3°° 



CYPERACEAE. 



Vol. I. 



7. Cyperus sabulosus Mart. & Schrad. Elegant Cyperus. Fig. 727. 



Cyperus flavicomus Vahl, Enum. 2 : 360. 1806. Not Michx, 

 Pycraeus sabulosus Mart. & Schrad. ; Mart. Fl. Bras. 2 1 : 



10. 1842. 

 Cyperus sabulosus Mart. & Schrad. ; Boeckl. Linnaea 35 : 



468. 1867-68. 



Annual, culms stout or slender, i°-3° tall, leafy be- 

 low. Leaves smooth, or rough-margined, 2" -3" wide, 

 those of the involucre 3-8, the longer ones much ex- 

 ceeding the inflorescence ; umbels few-several-rayed, 

 often compound ; primary rays i'-2i' long ; spikelets 

 numerous, usually densely clustered, linear, acute, 

 4"-io" long, i"-ii" wide, flat, many-flowered, spread- 

 ing; scales oblong, obtuse, thin, dull, yellowish-brown, 

 scarious-margined, faintly 3-nerved; stamens 3; style 

 2-clef t, little exserted ; achenes obovate, lenticular, 

 black, ' mucronate, not shining, nearly as long as the 

 scales and often persistent on the rachis after these 

 have fallen away. 



In wet or moist sandy soil, Virginia to Florida and 

 Louisiana. Also in Brazil. Aug.-Oct. 



8. Cyperus inflexus Muhl. Awned Cyperus. 

 Fig. 728. 



Cyperus inflexus Muhl. Gram. 16. 181 7. 



Cyperus aristatus Boeckl. Linnaea, 35: 500, in part. 1868. 

 Not Rottb. 1773. 



Annual, culms slender or almost filiform, tufted, i'-6' 

 tall, about equalled by the leaves. Leaves 1" wide or less, 

 those of the involucre 2-3, exceeding the umbel; umbel 

 sessile, capitate, or 1-3-rayed ; spikelets linear-oblong, 

 6-10-flowered, 2" -3" long; scales light brown, lanceolate, 

 rather firm, strongly several-nerved, tapering into a long, 

 recurved awn, falling from the rachis at maturity; stamen 

 1 ; style 3-cleft ; rachis narrowly winged, the wings per- 

 sistent; achene 3-angled, brown, dull, narrowly obovoid 

 or oblong, obtuse, mucronulate. 



In wet, sandy soil, New Brunswick to the Northwest Terri- 

 tory and British Columbia, south to Florida, Texas, California 

 and Mexico. Fragrant in drying. July-Sept. 



Cyperus compressus L. Flat Cyperus. Fig. 729. 



Cyperus compressus L. Sp. PI. 46. 1753. 



Annual, tufted, culms slender, erect or reclining, 

 smooth, 3'-io' long. Leaves light green, about 1" wide, 

 those of the involucre 2-3, the longer exceeding the 

 spikelets; umbel capitate or with 2-3 short rays; spike- 

 lets narrowly lanceolate, acute, 4"-io" long, ii"-2" 

 wide, very flat, many-flowered; scales light green with 

 a yellow band on each side, ovate, acuminate, firm, 

 keeled, several-nerved, falling away from the narrowly- 

 winged rachis at maturity ; stamens 3 ; style 3-cleft ; 

 achene sharply 3-angled, obovoid, obtuse, dull, brown, 

 about one-third as long as the scale. 



In fields and waste places, southern New York to Florida, 

 west to Missouri and Texas. Also in tropical America and 

 in the warmer parts of Asia and Africa. Aug.-Oct. 



