346 MONOECIA— TRIANDRIA. 



HAB. Wet meadows. May. Culm 12 in. kigh> 

 fert. spik. mostly 3, thick, pale gr. 



72. C. hystericina : sterile spike pedunculate ; fertile 

 2 — 3, thick, at length cernuous, upper one in- 

 clusely pedunculate, the rest on exsert peduncles ; 

 fruit ovate, inflated, subhorizontal, many-nerved, 

 rostrate, orifice bifid, twice as long as the oblong 

 awned glume. 



II AB. Wet meadows. May. Culm 12—18 in. 

 high; fert. spik. 1 in. long; plant yell. -gr. 



73. C. Pseudo-cyperus : fertile spikes 4, cylindrical, 

 pedunculate, upper ones subgeminate ; fruit ob 

 long-lanceolate, rostrate, reflexed, many-nerved, 

 apex divaricately bifid. 



HAB. Swamps. June. CuTm 2—3 ft. high, thick : 

 spik. 2 in. long, dense. 



74. C. limosa : fertile spikes mostly 2, ovate or ob- 



long-ovate, pedunculate, somewhat distant, pen- 

 dulous ; fruit suborbicular-elliptic, compressed. 

 with a very short rostrum, (green,) orifice entire, 

 as long as the ovate mucronate glume. 

 HAB. Sphagnous swamps. June. Culm 9 — 15 

 in. high; glum, variable, ovate, oblong, acum. or 

 cuspid, often very long. 



| | Staminiferous spikes 2 or more. 



1. With 2 stigmas. 



75. C. cespitosa : sterile spike subsolitary (or gemi- 

 nate ;) fertile mostly 3, cylindrical, obtuse, dis- 

 tant, the lower en a short exsert peduncle ; bract? 

 strict; fruit ovate, somewhat acute, densely fruit- 

 ed in about 8 rows, orifice minute ; longer than 

 the ovate (black and margined) glume ; leaves 

 spreading. 



IIAB. ^fountain bogs. Culm 12 — 18 in. high; 

 leav. dark gr. ; fr. qr. nerveless. 



76. C.crinita: sterile spikes geminate, (sometimes 

 androgynous ;) fertile 4, distant, pendulous, cylin- 

 drical, dense ; fruit roundish-ovate, ventricose. 

 slightly rostrate, orifice entire, much shorter than 

 the lu.ear glume. 



