404 _ RypBerG: Rocky MOUNTAIN FLORA 
in the tubercled or appendaged bracts, which are broadest below 
instead of above the middle. 
Cororapo: Delta, Sept. 3, 1897, /. H. Cowen (Agric. Coll. 
“Colo., xo. 4077) (type), Hotchkiss and Smiths Fork (wo. 4070). 
Wyvominc: Gardiner River, 1899, Aven & Elias Nelson, 5995 » 
Hams Fork, 1900, C. C. Curtis ; Fort Steele, 1901, Tweedy, 450. 
’ 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 am 
altitude of 1,000—1,600 m. 
Wyominc: Buffalo, 1900, F. Tweedy, 3302 (type); four miles 
below U. L. Ranch, 1896, Knowlton, 160 ; Steamboat Lake, 1900,. 
Osterhout, 2330, 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. long 
and about 2 mm. wide, almost without a trace of a wing-margin. 
In habit this species resembles mostly C marginale, but dif- 
fers in the lack of the wing-margins of the fruit characteristic of 
that species. In this respect it more resembles C. vil/osum, but is 
a-much more slender plant and glabrous. 
Wyomine : Laramie, i897, A. Nelson, 4282 (type). 
Cotorapo: A specimen in the Torrey herbarium without any 
other data. 
v 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, 1-ribbed or faintly 3-ribbed, acute, rather fleshy ;. 
