486 MONOCOTYLEDONOUS PLANTS. 



with brown spots. Spikes in a proliferous cyme or panicle, 

 brown. It >s quite doubtful whether this is distinct from the 

 preceding. 



16. S. marUimus Linn. : culm triquetrous, leafy ; corymb clustered ; 

 involucre about 3-leaved, very long ; spikes oblong ; glumes ovate, 3- 

 cleft, the middle segment subulate and reflexed ; style 3-cIeft. S. ro- 

 kuslus Pursh. S. marrostachyos MuhL. Torr. 



HAB. Salt marshes. N. Y. to Car. N. to Subarc. Amer. July, 

 Aug. If. Culm 34 feet high. Leaves taller than the culm. 

 Spikes ft 10, in a clustered panicle. Bristles 4. Our plant 

 does not appear to differ, at all from the European. 



17. <S. brunncus Muhl. : culm leafy, obtusely triangular ; cyme de- 

 compound ; involucrum 3 4-leaved ; spike round-ovate, clustered in 

 about sixes ; glumes ovate, obtuse. fif. exaltalus Pursh. 



HAB. Margins of ponds and lakes, N. Y. to Car. Aug., Sept. 

 U* Culm 23 feet high. Leaves long, Spikes brown. Seed 

 shorter than the bristles. 



18. S. atrovirens Muhl : culm triangular, leafy ; cyme terminal, com- 

 pound, proliferous ; involucrum 3-leaved ; spikes conglomerate, ovate, 

 acute ; glumes ovate, mucronate, pubescent. 



HAB. Wet meadows. N. S. June, July. 2j.. Culm 2 feet, 

 high. Sjiikcs crowded into small heads, brown, smaller than in 

 the. preceding. Bristles 4, longer than the seed. *' ' 



** Seed wilJiout bristles at the base. 



19. S. capillaris Linn. : culm nearly naked, triquetrous, capillary ,- 

 spikes ovate, 2 3 of them pedunculate, -with an intermediate sessile 

 one. & cfliatifolius E1L 



HAB. Wet grounds. N. Y. to Car. Aug. . ? Culm S in- 

 ches high, slender. Ideates mostly radical, setaceous. Spikes 

 somewhat umbelled. Seed naked at base. 



20. S. autumnalis Linn. : culm compressed, ancipitous j'umbel com- 

 pound ; involucre 2-leaved ; spikes lanceolate, acute, somewhat 4- 

 sided. S. mucronulaius Mich. Fimbristi/lis autumnalis Vahl. 



HAB. Low woods. N. Y. to Car. July Oct. 1C . -Culms 

 812 inches high, cespitose. Spikes sometimes clustered in 

 threes. Style 3-cleft, not ciliate. (Torr.) Seod naked at base. 



6. TRICHOPHORUM. Per*. 



Spikcltts nearly ovate, imbricated in all directions. Bristles 



, of the seed usually 6, finally very much lengthened and ex- 



serted. Triandria. Monogynia. 



1. T. cyperinum Pers. : culm obtusely 3-angled, leafy ; panicle de- 

 compound, proliferous, somewhat nodding ; spikes all pedunculate. 

 Eriophorum cyperinum Linn. -Scirpus eriophorum Mich. Torr. 



HAB. Wet grounds. Can. to Car. Aug. If. Ct/Zw 35 feet 

 high, smooth. Involucre 4-leaved. Panicle terminal, much 

 divided and proliferous. This seems to be the connecting link 



