306 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Capsule notched at the apex; lowest bract at the base of the head usually 

 prolonged into a short terete blade; sepals dark purple or dark brown. 



14. J. biglumis. 



Capsule obtuse; lowest bract without a blade; sepals cream-colored in 

 flower, in age sometimes reddish 15. J. triglumis. 



1. Juncus parryi Engelm. Frequent above timber line, in wet meadows or on 

 open rocky slopes. B. C. to Calif., Colo., and Mont. — Plants 10 to 35 cm. high, 

 densely tufted; leaf sheaths loose, brown, the blades 2 to 5 cm. long; sepals brown, 



5 to 7 mm. long; capsule yellowish brown, 6 to 7 mm. long.. 



2. Juncus drummondii E. Mey. Common above timber line, in meadows or on 

 rocky slopes; sometimes in moist woods at middle altitudes. Alaska to Calif., N. 

 Mex., and Alta. — Plants 10 to 35 cm. high, usually densely tufted; sheaths close, 

 pale brown, the blades bristle-like, 3 to 10 mm. long; sepals 5 to 7 mm. long, dark 

 brown but green along the keel; capsule obtuse, about as long as the sepals. 



3. Juncus filiformis L. Sandbar at edge of Lake McDonald; abundant in sphag- 

 num bog at Fish Lake. Wash, to Utah, Pa., and Greenl.; also in Eur. and Asia. — 

 Plants 20 to 60 cm. high, very slender, often in dense tufts; leaves reduced to pale 

 brown sheaths; lowest bracts of the inflorescence often longer than the stem; flowers 



6 to 10, in a loose cluster; sepals 2.5 to 3.5 mm. long; capsule obovoid, very obtuse, 

 nearly as long as the sepals. 



4. Juncus balticus Willd. Frequent on the east slope at low altitudes, in marshes 

 or wet tliickets, sometimes on open slopes, often about low places on prairie. Alaska 

 to Calif., Mo., Pa., and Lab.; also in Eur. and Asia. (/. ater Rydb.) — Stems slender, 

 20 to 60 cm. high, rising at intervals from a stout creeping rootstock; leaves reduced 

 to loose brownish sheaths; sepals 3 to 4 mm. long, lanceolate, acute; capsule narrowly 

 ovoid, about as long as the sepals. 



6. Juncus bufonius L. Toad rush. Low muddy places about east entrance. 

 Widely distributed in N. Amer. and in the other continents. — Plants slender, much 

 branched from the base; leaves 0.5 to 1 mm. wide; sepals 4 to 6 mm. long, green with 

 thin white margins; capsule oblong, obtuse, shorter than the sepals. 



6. Juncus confusus Coville. Occasional on the east slope at middle altitudes, in 

 woods or on open hillsides. B. C. to N. Mex. and Nebr. — Stems very slender; leaves 

 less than 1 mm. wide, half to two-thirds as long as the stem; sepals about 4 mm. long, 

 green, with a narrow bro\vn stripe on each side and with broad thin wliitish margins; 

 capsule about as long as the sepals, pale brown. 



7. Juncus saximontanus A. Nels. Frequent at low altitudes, in moist or wet woods 

 or thickets or in mossy bogs. B. C. to Calif., N. Mex., and Alta. — -Stems leafy, 20 to 

 50 cm. high, rising from creeping rootstocks; leaves iris-like, 5 to 20 cm. long, with 

 interior cross partitions; heads 2 to 10 (rarely only 1), usually about 1 cm. wide; 

 sepals dark. brown, about 3 mm. long; capsule obtuse, short-beaked, about as long 

 as the sepals. 



8. Juncus ensifolius Wikstr. Frequent at low and middle altitudes, in bogs or 

 along streams and lakes. Alaska to Calif., Utah, and Alta. — Stems 30 to 60 cm. high, 

 from thick creeping rootstocks; leaves iris-like, 5 to 30 cm. long, 3 to 6 mm. wide; 

 heads usually 2 or more, about 1 cm. broad; sepals dark brown, 3 mm. long; capsule 

 usually slightly longer than the sepals. 



9. Juncus regelii Buchenau. Occasional on the east slope at low and middle 

 altitudes, on wet slopes or along streams and lakes. B. C. and Wash, to Utah and 

 Mont. — Stems leafy, 20 to 50 cm. high; leaves 5 to 20 cm. long, 1 to 3 mm. wide; 

 heads 1 to 3; sepals 4 to 5 mm. long, green, with broad, dark brown margins; capsule 

 very obtuse, about as long as the sepals. 



10. Juncus longistylis Torr. Occasional on the east slope at low altitudes, in wet 

 thickets. Alta. to Calif., Mex., and S. Dak. — Stems 20 to 40 cm. high, slender, 



