406 RypsBerc: Rocky MouNTAIN FLORA 
‘Arenaria polycaulos sp. nov. 
Arenaria saxosa Coult. Man. 35, 1885, and Gray, Syn. FI. 1°: 
240, in part; not A. Gray, Pl. Wright. 2: 18. 
Perennial with a long tap-root, giving rise to numerous pros- 
trate or spreading stems about 1 dm. long, slender, finely scabrous 
puberulent ; leaves ovate or ovate lanceolate, spreading, about 5 
mm. long, finely puberulent; pedicels 5-10 mm, long; sepals 
ovate-lanceolate, short-acuminate, scarious-margined, 3-4 mm. 
long ; petals 5-6 mm. long, obovate, entire. 
This plant has generally been known as A. saxosa, but the 
type collected by Wright differs considerably from it, being sub- 
ligneous at the base, with short erect stems, lanceolate almost 
erect leaves and narrower sepals. A. folycaulos grows on dry 
hills at an altitude of 2600-3000 m. | 
Cotorapbo: Silverton, 1898 (type; collector not given, but 
specimens received from the Agricultural College of Colorado) ; 
1895, Tweedy, 773 ; Mt. Harvard, 1896, F. E. Clements, 54; Gray 
Back Mining Camps, 1900, Rydberg & Vreeland, 6288 ; La Plata 
P. O., 1898, Baker, Earle & Tracy, 444; Dark Cafion, 190!, 
Clements, 115 ; Breckenridge, 1896, Shear, 4558 and 4545. 
Arizona: Mt. Humphrey, 1883, Rusby, 537; 1897, &- E. 
Kunzé ; San Francisco Mts., 1892, Toumey, 487. 
“ Arenaria Tweedyi sp. nov. 
Perennial, densely cespitose with somewhat ligneous base; 
leaves fleshy, linear-filiform, 2-3 cm. long, less than 1 mm, wide, 
somewhat curved; stem usually less than 1 dm. high, glandular 
puberulent especially on the inflorescence; this an open cyme; 
bracts lanceolate, scarious-margined ; pedicels about 1 cm. long; 
sepals lanceolate, acute, about 5 mm. long, scarious-margined 
and decidedly glandular puberulent ; petals about 8 mm. long. 
This is most nearly related to A. wintahensis A. Nelson, differing 
in the fleshy not pungent leaves and the more glandular puberu- 
lent inflorescence. It grows in the mountains at an altitude of 
about 3600 m. 
CoLorapo: La Plata Mountains, 1896, Frank Tweedy. 
’ Arenaria Eastwoodiae sp. nov. 
Perennial with a cespitose base ; stems about 2 dm. high, pef- 
fectly glabrous ; leaves filiform, stiff, pungent, 1-2 cm. long, 0.5 
mm. wide, minutely scabrous-ciliolate on the margin below, dilated 
