262 Botany of Illinois and Missouri. 
Cyperus inflexus Muhé. Gram. 
Has. NearSt. Louis. July. 
Cyperus strigosus Muhl. Gram. 
Has. Margins of ponds, St. Louis. July. 
TRIANDRIA. DIGYNIA. 
The following grasses were found on the prairies near St. 
Louis, viz. 
Leersia oryzoides Swartz & Muhl. July. 
Agrostis alba Lin. June. 
Alopecurus geniculatus Lin. June. 
Poa reptans Mich. 
Poa reptans, Var. ceespitosa Torrey. June. 
Poa compressa Lin. May—June. 
Poa annua Lin. March—April. 
Elymus glaucifolius Muhl. July 
Panicum latifolium Lin. May. 
Andropogon furcatum Muhl. Gram. 
TRIANDRIA. TRIGYNIA. 
Mollugo verticillata Lin. 
Has. On the prairies in Illinois and Missouri—common. 
July. 
Lechea major Lin. 
Has. Prairies near St, Louis. June. 
TETRANDRIA. MONOGYNIA. 
Cephalanthus occidentalis Lin. 
Haz. Banks of the Mississippi at St. Louis. June. 
Galium circezans Mich. Wet grounds, near 
Galium bermudianum Lin. St. Louis. May, 
Houstonia minima.* 
Root annual? Stem 1 to 11 inches high, erect, simple, 
‘square, a little scabrous. Leaves opposite, spathulate-ovate, 
