16 
DIANDRIA, MONOGYNIA, 
IT. CiRCiEA. Gen. pi. 31. (Onagrcd.J 
lutetiana* 
/ 3 . 
ranadensit* 
Fursh, 
minor* 
^olyrhizas 
Cal. short, 2-parted. Petals 2. Stigma emar- 
ginate. Caps, ovate, hispid, 2-celled, not 
opening ; cells 1 -seeded. Nutt. 
1. C. stem erect, leaves ovate, denticulate, opake, 
somewhat smooth. Vahl. 
Icon. Eng. hot. 1056 ? (Pursh). 
Enchanter^s Nightshade. 
From one foot to eighteen inches high. Flowers small, 
reddish -white. Very common in damp shady w'oods, and 
particularly abundant along the Schuylkill, towards the falls. 
Perennial. July. 
18. Lemna. Gen. pi. 1400. (" ITajades.J 
Cal. of one entire leaf. Stamens alternately 
developed, seated upon the ovarium at its 
base. Style cylindric, stigma funnel-form. 
Capsule 2 to 4-seeded. Nutt. 
-1. L. leaves elliptical, flat both sides, cohering at 
their base ; roots rarely solitary. Willd. 
Icon. Eng. hot. 1095. 
Duck-weed. Duck-meat. 
A little floating aquatic plant of a beautiful green colour, 
covering the surface of stagnant waters and ditches. Leaves 
the size of a large spangle, two or three cohering together at 
their base. Flowers very minute proceeding from a pouch- 
iike marginal division of the lamellae of the leaves. Very com- 
mon ; and always abundant where found. In a pool, three or 
four squares south of the Pennsylvania Hospital ; and near Ken. 
sington, most abundant. Ducks greedily devour it — hence 
its name. Annual- June. 
2. L. leaves elliptical flat, cohering at their base, 
roots bundled. Willd. 
Icon. Vail. par. t. 2p. f. 2. (Pursh). 
