1892. ] NEW YORK ACADEMY OF SCIENCES. 81 
*** Spikes very numerous in terminal, large, compound umbels. 
29. Scirpus sylwaticus, L. 
Scirpus sylvaticus, L. Sp. Pl., 51 (1753). 
Scirpus brunneus, Torr., Ann. Lyc., iii, 326 (1836), not Muhl.? 
In swamps. Massachusetts (Cooley); northern New Jersey 
(Austin, Apgar, Best, Britton); New York; Pennsylvania: Toby- 
hanna, Pocono Mts., and banks of Octorara Creek, Lancaster Co. 
(Porter); Monroe, Bucks Co. (J. A. Ruth); Gap, and near Smith- 
ville, Lancaster Co. (Small). Delaware: Centreville (Commons). 
West Virginia: White Sulphur Springs (Britton). North Caro- 
lina: near Hickory, Catawba Co. (Heller and Small, 274). 
30. Scirpus microcarpus, Presl. 
Scirpus microcarpus, Presl., Rel. Henk., i, 195 (1830). 
Scirpus lenticularis, Torr., Ann. Lyc. N. Y., iii, 328 (1836). 
S. sylvaticus, var. digynus, Beeckl., Linnea, xxxvi, 727 (1870). 
In swamps. Nova Scotia and Quebec, through British America 
to Alaska; south to New Hampshire: near base of Mt. Washington 
(Morong); New York: Buffalo (Clinton); banks of the Mohawk, 
near Schenectady (Wibbe); Lyon’s Falls, Black River (Haberer). 
Minnesota; Nevada: Reno (Tracy, 230, F.); and rather common 
in California and Oregon. 
31. Scirpus atrovirens, Muhl. 
Scirpus atrovirens, Muhl., Gram., 43 (1817). 
S. sylvaticus, var. atrovirens, Boeckl., Linnea, xxxvi, 495 (1870). 
In swamps. Nova Scotia to Manitoba; south to Georgia and 
Louisiana. 
Var. pallidus, Britton. 
S. atrovirens, var. pallidus, Britton, Trans. N. Y. Acad. Sci., ix, 13 (1889). 
Nebraska: Little Blue River, S. Platte (H. Engelmann); Hitch- 
cock Co., and Broken Bone, Custer Co. (Webber). Minnesota: 
Hennepin Co. (Sandberg). Kansas: Mitchell Co. (M. A. Carle- 
ton). Indian Territory (Palmer, 358). Colorado: Caiion City 
(Brandegee). Oregon: Multomah Co. (T. Howell); Medicine 
Hat, Saskatchewan River.(J. M. Macoun). 
32. Scirpus divaricatus, Ell. 
Scirpus divaricatus, Ell., Bot. S. C., i, 88, t. 2, f. 4 (1816). 
Scirpus lineatus, Muhl., Gram., 45 (1817), fide Torrey, not Michx. 
Scirpus ambiguus, Schult., Mant., ii, 85 (1824). 
In swamps. Florida and South Carolina to Louisiana; Ken- 
tucky (Short in Herb. Kew, fide Clarke). 
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