ORDER 155. CTPERACE^B. 761 



107 C. lupullna Muhl. (B. 1. 149.) $ Spike erect, slender, subsessile ; 9 spikes 

 2 4, ovate-oblong, large, (20" by 9") and thick, or oblong-cylindric, short-pedun- 

 culate, erect, densely flowered, approximate, the lowest sometimes long-peduncu- 

 late and distant ; perig. ovate-conic, ventricous, long, conic-rostrate, bicuspidate, 

 nerved, glabrous, about thrice longer than the ovate-lanceolate, acuminate glume ; st. 

 1 3f, triquetreus, leafy ; Ivs. and bracts long, flat, wide, striate, scabrous on the 

 edge. Bright green. Well named from its hop-like spikes. Marshes and about 

 ponds, common. (C. lurida "Wahl.) 



108 C. lupuliformis Sartwell. (B. t 150.) $ Terminal spike long cylindric, 

 pedunculate, sometimes 1 or 2 short sessile ones below it ; ? spikes 3 to 5, large 

 (2 to 3 ), cylindric, (9'' thick) near, subsessile, the lowest more or less remote on 

 a long, exsert peduncle, all leafy bracted and subloose-flowered ; perig. globous- 

 ovate, inflated, long and large, terete, scabrous-rostrate, 2-horned, more than twice 

 longer than the ovate, cuspidate glume ; culm 2 to 3f, erect, large, stiff, surpassed 

 by the leafy bracts as well as by the lanceolate, rough, bright, green leaves. 

 B'orders of marshes, common. (C. lupulina, (3. polystachya Torr.) 



109 C. tentaculata Muhl. $ Spikes 2 4, oblong, cylindric, (24" by 6 or 7") 

 bracteate, upper one sessile, the rest nearly sessile, densely flowered ; perig. ovate, 

 inflated, long-rostrate, bidentate, nerved, diverging, glabrous, twice longer than the 

 ovate and small scabro-mucronate glume ; st. 1 2f, often large, triquetrous ; Ivs. 

 linear-lanceolate, longer than the stem. In clusters in wet or marshy places ; 

 common. 



110 C. stenolepis Torr. $ Spike short and small, rarely wanting ; $ spikes 

 3 to 5, cylindric, obtuse, oblong or rarely short, highest sometimes androgynous, 

 upper aggregated on the zigzag stem, lowest long-pedunculate, all very derise- 

 flowered, erect and stiff, with long and leafy bracts; perig. oblong-obovate, infla- 

 ted, tapering below, abruptly obtuse, long-beaked, bifurcate, a little longer than 

 the ovate -linear, awned glume; culm 1 to 2f, erect, strong, smooth, striate, with 

 flat, 'rather wide, rough-edged, bright green leaves. Va. to 111., in marshes, rare, 

 late-flowering. 



111 C. plantaginea Lam. nee Muhl. (B. t. 88.) $ Spike erect, large, sub- 

 clavate, with oblong and acute glumes; $ spikes 3 to 5, oblong, erect, remote, 

 sparse-flowered, 2 upper nearly inclosed-pedunculate, the lower ones exsertly- 

 pedunculate, with subulate bracts ; perig. oblong, triquetrous-elliptic or cuneiform, 

 tapering at either end. recurved at the apex, and entire at the orifice, longer than 

 the ovate-cuspidate glume ; st. 8 18' high, erect, triquetrous, with dark brown 

 sheaths ; Ivs. radical, broad, (9 to 10"), ensiform, strongly 3-nerved. Bright green. 

 Hedges and open woods, common, and one of the first appearing species in the 

 spring. (C. latifolia Wahl) 



112 C. Careyana Torr. (B. t. 89.) $ Spike erect^ oblong, with oblong and 

 obtuse glumes ; $ spikes 2 or 3, ovate, loose and few-flowered, distant upper sub- 

 sessile, all leafy bracieate ; perig. ovate, triquetrous, subinflated, nerved, acuminate, 

 tapering at the base, smooth and glabrous, entire at the orifice, twice longer than 

 the ovate, mucronate glume ; st. 1 2f, erect, smooth, leafy towards the base ; Ivs. 

 linear-lanceolate. 6" wide. Pale green. Woods, Auburn, N. Y., (Carey) and 

 Ohio (Sullivant). Closely related to C. plantaginea. 



113 C. laxiflora Lam. nee. Schk. (B. t. 87.) $ Spikes 2 4, subJRiform, erect, 

 attenuate, sparse-flowered, remote with a 2-edged peduncle, leafy bracteate, upper 

 one subsessile ; perig. s>val-triquetrous, tapering at both ends, shorl-rostrate, atten- 

 uate, glabrous, striate, excurved at the apex, a little longer than the oblong-mucron- 

 ate or ovate-acute glume; st. 6 12', acutely triquetrous; Ivs. radical, of medium 

 (3 to 4'') width. Glaucous or light green. Woods and hedges, common. Va- 

 riable. 



(3. PATULIFOLIA Dew. (C. anceps. Schk., fig. 195.) Lvs. radical, broad, many- 

 veined, narrower at the base; sheaths with long and leafy bracts; perig. 

 longer-rostrate. 



y. ANGUSTIFOLIA Dew. (Schk. fig. 128.) St. a foot high; Ivs. narrow, striate, 

 long ; perig. short-rostrate and much recurved. 



114 C. platyphylla Carey. (Boot. t. 90.) $ Spike with oblong, acute glumes ; 

 $ spikes 2 or 3, oblong, slender, few (3 to 6)-flowered, erect, not compact ; perig. 



ovate, triquetrous, acute, short-beaked, subrecurved, entire at the orifice, longer 



