MONOEC1A TRIANDFIA. 4H5 



ones subgennnate ; fruit oblong-lanceolate, rostrate, reflexed, many- 

 nerved, apex divaricately bifid. 



HAB. Swamps. June. Culm 2 3 feet high, thick ; spikes 2 inches 

 long, dense. 



t t Staminiferous spikes 2 or more. 



1. With 2 stigmas. 



C. cespitosa: sterile spike subsolitary (or geminate;) fertile mostly 3, 

 cylindrical, obtuse, distant, the lower on a short exsert peduncle ; bracts 

 strict ; fruit ovate, somewhat acute, densely fruited in about 8 rows, 

 orifice minute ; longer than the ovate (black and margined) glume ; 

 leaves spreading. 



HAB. Mountain bogs. Culm 12 18 inches high ; leaves dark green ; 

 fr. gr., nerveless. 



C. crinita : sterile spikes germinate, (sometimes androgynous ;) fertile 

 4, distant, pendulous, cylindrical, dense ; fruit roundish-ovate, ventri- 

 cose, slightly rostrate, orifice entire, much shorter than the linear 

 glume. 



HAB. Swamps. June. Culm 2 4 feet high; leaves pale green ; 

 spike 2 3 inches long. 



C. acuta: sterile spikes 1 3; fertile mostly 3, subpeduiiculate, some- 

 what nodding, cylindrical, remote ; fruit oblong, entire at the orifice, 

 as long as the oblong acute glume. 



HAB. Wet meadows. Culm 2 feet high, sharply triquetr. ; glume 

 br. ; fr. nerveless. 



2. With 3 stigmas. 



C. vesicaria : sterile spikes 3 ; fertile mostly 2. pedunculate, cylindrical ; 

 fruit oblong, inflated, acuminate-rostrate, bicuspidate, longer than the 

 lanceolate glume ; culm acutely triquetrous. 



HAB. Wet meadows. May. Culm 2 feet high ; spike dense, 2 3 

 in. long. 



C. pdlita : sterile spikes 2, oblong; fertile 2, cylindrical, remote, erect, 

 upper one sessile ; fruit ovate, subtiiquetrous, short rostrate, hairy, bi- 

 cuspidate, equal to the gblong awned glume. 



HAB. Wet meadows. May. Culm 2| feet high; leaveg subrigid, 

 flat. 



C. lacustris : sterile spikes about 4 ; fertile 2 3, erect, oblong-cylin- 

 drical, short pedunculate; fruit oblong, many-nerved, subrostrate, 

 smooth, bifurcate, somewhat longer than the oblong mucronate glume. 



HAB. Deep swamps. June. Culm 3 5 feet high, leaves broad ;fr. 

 brown. 



370. TRIPSACUM. Sesame grass. 



T. dactyloides : spikes numerous, (3 4,) aggregate ; florets sterile near 



the summit, fertile at the base. 

 HAB. Sea-side. Aug. 7].; culm 5 7 feet high; spik, large; site. 



long, pur p. 



b. monostachyon : spike solitary. 

 HAB. With the preceding. 

 38 



