374 JUNCACEiE. 



slender, about 2-leaved. Panicle 4 — 8 inches long, the branches subveiticillate 

 ami diversrinff. Flowers greenish, in somewhat hemispherical heads. 



Whorled Rush. 



8. J. acuminalus Mich. : stem erect ; leaves somewhat compressed, no- 

 dose ; panicle terminal, compound ; heads 3 — 6-flowered, pedunculate and 

 sessile ; leafets of the perianth linear-lanceolate, mucronate, shorter than 

 the acutely triangular capsule ; stamens 3 ; seeds tailed at each end. J.* 

 sylvaiicus MiM. 



Boggy meadows. Can. to Car. July. %.. — StemVl — 15 inches high. Leaves 

 distantly jointed. Panicle more or less compound, rather erect, spreading. 

 Flowers pale-green or purplish, mostly 3 in a head. Sharp-fruited Rush. 



9. J. pelocarpus Meyer : stem erect, bearing a single leaf, compressed ; 

 leaves setaceous, compressed, obscurely nodose ; panicle pyramidal, spread- 

 ing ; heads about 2-flowered ; leafets of the perianth oblong, obtuse, the 

 inner ones a little longer, shorter than the triquetrous ovate capsule. (^Torr. 

 N. Y. Fl.) 



Ver. and N. Y. ? %■. — Stem 15 — 18 inches high. Panicle loose and elon- 

 gated. Heads 3— 6-flowered. Stamens 6. Brownish Rush. 



10. J. Conradi Tuckerman : stem erect, leafy ; leaves erect, compressed, 

 slightly nodose ; inflorescence terminal, decompound, divaricate ; flowers 

 solitary ; leafets of the perianth lanceolate-acute, shorter than the oblong 

 acuminate-rostrate capsule. ( Tarr. N. Y. FL.) J. viviparus Conrad. 



Borders of ponds in sandy soils. N. H. Mass. N. Y. and N. J. July, Aug. 

 0. — Stem cespitose, 6 — 10 inches high, slender. Leaves few. Inflorescence 

 spreading, with the branches slender. Flowers often viviparous or abortive, 

 reddish-brown. Stamens 6. Torr. Conrad's Rush. 



*** Leaves fiat or channelled on the upper side. 



11. J", tenuis Willd. : stems cespitose, slender, leafy at the base, erect, 

 somewhat compressed ; leaves setaceous-linear, channelled ; panicle termi- 

 nal, more or less compound ; flowers sohtary, unilateral ; leafets of the per- 

 ianth lanceolate, a little longer than the obtuse capsule. J. hicornis Mich. 



Low grounds. N. Y. to Car. June, July. %. — S^eros cespitose, 10 or 12 inches 

 high. Panicle cymose ; the peduncles unequal. Flowers solitary, greenish, 

 somewhat racemose or unilateral on the branchlets. Slender Rush. 



12. J. Greenei Tuckerm. d^ Oakes : stem erect, leafy at the base, terete, 

 rigid ; leaves setaceous-linear, channelled above, rounded on the back ; 

 panicle terminal, compound, cymose ; flowers soUtary, erect, unilateral ; 

 leafets of the perianth shorter than the ovoid-oblong rather obtuse capsule. 



Sandy borders of salt marshes. Mass. and N. Y. July. %. — Sterna cespi- 

 tose, 12—18 inches high, striate. Panicle consisting of several much contracted 

 cymes. Flowers unilateral, greenish. Greene's Rush. 



13. J. Gerardi Loisel.: stem simple, leafy, compressed; leaves linear- 

 setaceous, channelled ; panicle terminal, compound, cymose, longer than 

 the bracteal leaves ; leafets of the perianth oblong, somewhat obtuse, mostly 

 shorter than the obovoid obtuse triangular capsule ; stamens 6 ; seeds ob- 

 iong-ovoid, strongly ribbed. J. bulbosus Pursh. 



Borders of salt marshes. N, Y. to Car. Aug. 7]..— SfeTw 8 — 12 inches high, 

 slender. Panicle rather crowded, the branches unequal. Flowers and capsules 

 dark-brown. Black Grass. 



