CypERUs. CYPERACE^. ' 343 



10. Cyperus wfl^xv s, Muhl. Dwarf Odorous Galin gale. 



Umbel contracted, the rays 1 - 3 ; involucre very long ; spikelets collected into ovoid 

 heads, oblong-linear, about S-flowcred ; rachilla laterally compressed, straight, winged : scales 

 cuspidate, squarrose at the tip, strongly nerved ; stamen solitary ; nut obovoid-triquetrous. — 

 Muhl. gram. p. 16 ; Ton: Jl. \.p. 59, and Cyp. p. 273 ; Bigel. fl. Bost. p. 18 ; Beck, hot. 

 p. 421 ; Darlingt. Jl. Cest. p. Id i Kunth, enum. 2. p. 22 ; Hook. Jl. Bor.-Am. 2. p. 232. 

 C. uncinatus, Pursh, fl. 1. p. 50 (not of Pair.). C. Purshii, Ra:?/i. <^- Schult. syst. 2. p. 177. 

 C. pygmaeus, Nutt. in Amer. phil. trans, (n. ser.) 5. p. 142, not of Cavan. or Rottb. 



Annual? Culms densely cespitose, 1-3 inches high. Umbel often sessile, the inflorescence 

 then consisting of aggregated heads of spikelcls ; but more commonly there are 2-3 short 

 rays. Involucre many times longer than the umbel. Spikelets collected in heads of 8 - 16 

 or more. Scales oblong, gradually allenuated into a long squarrose or recurved point, not 

 Bcarious on the margin. Stamen always solitary in each flower. Style 3-parted. Achenium 

 gray, triangular, with the sides a little convex. 



Banks of rivers and sandy shores of lakes ; northern and western parts of the State. Fl. 

 August. This little plant exhales, when dried, a strong and durable odor altogether like that 

 of Trijolium caruleum. It is widely diftu.sed throughout North America. 



ttt Spikelets few, linear or linear-lanceolate, loosely JUnnered, someiehai convex, inserted in an irregular manner toward the 



summit of the rays : achenium nearly as long as the scale. 



11. Cyperus Schweinitzii, Torr. Schweinitz's Galingale. 



Culm triquetrous, with rough angles ; umbel simple ; rays elongated ; spikelets 6-8, 

 lanceolate, alternate, approximated, somewhat appressed, 6 - 8-flowered, with a setaceous 

 bract at the base of each ; scales ovate, acuminate, mucronate, keeled ; style 3-cleft to the 

 base ; nut ovaie-triquetrous, acute. — Torr. Cijp.p. 276. C. alterniflorus, Schwein. in Long's 

 2d exped. append. 2. p. 381 (not of R. Brown). 



Rhizoma tuberous and knotty. Culm 8-18 inches high, slender ; the upper part rough 

 on the angles. Umbel of 4 - 6 rays, very unequal, the longest rays 2-3 inches in length ; 

 their sheaths truncate, entire. Spikelets irregularly inserted, and somewhat imbricated toward 

 the summit of the ray, forming a loose oblong head. Scales rather rigid, with a broad some- 

 what membranaceous margin, yellowish, slightly mucronate below the tip. Rachilla very 

 narrowly winged. Stamens 3. Style about as long as the nut ; the segments slender and 

 smooth. Achenium light brown, slightly pointed, rather shorter than the scale. 



Dry sandy shore of Lake Ontario, near Braddock's Bay {Dr. Bradley), p'l. August. 



