29 

Densely czespitose. Stem erect 10—30 cm. high. Leaves chan- 
nelled, narrow, linear, ciliated; the lower obtuse, the upper acumi- 
nate sharply pointed. Stem leafy to the top. Lower bracts leaf-like; 
bractlets ovate acuminate, membraneous, lacerate. Clusters sessile, 
forming an interrupted spike-like somewhat drooping panicle. Sepals 
ovate-lanceolate acuminate, bristle-pointed, chestnut-coloured, some- 
what longer than the darker, broadly ovate, mucronate capsule. 
Am.: St. Lawrence Island, Bering Strait, Kotzebue Sound, Hudson 
Strait, Baffin Land: Cumberland Gulf, West Greenl. 60°—71° (!), East 
Greenl. 65° 40’, 70°—71° (!). Eur.: Habarowa (Fisher, in litt.), Novaya 
Zemlya at 73°—74°. As.: Chukches Land. 
Geogr. area: Northern North America, Iceland, Ferées, Northern 
Scandinavia, Finland, Northern Russia, Central European Mountains, 
Caucasus, Northern Asia to Himalaya. 
63. L. arcuata (Wg.) Sw. 
Hook. FI. Bor. Am. II p. 189; Taylor, Pl. coll. at Davis Str. and Baff. 
Bay p, 84; Hart, Brit. Pol. Exped. p. 142; Lge. Consp. Fl. Groenl. p. 126; 
Reichardt, Fl. Jan Mayen p.11; Nath., Spetsb. Karlv. p.37; Th. Holm, 
Novaja Semlias Veget. p. 25; Th. Fries, Beeren Isl. Veget. p. 155; Ledeb. 
Fl. Ross. IV p. 218 (excl. 8 & 7); Schmidt, Fl. Jeniss. arct. p. 122 (excl. 8); 
Kjellm., St. Lawrence-6n p. 22, Vest-Eskim. Land p. 59; L. hyperborea 
R. Br., Chloris Melvill. p. 25 (p. pt.); Taylor, l.c. p.84; Feilden, Fl. of 
Kolguev p. 184; Th. Fries, Nov. Semljas Veget. p. 40; L. hyperborea 
« major Hook. |. ec. p. 188; Macoun, Cat. IV p.68; L. arcuata v. hyperborea 
Trauty. Consp. Fl. Noy. Zeml. p. 80, Syll. Pl. Sib. bor. orient. p. 536; 
Ross. Arect. Pl p. 554, Fl. Kolym. p. 563; L. confusa Lindeb. Botan. No- 
tiser 1855 p.9; Lge. Consp. Fl. Groenl. l.c. p. 127; Hartz, Nordést Gronl. 
p. 343; Feilden, Nov. Zemlya p. 21; Kurtz, Fl. d. Tschuktschenh. p. 476; 
L. arcuata y. confusa Kjellm., Sib. Nordkust Fanerogamfl. p. 277, As. Be- 
ringss. p. 566, Vest-Eskim. Land p.59; Kjellm. & Lundstr., Nov.Semlja 
p. 317; Andersson, Konig Karls Land p. 557; Nath., l. ¢. p. 37; Reich- 
ardt, lc. p.11; Blytt, Bidrag p.9, L. spicata y. Kjellmani Nath. sec. Bu- 
chenau Monogr. June. p. 126; Juncus arcuatus «@ & B Wg. FI. Lapp. 
(1812) p. 88. 
Loosely tufted and with short stolons. Culms erect or ascen- 
ding, 10—25 cm. high. Leaves narrow linear, curved or erect, 
channeled, nearly glabrous, somewhat hairy at the base. Clusters 
in an umbelliform panicle, exterior branches long, erect or arching; 
not seldom the inflorescence is contracted and capitate. Bracts 
chestnut-coloured membranous, long ciliated. Sepals dark chestnut- 
coloured, acuminate, about as long as the capsule. Anthers about 
as long as the filaments. 
L. arcuata « (Wg.) is the more gracile form with narrow curved 
leaves, few-flowered clusters on slender arching branches; it is 
rather seldom. L. arcuata 6 (Wg.) (= L. hyperborea R. Br. and L. con- 
