468 PROCEEDINGS OF THE AMERICAN ACADEMY, 



Nachtr. 20, t. Xxx. fig. 175 ; Dewey, 1, c. viii. 94; Schwein. & Torr, 

 1. c. 313 ; Torr. 1. c. ; Carey, 1. c. ; Boott, 1. c. iii. 116, t. 3G8, in part; 

 Bailey, 1. c. 148, & in Gray, 1. c. ; Macouii, 1. c. 131 ; Brittou, 1. c. 356, 

 fig. 863 ; Howe, 48 Rep. N. Y. Mus. Nat. Hist. 42. G. leporina, 

 Mich. Fl. ii. 170^ not L. C. lagopodioides, var. scoparia, Boeckeler, 1. c. 

 114. — Lqw grounds or even dry open woods, Newfoundland to 

 Saskatchewan and Oregon, and southward. May-August. 



Var. MONILIFORMIS, Tuck. Spikelets scattered in a slender monili- 

 form spike, the lowest usually remote. — Enuru. Meth. 8, 17 ; Boott, 111. 

 1. c. t. 368, in part. G. tribuluides, var. reducta, Bailey, Proc. Am. 

 Acad. xxii. 147, as to syn., in part. G. tribuloides, var. moniliformis^ 

 Britton, 1. c. as to syn., in part. —Range of species, but infrequent. 



Var. condensa. — Fig. 5. — Spikelets spreading^ crowded in a short 

 globose or broad-ovoid head. — New Hampshire, Randolph, July 23, 

 1807 {E. F. Williams) : Vermont, Westmore, July 26, 1894 (K F. 

 Williams) ; Rutland, July 14, 1899 ( W. W. Egyleston) : Massachu- 

 setts, Tewksbury, July 21, 1858, Medford, July 26, 1865, Mystic 

 Pond, Aug. 9, 1868, and July 20, 1873 ( Wm. Boott) : Rhode Island, 

 Providence, July 19, 1871 (S. T. Olney) : Connecticutt, Griswold, 

 June 16, 1899 (C B. Graves, no. 150) : New York, Jefferson Co. 

 (Grawe) ; Fulton Chain Lakes, August, 1895 (/. V. Haberer): Ontario, 

 Courtland, June 26, 1901 (John Macoun, Herb. Geol. Surv. Can., no. 

 26,631). 



= = Perigynia 3.7 to barely 5 (average 4.5) mm. long. 



3. C. TRiBULOiDES, Wahlenb. — Figs. 6, 7. — Culms loose and usually 

 tall, 0.3 to 1 m. high, sharply trigonous : leaves soft and loose, 3 to 8 mm. 

 broad, numerous ; the upper often nearly or quite overtopping the culm ; 

 tliose of the sterile shoots crowded and somewhat distichous : spike oblong, 

 of 8 to IJf obovoid ascending more or less crowded gray-green or didl 

 brown spikelets 7 to 12 mm. long: perigynia with appressed tips. — 

 Kongl. Acad. Handl. xxiv. 145, and Fl. Lapp. 250; Bailey, Proc. Am. 

 Acad. 1. c, in Gray, 1. c, & Mem. Torr. CI. i. 54 ; Macoun, 1. c. 130 ; 

 Britton, 1. c. fig. 862 ; Howe, 1. c. 41. C. lagopodioides, Schkuhr in 

 Willd. 1. c, & Riedgr. Nachtr. 20, t. Yyy, fig. 177 ; Dewey, 1. c. 95 ; 

 Schwein. & Torr. 1. c.'; Carey, 1. c. ; Boott, 111. 1. c. t. 370; Boecke- 

 ler, 1. c. 113. G. scoparia var. lagopodioides, Torr. Ann. Lye. N. Y. 

 iii. 394; Tuck. 11. cc. — Swales and rich open woods, particularly in 

 alluvial soil. New Brunswick to Saskatchewan, and southward. 

 June-Sept. 



