Mountains of New Mexico. 



New Mexico: Santa Fe and Las Vegas mountains; Sandia Mountains; Graham; 

 White and Sacramento mountains. Transition Zone. 



A handsome plant of the open parks at higher elevations in the mountains. Its 

 masses of white flowers make iu very attractive, especially when, as often happens, it 

 is combined ^.\iih brighter colored flowers. 



