468 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Nachtr. 20, t. Xxx. fig. 175; Dewey, 1. ¢. viii. 94; Schwein. & Torr. 
l. c. 313; Torr. 1. c. ; Carey, 1. c.; Boott, 1. c. iii. 116, t. 368, in part; 
Bailey, 1. c. 148, & in Gray, ]. c.; Macoun, I. c. 131; Britton, 1. ¢. 396, 
fig. 863; Howe, 48 Rep. N. Y. Mus. Nat. Hist. 42. (. leporina, 
Mich. Fl. ii. 170, not L. C-. lagopodioides, var. scoparia, Boeckeler, 1. c. 
114.— Low 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. — Enum. Meth. 8, 17; Boott, Ill. 
1. c. t. 368, in part. ©. tribuloides, var. reducta, Bailey, Proc. Am. 
Acad. xxii. 147, as to syn., in part. . 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 Hampsurre, Randolph, July 23, 
1897 (E. F. Williams): Vermont, Westmore, July 26, 1894 (Z. F. 
Williams) ; Rutland, July 14, 1899 (W. W. Eggleston): MassacHv- 
setts, Tewksbury, July 21, 1858, Medford, July 26, 1865, Mystic 
Pond, Aug. 9, 1868, and July 20, 1873 (Wm. Boott): Ruope IsLanD, 
Providence, July 19, 1871 (S. 7. Olney): ConnecricutTt, Griswold, 
June 16, 1899 (C. B. Graves, no. 150): New Yor, Jefferson Co. 
(Crawe) ; Fulton Chain Lakes, August, 1895 (J. V. Haberer): ONTARIO, 
Courtland, June 26, 1901 (John Macoun, Herb. Geol. Sury. Can., 0. 
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 5 mm. 
broad, numerous; the upper often nearly or quite overtopping the culm ; 
those of the sterile shoots crowded and somewhat distichous: spike oblong, 
of 8 to 14 obovoid ascending more or less crowded gray-green or dull 
brown spikelets 7 to 12 mm. long: perigynia with appressed tips. — 
Kéngl. Acad. Handl. xxiv. 145, and FI. Lapp. 250; Bailey, Proc. Am- 
Acad. 1. ¢., in Gray, 1. ¢., & Mem. Torr. Cl. i. 54; Macoun, 1. c. 1305 
Britton, 1. ¢. fig. 862; Howe, 1. c. 41. ©. lagopodioides, Schkuhr 1 
Willd. 1. c., & Riedgr. Nachtr. 20, t. Yyy, fig. 177; Dewey, ]. ¢- 953 
Schwein. & Torr. l. c.; Carey, 1. c.; Boott, Ill. 1c. t. 870; Boecke- 
ler, 1. c. 113. ©. scoparia var. lagopodioides, Torr. Aun. Lye. N. Y. 
iii. 394; Tuck. ll. ce.—Swales and rich open woods, particularly 1 
alluvial soil, New Brunswick to SasKATCHEWAN, and southward. 
June—Sept. 
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