154 JUNG ACE AE 



23. J. orthophyllus Coville. Stem erect, 2.5-3 dm. high, compressed, 

 1-1.5 mm. thick; leaf-blades 5-10 cm. long, flat, 4-5 mm. broad, many-nerved, 

 those of the stem-leaves narrower; inflorescence of 2-6 heads; heads 8-10-flowered; 

 sepals as in the preceding; petals broader, acutish, with broad margins; capsule 

 slightly shorter than the petals, oblong, trigonous, obtuse, mucronate, imper- 

 fectly 3-celled. /. longistylis latifolius Engelm. Mountains: Wash. 'Calif. 

 Utah. Plain Submont. My-Au. 



24. J. uncialis Greene. Annual, 2-3 cm. high, branched near the base, 

 glabrous; leaves basal, flat, somewhat fleshy, linear, acute, 3-8 mm. long; scapes 

 1-flowered, with a single minute bract; sepals and petals oblong-lanceolate, acute, 

 hyaline, with a purplish or greenish midrib, about 1.5 mm. long; capsule obtuse, 

 slightly shorter; seeds apiculate. (?) J. triformis uniflorus Engelm. Wet places: 

 Wash. Utah 'Calif. Plain -Submont. Je Jl. 



25. J. nodosus L. Stem 1.5-6 dm. high, erect, terete or somewhat com- 

 pressed, leafy; leaf -blades erect, 0.5-1 mm. thick, terete, 5-15 cm. long, septate; 

 heads 1-30, 8-20-flowered; sepals 2.5-3.5 mm. long, lanceolate, subulate; petals 

 similar but slightly longer; capsule lanceolate-subulate, 3-gonous, 1-celled, straw- 

 colored, exceeding the perianth. Wet soil: N.S. Va. N.M. Nev. -B.C. 

 Mack, Plain Submont. Jl-S. 



26. J. Torreyi Coville. Stem stout, 3-9 dm. high, 2-4 mm. thick, leafy; 

 leaf -blades 1-3 mm. thick, terete, septate; heads 1-20, congested, 30-80-flowered ; 

 sepals and petals lance-subulate, about 5 mm. long; capsule subulate, 3-gonous, 

 1-celled. J. nodosus megacephalus Torr. Wet places, especially in sandy soil: 

 w N.Y. Miss. Calif. PlainMont. Jl-S. 



27. J. nevadensis S. Wats. Stem slender, erect, somewhat compressed, 

 2-4 dm. high, about 1 mm. thick; leaf-blades nearly terete, 0.5-1.5 mm. thick, 

 septate; heads 2-1 1, 3-10-flowered ; petals and sepals lanceolate, acute or mucron- 

 ate, dark brown, with membranous margins; capsule slightly shorter than the 

 perianth, brown above, acute. J. phaeocephalus gracilis Engelm. In meadows: 

 B.C. Calif. Wyo. (? Colo.) Mont. Submont. Mont. Je-S. 



28. J. truncatus Rydb. Stems slender, 3-5 dm. high, terete or slightly 

 flattened; leaves 1-3 dm. long, 1-2 mm. thick, septate; inflorescence open, 2-5 

 cm. long, irregularly cymose, with 4-10 heads; heads 6-9 mm. in diameter, 5-10- 

 flowered; petals and sepals lanceolate, dark brown, about 3 mm. long, acuminate, 

 longer than the capsule. J. alpinus insignis Coult., in part. /. Mertensianus 

 Auth., not Engelm. (?) J. badius Suskd. Mountain meadows: N.M. Wyo. 

 Ida. Submont. Mont. Je-Au. 



29. J. Mertensianus Bong. Stem erect, slender, 1-3 dm. high, 1-1.5 mm. 

 thick; leaf-blades about 1 mm. thick; inflorescence capitate, rarely with 2-3 

 heads; head 10-12 mm. thick, 10-25-flowered; sepals and petals lanceolate, acute, 

 almost black, the latter distinctly scarious-margined; capsule scarcely equalling 

 the perianth, 3-gonous, obovate, 1-celled, dark brown above. Wet meadows: 

 Alaska Calif. N.M. Alta. Mont.Subalp. Jl-Au. 



30. J. columbianus Coville. Stem 2-7 dm. high, terete, 1.5-2 mm. thick; 

 leaf -blades terete, 1-2 dm. long, inconspicuously septate, erect; inflorescence of 

 4-8 (rarely up to 20) heads ; sepals and petals lanceolate, cuspidate, straw-colored 

 or brownish, 3-3.5 mm. long; capsule equalling the perianth or a little shorter, 

 oblong, acute or beaked. Meadows: Wash. Ore. 'Mont. Submont. My-Jl. 



31. J. Richardsonianus Schult. Stem erect, 1.5-5 dm. high; blades terete 

 or slightly compressed, septate, 0.5-1 mm. thick; inflorescence with 5-25 heads, 

 which are 4-6 mm. thick, 3-12-flowered; sepals 2-2.5 mm. long, pale greenish, 

 acutish; petals oblong, acute; capsule ovoid-oblong, slightly exceeding the 

 perianth. /. alpinus insignis Fries. In wet soil: N.S. Pa. -Neb. Wash. 

 Alaska. Plain Mont. Jl-S. 



32. J. Tweedyi Rydb. Stem strict, about 3 dm. high, light green, 2-3 mm. 

 thick; leaf -blades about 1 dm. long, terete or somewhat flattened, septate; in- 

 florescence of 4-10 heads in a contracted panicle; heads 5-8-flowered; sepals and 



