38. Carex Ursina Dewey. Bear Sedge

Fig. 905

Carex ursina Dewey, Am. Journ. Sci. 27: 240. 1835. C. glareosa var. ursina Bailey, Carex Cat. 3. 1884.

Culms low, tufted, erect or slightly curving, 2 1/2' or less tall, smooth, from slender rootstocks. Leaves 1" wide or less, involute toward apex, about equalling the culm; bracts usually absent; spike solitary (or rarely with a very small second one at base), brown, obovoid or suborbicular, 2"-3 1/2" long, 2" wide, gynae-candrous, but slightly clavate at base; perigynia 7-15, appressed, ovate, not margined or serrulate, 1" long, a little more than 1/2" wide, rounded and stipitate at base, light colored, weakly nerved, abruptly tipped with a very minute beak; scales ovate, strongly brownish-tinged, obtuse, slightly shorter than perigynia; achene filling perigynium; stigmas 2.

Circumboreal. Summer.

38 Carex Ursina Dewey Bear Sedge 905

39. Carex Lachenalii Schk. Arctic Hare's-Foot Sedge

Fig. 906

Carex Lachenalii Schk. Riedgr. 51, pl. Y, f. 79. 1801. Carex lagopina Wahl. Kongl. Vet. Acad. Handl. (II.) 24: 145. 1803.

Culms stiff, erect, smooth, except immediately beneath head, 3'-16' tall, from slender rootstocks. Leaves flat, not involute, 1/2"-1 1/2" wide, shorter than the culm, bracts very short or wanting; spikes 2-6, gynaecandrous, oblong, dark brown, narrowed at the base, 2 1/2"-5" long, 1 1/2"-2 1/2" thick, densely many-flowered, clustered at the summit or the lower somewhat separated; perigynia appressed-ascending, elliptic or obovate, 1"-1 3/4" long, firm, lightly several-nerved, narrowed at the base, rather abruptly tipped by the beak; scales ovate, brown, hyaline-margined, obtuse to acutish, shorter than the perigynia; achene filling perigynium; stigmas 2.

Circumboreal. extending south to Quebec and Labrador and in the western mountains to Colorado and California. Summer.

Carex helvola Blytt, supposed to be a hybrid between this species and Carex canescens L., is reported from Greenland and Labrador.

39 Carex Lachenalii Schk Arctic Hare s Foot Sedge 906

40. Carex Amphigena (Fernald) Mackenzie. Northern Clustered Sedge

Fig. 907

C. glareosa var. amphigena Fernald, Rhodora 8: 47. 1906. C. glareosa Wahl. Flora Danica 14: pl. 2430, and of most authors. C. amphigena Mackenzie, Bull. Torr. Club 37: 246. 1910.

Resembling Carex glareosa and Carex Lachenalii. Culms weak and slender, 2'-18' tall, smooth, except immediately beneath head, from slender rootstocks. Leaves narrow, 1/4"-3/4" wide, involute; spikes 2-8, gynaecandrous, oblong or subglobose, 2 1/2"-6" long, 1 1/2"-2" wide, brown, subtended by very small scale-like bracts; perigynia 5-10, broadly elliptic, 1 1/4" long, 3/4" wide, strongly several-nerved, pale or brownish at maturity; scales ovate, obtusish, brown with hyaline margins; achene filling perigynium; stigmas 2.

Circumboreal, extending south along the coast to Labrador and Quebec. Summer. Erroneously illustrated in our first edition as Carex glareosa Wahl.

40 Carex Amphigena Fernald Mackenzie Northern Clus 90740 Carex Amphigena Fernald Mackenzie Northern Clus 908