1919] Fernald,— Arenaria sajanensis 18 
The crowded trailing freely forking subligneous branches densely clothed 
with highly marcescent thick-ribbed leaves: petals 1.5-2.5 mm. broad, 
conspicuously exceeding the pilose or hirsute sepals: anthers 0.5-1 mm. 
long: capsule 6-10 mm. long, with firm stramineous valves: seeds 
reniform-obovate, with the micropyle prolonged into a beak, 0.7-1.2 
mm. long. 
Leaves round-tipped. 
Leaves oblong, ciliolate, pale-green, 1-5 mm. long, about 1 mm. 
broad, very densely imbricated: calyx glandular: seed rugose or 
s 10 cece NEM o A. obtusiloba. 
Leaves linear, glabrous-margined, deep green, 4-8 mm. long, 0.3- 
0.5 mm. broad, loosely imbricated: calyx not glandular: seed 
smooth or obscurely pebbled.................. A. marcescens. 
Leaves sharp at apex................:. 2 MR ?A. laricifolia. 
A. SAJANENSIS Willd. in Schlecht. Berl. Gesell. Nat. Fr. Mag. vii. 
200 (1816); Seringe in DC. Prodr. i. 408 (1824). Stellaria biflora 
L. Sp. Pl. 422 (1753), not Arenaria biflora L. Mant. 71 (1767). Ceras- 
tium biflorum (L.) Crantz, Inst. ii. 402 (1766).  Alsine biflora (L.) 
Wahlenb. Fl. Lapp. 128 (1812).  Alsinella biflora (L.) Swartz, Summ. 
Veg. Scand. 17 (1814). Ar. occulta Fisch. ex Seringe in DC. Prodr., 
i. 408 (1824). Ar. polygonoides, 8 occulta Ser. in DC. 1. c. (1824). 
Ar. scandinavica Spreng. Syst. ii. 402 (1825). Sabulina biflora (L.) 
Reichenb. Fl. Germ. Excurs. 790 (1832). Ar. stenopetala "Turcz. 
Bull. Soc. Nat. Mose. (1838) 89. Ar. alpina Porter & Coult. Syn. Fl. 
Colo. 14 (1874), chiefly. Ar. biflora Watson, Bibl. Ind. 94 (1878), 
not L. Alsinanthe biflora (L.) Reichenb. Ic. Fl. Germ. v. 30. t. 209 
fig. 4939 (1842). Ar. sphagnoides 'Thomas ex Koch, Syn. Fl. Germ. 
ed. 2, 123 (1843). Alsinopsis sajanensis (Willd.) Cockerell, Am. 
Nat. xl. 864 (1906).— Arctic regions, south with us to the Torngat 
Mts., Labrador, the Shickshock Mts., Gaspé Co., Quebec, and alpine 
regions of Arizona and Oregon. The following specimens belong 
here. GREENLAND: Baals Revier, J. Vahl; Pilekrat ved S. Kangerd- 
luarksuk Fjord, Holsteinsborg Distr., August 5, 1884, Warming & 
- Holm. Hupson SrRArTs: Nottingham Island, August 24, 1884, 
R. Bel. Lasrapor: Rama, July 15-August 30, 1894, July- 
August, 1899, A. Stecker, nos. 208, 355, August 20-24, 1897, J. D. 
Sornborger, no. 286 (distributed as A. verna, var. hirta); Kanga- 
. laksiorvik Bay, September 1-10, 1908, Owen Bryant; Hebron, Ment- 
zel; Okkak, Fratres Morav. Qursec: Mt. Albert, Gaspé Co., July 
25-27, 1881, J. A. Allen; crevices and detritus of serpentine, barrens 
and brook-ravines, alt. 700-1050 m., Mt. Albert, August 8-15, 1905, 
Fernald & Collins, no. 77; July 25, 1906, Fernald & Collins, no. 
550. ALBERTA: meadows above Banff, July 8, 1907, Butters & 
Holway, no. 91; Elbow River, June, July, 1897, J. Macoun, no. 18,- 
286; Silver City, August 6, 1885, J. Macoun (distributed as A. 
arctica); Mt. Molar, alt. 1980 m., July 9, 1904, J. Macoun, no. 64,- 
688; Lake Louise, alt. 2200 m., July 20, 1904, J. Macoun, no. 64,687; 
Pipestone Creek, alt. 1980 m., July 7, 1904, J. Macoun, no. 64,689; 
summit of Otterhead Pass, alt. 2135 m., August 10, 1904, J. Macoun, 
