28l] FLORA OF BOULDER, COLORADO 133 



493. D. Fladnizensis Wulf. White arctic whitlow-grass. 

 Above timberline, Arapahoe Peak, 11000-13000 ft. (Daniels, 



1009). 



Labrador to British Columbia; Colorado to Utah: Eu- 

 rope: Asia. 



494. D. cana Rydb. Hoary whitlow-grass. 

 Massif de 1' Arapahoe, 11000-12000 ft. (Rydberg). 

 Labrador to Yukon and Colorado. 



495. D. streptocarpa Gray. Twisted-podded whitlow-grass. 

 Common in barren, rocky places throughout the mountain- 

 ous region 6000-13000 ft. (Daniels, 313). Also Eldora to 

 Baltimore (Rydberg). Sugarloaf, 8500 ft. (Cockerell). 



Colorado to New Mexico and Arizona. 



496. D. luteola Greene. Yellowish whitlowwort. 



In spray of Boulder Falls, a decumbent small-flowered form, 

 7500 ft. (Daniels, 295). Also Eldora to Baltimore (Rydberg). 

 Colorado. 



497. D. aureiformis Rydb. [D. Bakeri Greene]. Baker's 

 whitlow-grass. 



Above timberline, Arapahoe Peak, 11000-12000 ft. (Daniels, 

 1004). 

 South Dakota to Color.\do. 



498. D. aurea Wahl. Golden whitlowwort. 



Common in the subalpine and alpine district, 8600 (Eldora)- 

 13000 (Arapahoe Peak) ft. (Daniels, 805). Also Eldora to 

 Baltimore (Rydberg). 



Greenland to British Columbia ; Colorado to Arizona. 



499. D. deeumbens Rydb. Decumbent whitlowwort. 



At snow-line, Arapahoe Peak, 12000-13000 ft. (Daniels, 

 914). 



C0L0R.\D0. 



200. CARDAMEUE L. Bitteecress. 

 SCO. C. cordifolia Gray. Heart-leaved bittercress. 



Wet mossy tundras above timberline, Arapahoe Peak, iiooo- 

 12000 ft. (Daniels, 713). Also mountains between Sunshine 



