112 JUNCACKAE (rush FAMILY) 



14. Jtmcus Vaseyi Engelm. Trans. St. Louis Acad. 2: 448. 1866. Caes- 

 pitose: steins 2-5 dm. high, slender, rigid, striate, covered with brown sheaths' 

 at base, sometimes leaf-bearing: leaves elongated, setaceous, terete, striate, 

 sulcata toward the base: spathe equaling or rarely longer than the small, con- 

 tracted panicle: panicle 1-3 cm. long, green: sepals equal, lanceolate, 3-4 mm. 

 long, outer ones subulate-tipped, inner ones broader, mucronate, more than 

 twice longer than the six stamens: anthers equaling the filaments: stigma 

 scarcely equahng the ovate ovary with its short style: capsule straw-colored, 

 ovate, retuse, 3-celled, equaling or a little longer than the sepals: seeds very 

 slender. — Colorado to New England. 



15. Juncus tenuis Willd. Sp. PI. 2: 214. 1799. Plant perennial, closely 

 tufted, 2-7 dm. high: leaves all basal, except those of the inflorescence; blades 

 flat, sometimes involute in drying: inflorescence exceeding or exceeded by its 

 lowest leaf: perianth 3.5-5 mm. long, its parts lanceolate, acuminate: sta- 

 mens 6, about one half as long as the perianth ; the anthers shorter than the 

 filaments: capsules usually about one fifth shorter than the perianth, ovate to 

 obovate, obtuse, mucronate, 3-celled: seeds narrowly oblong, with oblique 

 apiculations, reticulated in about 16 longitudinal rows. (/. interior and J. 

 Dudleyi Wiegand, Bull. Torr. Bot. Club 27: 516 and 624. 1901, at least as to 

 our specimens.)— -Common eastward and rather frequent in our range, though 

 in part replaced by the following, 



16. Juncus confusus Coville, Proc. Biol. Soc. Wash. 10: 137. 1897. Densely 

 tufted, 2-7 dm. high, erect: sheaths of the leaves with weU-developed ligules, 

 the blades about one half the length of the stem, flat, usually involute: spathe 

 much longer than the inflorescence, usually involute: panicle congested into a 

 turbinate cluster 2-3 cm. long: perianth-segments ovate-lanceolate, acute, 

 brown, with a green midrib: stamens 6, the anthers shorter than the filaments: 

 capsule oblong, equaling the perianth, retuse, completely 3-celled: seeds Ught 

 brown. — Meadows; Colorado to Montana and west to Oregon. 



17. Juncus bufonius L. Sp. PL 328. 1753. Plant annual, branching from 

 the base, erect, seldom exceeding 20 cm. in height, the stems in larger plants 

 with one or two leaves below the inflorescence : leaf -blade in the larger plants 

 flat, in depauperate ones filiform-involute: "inflorescence about one half as 

 high as the plant: flowers inserted singly on its branches: perianth parts 4-7 

 mm. long, lanceolate, acuminate: stamens usually 6, sometimes 3, seldom half 

 as long as the perianth: capsule narrowly oblong, obtuse, mucronate, 3-celled: 

 seeds broadly oblong, with straight apicxilations, finely reticulated. — Margins 

 of ponds, etc., frequent; widely distributed. 



18. Juncus subtriflorus (Mey.) Coville, Contrib. U. S. Nat. Herb. 4: 208. 

 1893. Caespitose: stems 3-5 dm. high, terete, filiform: sheath bristle-pointed: 

 spathe 1-4 cm. long, mostly surpassing the simple, about 3-flowered panicle: 

 sepals lanceolate, acute, or the outer ones acutish and scarcely longer than the 

 inner ones, more than twice exceeding the 6 stamens, 5 mm. or more long: 

 anthers hnear, a little longer than the filament: stigmas shorter than the slen- 

 der prismatic ovary, crowned with a very short style: capsule ovate-oblong, 

 triangular, retuse, 3-ceUed, equahng or a httle shorter than the sepals: seeds 

 ovate, striate-reticulate, long-tailed. /. Drummondii. — Colorado to Montana. 



19. JuncusHalliiEngelm.Trans. St. LomsAcad. 2: 446. 1866. Caespitose: 

 stems 1-3 dm. high, terete, fihform, much longer than the setaceous, terete 

 leaves: leaves 5-12 cm. long, g?-ooved just above the sheath: spathe scarcely 

 or a little surpassing the subsimple, few-flowered, contracted panicle: sepals 

 lanceolate, acute, 4 mm. long, outer ones a Uttle longer, twice exceeding the 

 6 stamens: stigma subsessile, equaling the ovate ovary, included: capsule 

 ovate, angled, retuse, 3-celled, scarcely exserted, deep brown: seeds oblong- 

 hnear, striate-reticulated, long-tailed. — ^Hall and Harbour, near Lake Ranch, 

 Colorado. 



20. Juncus Parryi Engelm. 1. c. Caespitose: stems very thin and wiry, 1^3 

 dm. long: leaves sulcate, one half or two thirds their length, terete above: 

 Spathe surpassing the very simple, 1-3-flowered panicle: sepals 6-7 mm. long, 

 lanceolate-subulate, the outer ones longer, bristle pointed, three times longer 



