277] FLORA OF BOULDER, COLORADO 129 



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. RADICTTLA 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. siniiata (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 T Arapahoe, loooo ft. (Rydberg). 

 MICHIGAN to WASHINGTON ; TEXAS to UTAH. 



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

 CURVED-PODDED MARSH CRESS. 



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

 WYOMING to COLORADO. 



