Biological Papers. 101 



Laminodia three-ranked; blades narrow, strongly carinate, and folded over 

 an angle of the stem; sheath at base closed, edges united, enfolding the 

 stem. 



Family 35. Cyperace^e. Sedge Family. 

 Flowers all perfect; rarely with stamens or pistil undeveloped; spikelets 

 few- to many-flowered; involucel scales one or more. Perianth consists of 

 one to six hypogynous scales or bristles or hairs, or is entirely wanting. 



473. Cyperus flavescens L. Yellow Sedge. Low ground, N. E. K. ; 1-3 

 dm. high; not common. August. (A) 



474. Cyperus diandrus Torr. Low Sedge. Marshy places, general; 1-3 

 dm. high; common. August. (AS) 



475. Cyperus inflexus Muhl. Elm-odored Sedge. Sandy alkaline prai- 

 ries, general; about 1dm. high; frequent to common in spots. June. (ASU) 



476. Cyperus pseudovegetus Steudel. Marsh Sedge. Marshes, S. E. K. ; 

 3-12 dm. high; not common. July. (AS) 



477. Cyperus acuminatus Torrey & Hooker. Pointed Cyperus. Moist 

 soil, general; 1-4 dm. high; common. July. (ASU) 



478. Cyperus rotundus L. Nut-grass; Nut-sedge. Sandy fields, E. K. ; 

 2-6 dm. high; not common. July. (ASU) 



479. Cyperus hallii Britton. Big-top Nut-sedge. Fields, S. K. ; 5-9 dm. ; 

 frequent. July. (AS) 



480. Cyperus esculentus L. Yellow Nut-sedge; Chufa. Sandy prairies 

 and fields, general; 3-8 dm. tall; common. Aug. (ASU) 



481. Cyperus erythrorhizos Muhlenberg. Red-root Umbrella-sedge. Wet 

 soil, E. K.; 2-6 dm. high; frequent. Aug. (ASU) 



482. Cyperus speciosus Vahl. Showy Umbrella-sedge. Marshes, tufted, 

 1-4 dm. tall; common. July. (ASU) 



483. Cyperus ferruginescens Boeckeler. Rusty Umbrella-sedge. Marshes, 

 S. E. K.; frequent. Aug. (S) 



484. Cyperus ferax Richard. Coarse Umbrella-sedge. Wet soil, E. to 

 C. K.; 3-8 dm. high; common. July. (ASU) 



485. Cyperus strigosus L. Straw-colored Umbrella-grass. Moist mead- 

 ows, general; 3 -8 dm.; occasional. July. (ASU) 



486. Cyperus ovularis Torr. Pompon Umbrella-grass. Dry hills, N. E. 

 K. ; 2-4 dm. ; common. July. (AS) 



487. Cyperus filiculmis Vahl. Slender Umbrella-grass. Dry hills and 

 fields, general; 5-12 dm. ; common. June. (AS) 



488. Cyperus houghtoni Torr. Pale-brown Umbrella-grass. Dry sandy 

 soil, C. K. ; 3-6 dm.; common. July. (AS) 



489. Cyperus echinatus Wood. Hedgehog Umbrella-grass. Rich sandy 

 soil, E. K.; 2-5 dm. ; common. July. (ASU) 



490. Kyllinga pumila Mx. Low Bur-sedge. Moist soil, E. K.; 1-3 dm.; 

 rare. Aug. (ASU) 



491 Dulichium arundinaceum Britt. (D. spathaceum Pers.) Reed- 

 sedge. Wet places, E. K. ; 3-10 dm. ; occasional. August. (AS) 



492. Eleocharis quadrangulata Roemer & Schultes. Square Spike- 

 rush. Shallow water, Cherokee county, 6-12 dm. tall; not common. July. 

 (ASU) 



493. Eleocharis atropurpurea Kunth. Little Purple Wire-sedge. Wet 

 sands, C. and S. K. ; less than 1 dm. high; frequent in certain spots. Au- 

 gust. (S) 



