RUSH FAMILY - 153 



13. J. tenuis Willd. Stem 2-6 dm, high, spreading, sh'ghtlv flattened, 

 striate; leaf-blades nearly as long as the stem, 1-1.25 mm. wide, flat, soft; in- 

 tiorescence open, 1-7 cm. long, with the flowers near the end of the branches; 

 petals and sepals 3-4,5 mm. long, lanceolate, very acute, green, with white 

 scarious margins. Roadsides and meadows : Newf . —Fla.— Tex.— Mont.— 

 Ore.— Wash. Plain — Submont. My-S. 



14. J. Dudley! Wiegand. Stem 3-10 dm. Mgh, stiff, erect, strongly striate; 

 leaf-blades half as long as the stem or less, narrow, flat or involute; inflorescence 

 sniall, dense, 2-5 cm. long; sepals and petals 4-5 mm. long, lanceolate, acute, 

 yellowish green, with scarious margins; capsule ovoid, somewhat shorter than 

 the petals, rounded and apiculate at the apex, imperfectlv 3-ceIlnd. Damp 

 places and meadows: Me.— N.Y.—N.M.— Ariz,— Wash.— Alta.; Mex. Plain 

 — SubmonL My-Au. 



15. J. bufonius L. Stem 0.5-2 dm, (seldom 3 dm.) high; leaf-blades flat, 

 0.25-1 mm. wide; flowers inserted singly on the branches; sepals 4-6 mm. long, 

 narrowly lanceolate, subulate-attenuate, scarious-margined; petals somewhat 

 shorter, less attenuate; capsule shorter than the petals, obtuse, 3-celIed, Wet 



places: Greenl.—Fla.— Calif.— Alaska; Mex.; also Old World. Plain—Mont. 



Ap-S, 



16. J. sphaerocarpus Nees. Stem 0.5-2 dm. high; leaf-blades 0.5 mm. or 

 less wide; sepals 3-4 mm, long, pale, lanceolate, acuminate, slightly longer than 

 the petals, with broader scarious margins; capsule one-half to two-thirds as long 

 as the petals, 3-celled. Wet places: Ore.— CaUf. — Colo,— Ida, Plain— Sub- 

 monL Ap-Jl. 



17. J. triglumis L, Stem 5-15 cm. high, erect, terete, 1 mm. or less thick; 

 blades terete, 1-7 cm. long; sepals and petals ovate-lanceolate, obtiLse, brown, 

 about 4 mm. long; capsule cylindric, trigonous, imperfectly 3-celled. Arctic- 

 alpine regions: Greenl. — n N.Y, — N,M.— Alaska; Eurasia. Subalp.—Alp. Jl - 

 Au. 



18. J. biglumis L. Stem erect, subterete, 3-10 cm. (rarely 2 dm.) high; 

 blades terete or nearly so, 2-7 cm. long, about 1 mm. thick; sepals and petals- 

 3 _mm, long, oblong, rounded-obtuse, fuscous, vdth more greenish back; capsule 

 trigono-cylindric, retuse, imperfectly 3-celled, Arctic-alpine regions: Greenl. — 

 B.C. — Alaska; Eurasia. Alp, Jl-Au. 



19. J. castaneus J. E. Smith. Stems erect, terete, 1-3 dm. high, more or 

 less leafy; blades channeled, 3-10 cm. long, 1-2 mm. thick; sepals linear- 

 lanceolate, about 5 mm, long, acute, chestnut-brown; petals obtuse; capsule ovate- 

 prismatic, trigonous, acute, imperfectly 3-celled, almost black. Arctic-alpine 

 regions: Greenl. — Newf, — N.M. — ^Alaska; Eurasia, Suhalp. — Alp. Je-Au. 



20. J. Regelii Buch. Stem erect, terete or compressed, 2-5 dm. high, leafy, 

 1-2 mm. thick; blades 5-20 cm. long, 1-3 mm. wide, soft, many-nerved; inflores- 

 cence consisting of 1-3 globose, several-flowered heads; bractlets scarious, broadly 

 ovate, cuspidate; sepals 4-5 mm. long, lanceolate, acumifiate, narrowly scarious- 

 margined; petals ovate-lanceolate, acutlsh, broadly scarious-margined; capsule 

 equalling the perianth, ovate, trigonous, obtuse, dark browTi above. Mountain 

 meadows: B.C. — -Wash. — Utah — Mont. MonL — Subalp. Jl-Au. 



21. J. Jonesli Rydb. Stem about 2 dm. high, terete; leaf-blades 3-5 cm, 

 long, about 2 mm. wide, spreading; inflorescence capitate, or rarely with a 

 second head; sepals lanceolate, 5-6 mm. long, acute or cuspidate, green on the 

 back, brown on the sides, and with narrow scarious margins; petals ovate or ovate- 

 lanceolate, with broad margins; capsule dark brown, ellipsqid, retuse and apicu- 

 late. Mountain meadows: Utah. Mont, Au. 



22. J. longistylis Torr. Stem erect, slender, compressed, 3-5 cm. high, 

 1-1.5 mm. thick; leaf-blades 1-2 mm. wide, 5-10 cm. long; inflorescence of 1-6 

 heads; heads 5-12-flowered; sepals as in the preceding; petals broader, more 

 obtuse and with broader margins; capsule shorter than the perianth, oblong, 

 brown, trigonous above, obtuse. Meadows: Alta. — S.D, — N.M. —Calif,— 

 Ore.; Mex. Plain— MonL Je-Au. 



