2Jj] FLORA OF BOULDER, COLORADO 1 29 



Frequent in ditches, streams, and springy swales in and 

 about Boulder, 5100-6000 ft. (Daniels, 590). 



Europe and Asia, thence to both North and South Amer- 

 ica. 



190. RADICULA Hill. Yellow cress. 



468. R. calycina (Engelm.) Greene [Nasturtium calycinum 

 Engelm. ; Roripa calycina (Engelm.) Rydb.]. Warty 



PODDED YELLOW CRESS. 



Along the railroad near Boulder lake, 5200-5300 ft. (Dan- 

 iels, 774). 



Montana to Washington and New Mexico. 



469. R. sinuata (Nutt.) Greene [Nasturtium sinuatum Nutt. ; 

 Roripa sinuata (Nutt.) A. S. Hitchc.]. Spreading yel- 

 low cress. 



On stream banks and in wet ground near Boulder (Ryd- 

 berg). 

 Minnesota to Washington ; Missouri to Arizona. 



470. R. hispida (Desv.) Moench. [Nasturtium hispidum 

 Desv.; Roripa hispida (Desv.) Britton]. Hairy marsh 

 cress. 



Along streams, ditches, and in swales, 5100-9000 ft. (Dan- 

 iels, 581). 



New Brunswick to British Columbia; Florida to New 

 Mexico. 



471. R. obtusa (Nutt.) Greene [Nasturtium obtusum Nutt.; 

 Roripa obtusa (Nutt.) Britton]. Blunt-leaved marsh 

 cress. 



Massif de 1' Arapahoe, 10000 ft. (Rydberg). 

 Michigan to Washington ; Texas to Utah. 



472. R. curvipes (Greene) Greene [Roripa curvipes Greene]. 

 Curved- podded marsh cress. 



In Boulder Canon, 5500-6000 ft. (Daniels, 544). 

 Wyoming to Colorado. 



