CYPERACEAE (SEDGE EAMILY) 



239 



BO and exceeding the culm ; .spikes 2-3, approximate, all slen- 

 derly stalked, spreading or drooping, 4-8 mm. long ; perigynia 

 orbicular or broad-ovate, nerved in the middle, i-| the length 

 of the castaneous scales. — Alpine bogs, e. Que. Aug. 



Var. irrigua (Wahlenb.) Fernald. Taller, 1-8 dm. high; 

 culm glabrous; spikes cylindric, 1-1.6 cm. long ; scales cas- 

 taneous. (C. magellanica Man. ed. 6, not Lam.) — Bogs, 

 Arctic regions, s. to Mass., Pa., Ont., and Utah. June-Aug. 

 (Eu.) Fig. 400. 



Var. pallens Fernald. Tall, the culms usually 

 scabrous ; spikes cylindric, 1-1.8 cm. long ; scales 

 green with pale brown or yelloivish margins. — 

 Bogs and mossy woods, e. Que. to B. C, s. to Ct., 

 N. Y., Mich., and Minn. June, July. 



112. C. limbsa L. Slender but rather stiff, 

 1.5-6 dm. high, very stoloniferous ; culm sharp, 

 rough above; spikes 1-2, nodding on short stalks or the upper one 

 erect, subcylindric, 1-2.5 cm. long, springing from the axil of a 

 very narrow bract which is nearly always shorter than the culm; 

 perigynia very short-pointed, about the length of 

 the broad brown or purplish scales. — Bogs, e. Que. 

 to Sask. and B. C, s. to Pa., Great Lake region. 



466. C. paup., V. 



467. C. limosa. 



Col., and Cal. May-Aug. (Eu.) Fig. 407 



4GS. C. raritlora. 



113. C. rariflbra Smith. Very small but stiff, 0.7-3.5 dm. 



high, slightly stoloniferous; culm obtuse and very smooth ; spikes 



1-3, only 3-10-flowered, drooping, 

 borne in the axil of a minute awl-like 

 and puiple-auricled bract ; perigynia 

 ovate, nearly pointless, obscurely 

 nerved, mostly a little shorter than 

 the purjjle-black enveloping scales. — Cold bogs and 

 granitic slopes, Arctic regions ; very locally s. to 

 Gulf of St. Lawrence ; Table-topped Mt., Gaspe Co., 

 Que. ; and Mt. Katahdin, Me. (Goodale). (Eu.) 

 Fig. 408. 



114. C. littoralis Schwein. Somewhat slender 

 but erect, 4-9 dm. high, stoloniferous ; leaves 3-6 mm. 

 broad, stiff, flat, glaucous, shorter than the sharp 

 and nearly smooth often solitary culms ; staminate 

 spikes 1-3, dark purple, 5.5 cm. long or less, the 

 scales obtuse ; x)istillate spikes 1-4, 

 somewhat approximate, on thread- 

 like peduncles, narrowly cylindric 

 (2-6 cm. long, 5-7 mm. thick), usu- 

 ally staminate at top ; perigynia 

 lance-oval, faintly nerved, the minute 

 beak entire, mostly longer than the 

 obtuse purple scale ; bracts promi- 

 nently purple-auricled. — Wet woods 

 and bogs, oftenest near the coast, 



Ct., and south w., local. May, June. Fig. 469. 



115. C. prasina AVahlenb. Slender, somewhat flexuous, 3-7 

 dm. high; culm rather sharp, smooth; leaves 2.5-5 mm. wide, 

 soft and flat, rough ; spikes 2—4, linear-cylindric, peduncled and 

 spreading or drooping, somewhat approximate, green, 1.5-0 cm. 



long, loosely flowered ; perigynia pale, thin, nearly nervele.ss, produced into a 

 short but slender entire or minutely toothed beak; scale very thin and acute, 

 nearly colorless. — Wet woods and glades, w. Me. to Ont., Mich., D. C, and 

 Del. ; and along the mts. to Ga. May-July. Fig. 470. 



116, C. picta Steud. Pather weak, 1.5-3 dm. high; leaves flat and frm. 



C. littoralis. 



470. C. prasina. 



