146 
Monoecia. 
Lem. Trisulca, Ivy-leaved Duckweed ; with lanceo- 
late proliferous leaves on footstalks. In ditches and pools. 
Lem. Minor , Lesser Duckweed; with sessile leaves, 
plain on both sides, and solitary roots. Very common 
in ditches and pools. 
Triandria, 
Sparganium, Gen. char. — ( 1 ) Cal. three-leaved, 
cor. none. (2) Cal. three-leaved; drupe dry, one 
seeded. 
Spar. Ramosum, Branched Bur-reed ; with leaves 
three-cornered at the base, concave at the sides ; com- 
mon peduncle branched ; stigma linear. Frequent in 
lakes and on the banks of rivers. 
Spar. Simplex, Unbranched Upright Bur-reed ; with 
leaves triangular at the base, plain at the sides, and 
the common peduncle simple. In lakes. 
Car ex. (1) An imbricated catkin, cal. one-valved 
glume; cor, none. (2) Imbricated catkin j cal. one- 
valved glume ; cor. none ; stigmas two or three ; seed 
inclosed in an inflated coat. 
Car. Ovalis, Oval-spiked Carex j with about six oval 
spikes, alternately approaching ; glumes lance-shaped, 
equal to the seed-coat. In marshes and moist mea- 
dows. 
Car. Remota, Remote Carex ; with single, distant, 
nearly sessile spikes ; bracteas very long, exceeding the 
stem ; seed coat nearly entire. In moist woods and 
wet shady ditches. 
Car. Arenaria, Sea-Carex ; with the spikelets crowd- 
