1919} Fernald,— Arenaria groenlandica and glabra 17 
Bonanza Creek, Dawson, June 12, 1914, Eastwood, no. 204; Dawson 
Slide, Dawson, June 12, 1914, Eastwood, no. 207. Montana: Bald 
Mt., alt. 3050 m., July 22, 1880, S. Watson, no. 54; plains near Cut- 
bank Creek, August 5, 1883, Canby, no. 45. Wyomine: high moun- 
tains, Yellowstone Park, August 13, 1893, J. N. Rose, no. 483. NeE- 
vapa: East Humboldt Mts., alt. 3050 m., August, 1868, Watson, 
3 ; iffs 
Cusick, no. 969. WasHineron: rocky ridges near snow, at 2440 or 
2740 m., Mt. Paddo, September 15, 1883, Suksdorf, no. 175. 
V. THE SPECIFIC IDENTITY OF ARENARIA GROENLANDICA 
D A. GLABRA 
It has been customary to treat the boreal Arenaria groenlandica 
(Retz.) Spreng. and the more southern A. glabra Michx. as distinct 
species, the former extending from Greenland to the higher granitic 
mountains of New England and New York and locally southward 
along the Alleghenies to the mountains of North Carolina, the latter 
confined to the mountains of North Carolina, Tennessee and Georgia. 
The characters as stated by those who maintain the two as species 
are as follows: 
A. GROENLANDICA. Stems 2-8 in. long, 1-5-flowered oi stat 
3-20 cm. Sn sustnely forked (Small): leaves linear, 13-7 line 
long, the basal in a dense clus lee (Robinson) ; leaf-blades filiform a 
subulate, 0. Bt 5 em. long, the basal in a dense cluster (Small): 
pedicels 0. 5-1,5 em. long et sepals broadly ovate, 13-2 lines 
Jong (Robinson) ; sepals oblong or oblong-lanceolate, 3-4 mm. long 
(Small): petals shovate (Robinson, Small): capsule subglobose to 
oblong (Robinson); capsule ovoid, or rarely subglobose or nearly 
oblong, 5-6 mm. long (Small). 
A. GLAB Stems 6-12 in. high (Robinson); stems 0.5-3 dm. tall, 
often adh (Small): leaves ann ee linear, equaling or exceeding 
the internodes (Robinson); leaf-blades narrowly linear or nearly 
iform, 1-2.5 em. long (Sm ail), pedicels slongated (Robinson) ; 
pedicels 1-4 em. long (Small): sepals ovate-oblong, 1} lines long 
(Robinson) ; sepals oblong or ovate-oblong, 2.5-3 mm. long (Small) : 
petals spatulate tossed capsule ovoid (Robinson); capsule ovoid, 
3mm. long (Small). 
That the specific lines between the two are not satisfactory has long 
been evident from the fact that plants referred by one author to 
; 1 These characters are gg from the treatments by Robinson in Gray, Synop. Fi. i. 243 
(1897) and by Small, FI. S. E. U.S. ed. 2, 420 (1913). 
