404 Rydberg : Rocky Mountain flora 



in the tubercled or appendaged bracts, which are broadest below 

 instead of above the middle. 



Colorado: Delta, Sept. 3, 1897,/. H. Cowen (Agric. Coll. 

 Colo., no. -f-Oj I s ) (type), Hotchkiss and Smiths Fork {no. 40J0). 



Wyomixg : Gardiner River, 1899, Aven & Ellas Nelson, jppj ; 

 Hams Fork, 1900, C. C. Curtis ; Fort Steele, 1901, Tweedy, 4501. 



Atriplex odontoptera sp. nov. 



A shrubby dioecious perennial : stems with shining white more 

 or less flaky bark ; leaves narrowly oblanceolate, acute or ob- 

 tusish, 2—4 cm. long, entire, white-scurfy on both sides ; pistillate 

 flowers axillary ; fruiting bracts united to near the apex ; united 

 portion with 4 laciniate dentate wings, 3-4 mm. broad, reticulate 

 and ribbed ; free portion subulate, scarcely as long as the width of 

 the wing ; staminate plant unknown. 



This species is most nearly related to A. canescens, differing 

 mainly in the laciniate-toothed wings. It grows on plains at an 

 altitude of 1,000-1,600 m. 



Wyoming: Buffalo, 1900,^. Tweedy, JJ02 (type) ; four miles 

 below U. L. Ranch, 1896, Knozvlton, 160 ; Steamboat Lake, 1900, 

 Osterhout, 2jjo, in part. 



Coriospermum emarginatum sp. nov. 



Annual, perfectly glabrous or with a few hairs on the bracts, 

 branched near the base, 3-4 dm. high : leaves narrowly linear, 

 2-4 cm. long, 1-2 mm. wide, cuspidate-pointed ; bracts except 

 the lowest ovate, 5-7 mm. long, acuminate, scarious-margined, 

 much broader than the fruit ; fruit plano-convex, 2.5-3 mm - l° n g 

 and about 2 mm. wide, almost without a trace of a wing-margin. 



In habit this species resembles mostly C. marginalc, but dif- 

 fers in the lack of the wing-margins of the fruit characteristic of 

 that species. In this respect it more resembles C. villosum, but is 

 a much more slender plant and glabrous, 



Wyoming : Laramie, 1897, A. Nelson, 42S2 (type). 



Colorado : A specimen in the Torrey herbarium without any 

 other data. 



Claytonia rosea sp. nov. 



Scape about 1 dm. high, slender, from a small corm 10—15 mm. 

 in diameter ; basal leaves rare, long-petioled ; blade 1-2 cm. long, 

 spatulate ; stem-leaves linear or narrowly linear-lanceolate, sessile, 

 2-5 cm. long, i-ribbed or faintly 3 -ribbed, acute, rather fleshy; 



