1920] Fernald & Wiegand,—Cerastiums of Section Orthodon 175 
VILLE IsLAND: Parry's Ist Voyage, 1819-20. ALASKA: Point Bar- 
row, July 3, and 7, 1883, John Murdoch.’ 
Ostenfeld has recently taken up C. nigrescens, ascribing it to Ed- 
mondston and dating it from the Flora of Shetland (1845). It was 
there published, however, in synonymy only, as a synonym of C. 
latifolium, 8. Edmondstonii and therefore, published merely as the 
synonym of a name in the varietal rank, cannot be cited as a valid 
binomial of that date. The name C. arcticum Lange originally 
covered a mixture, part of it generally conceded to be a hybrid. The 
true species involved was the present plant. Many authors are 
. inclined to drop the name C. arcticum or to restrict it to a hybrid, but 
we follow Druce in Moss, Cambr. Brit. Fl. iii. 47 (1920). 
5. C. EanLEr Rydberg. Plant low, 0.5-1.8 dm. high, varying from 
slender to rather stout, more or less densely glandular-puberulent 
especially above: upper internodes rather long (2-4.5 em.): leaves 
narrowly oblong to elliptic, obtuse or subacute, glandular-pubescent, 
those of the season 2-5 pairs; the median 1-2 cm. long, 2-6(-8) mm. 
broad: bracts ovate to lanceolate, the upper sometimes slightly 
scarious-tipped: inflorescence 1-7-flowered, usually not conspicu- 
ously dichotomous: pedicels in maturity slender, erect or somewhat 
spreading, often arching at tip, 1.2-2.8 cm. long: sepals commonly 
fuscous or purplish, in anthesis 5-9, in fruit 7-10 mm. long, lanceo- 
late to ovate-lanceolate, acute or sub-acute, glandular-puberulent, 
with a broad scarious margin: petals rather showy, once and a half 
to twice the length of the sepals, ascending: capsule 8.5-13 mm. 
long: seeds 1.3-1.8 mm. in diameter; the close testa bluntly but 
strongly and uniformly papillose —Bull. Torr. Bot. Club, xxx. 249 
(1903).—Caleareous regions of the Rocky Mountains, Alberta and 
British Columbia to Arizona. The following specimens mostly 
distributed as C. Beeringianum, are characteristic. ALBERTA: 
mountains at Kicking Horse Lake, August 14, 1890, J. M. Macoun; 
back of Tunnel Mt., Banff, June 13, 1899, J. Macoun, no. 22,349 in 
part; Vermillion Mt., Banff, July 9, 1891, J. M. Macoun; Bow River 
Pass, September 13, 1879, J. Macoun, no. 99; Forget-me-not Mt., 
Elbow River, July 16, 1897, J. M. Macoun, no. 18,249; Lake Louise, 
July 14 and 25, 1906, Stewardson Brown, nos. 702, 706. BRITISH 
COLUMBIA: Upper Loup Creek, near Glacier, July 29, 1914, E. W. D. 
Holway; summit of Wapta, alt. 3050 m., July 10, 1906, Stewardson 
! Ostenfeld reports from King William Land an extreme arctic species, C. Regelii 
Ostenfeld, Vid.-Selsk Skrift. Math.-Naturv. Klasse, 1909, no. 8, 10 (1910), a very 
slender, nearly glabrous plant with filiform branches; elliptic short leaves; filiform 
pedicels and rounded sepals 4.5-6 mm. long, with membranous violet-tinged mar- 
gins. He does not describe the seed; ard the only material we have seen (from Si- 
beria and à very young and doubtful plant from Cape N ome, Alaska, Blaisdell), is too 
immature to show seed-characters. 
