CYPERACEAE. 



VOL. I. 



3. Scirpus caespitosus L. Tufted Club-rush. Deer-hair. Fig. 803. 



Scirpus caespitosus L. Sp. PI. 48. 1753. 



Perennial, culms smooth, terete, densely tufted, 

 light green, erect or ascending, almost filiform, wiry, 

 4'-i5' long. Basal sheaths numerous, membranous, 

 imbricated, acuminate, the upper one bearing a short 

 very narrow blade ; spikelet solitary, terminal, few- 

 flowered, ovoid-oblong, about 2" long, subtended by 

 an involucral leaf or outer scale of about its own 

 length; scales yellowish-brown, ovate, obtuse or sub- 

 acute, deciduous; bristles 6, smooth, longer than the 

 achene; stamens 3; style 3-cleft; achene oblong, 

 smooth, 3-angled, brown, acute. 



In bogs and on moist rocks, Greenland to Alaska, south 

 to the mountains of New England, the Adirondacks, 

 western New York, Illinois, Minnesota and British Co- 

 lumbia, in the Rocky Mountains to Colorado, and on the 

 higher summits of the southern Alleghanies. Also in 

 Europe and Asia. June-Aug. 



4. Scirpus Clintoni A. Gray. Clinton's Club-rush. Fig. 804. 



S. Clintoni A. Gray, Am. Journ. Sci. (II.) 38: 290. 1864. 



Perennial, culms tufted, triangular, very slender, erect, 

 4'-: 5' tall, roughish on the angles. Lower sheaths im- 

 bricated, one or more of them bearing short subulate 

 blades, the upper one bearing a flat, narrowly linear 

 blade shorter than the culm ; spikelet solitary, terminal, 

 ovoid, few-flowered, \\"-2" long, subtended by a subu- 

 late involucral bract of less than its own length or 

 somewhat longer; scales ovate, pale brown, acute or the 

 outer one awned ; bristles 3-6, filiform, upwardly barbed, 

 as long as the achene or longer ; style 3-cleft ; achene 

 oblong, brown, sharply 3-angled, smooth, obtuse. 



In dry fields and thickets, New Brunswick to western 

 New York and Michigan, and in North Carolina. Local. 

 June-Aug. 



5. Scirpus planifolius Muhl. Wood Club-rush. Fig. 805. 



Scirpus planifolius Muhl. Gram. 32. 1817. 



Perennial, culms triangular, slender, tufted, rather 

 weak, roughish on the angles, 6' -15' tall. Lower sheaths 

 bearing short subulate blades, the upper with a flat nar- 

 rowly linear rough-margined leaf about as long as the 

 culm ; spikelet solitar} r , terminal, ovoid-oblong, acute, 

 several-flowered, subtended by a short involucral bract; 

 scales ovate-lanceolate, yellowish-brown with a green 

 midvein, which is extended beyond the acute apex into a 

 sharp cusp ; bristles 4-6, upwardly barbed, about equal- 

 ling the achene; stamens 3; style 3-cleft, pubescent; 

 achene oblong, 3-angled ; smooth, light brown, rather 

 obtuse. 



In woods and thickets, Vermont and Massachusetts to 

 Delaware, the District of Columbia, western New York and 

 Missouri. May-July. 



