I House. I. Male. Monoec. Monand. 
Wet Ditches, June, A. Common. 
646. Brittle Stone-^wort. — C. tomentosa. 
Prickles on the stem ovate. — Johnson’s Ge- 
rard. 1115. 
Ditches, Bogs, June> A. Rare. 
Clapham Springs^ — Stevington Bogs, 
Ohs : 
Plant more compact in it*s habit than the former^ when lit- 
Jlesh'Colored : dead^ ashy white. 
I House. II Males. Monoec. Diand. 
Duckweed. Lemna. Gen. PL 1400. 
Male. — Cup of i leaf. Blossom none. 
Female. — Cup of i leaf. Blossom none. 
Style I. Capsule 1 cell, 
647. Ivy-leaved Duckweed. — L. trisulca. 
Leaves on leafstalks, spear-shaped. 
Ditches, August, A. Common, 
648. Least Duckweed. — L. minor. 
Leaves sitting, flattish on both sides, root 
single. — Ray’s Synopsis.. IV. i. 
Ditches, June, A. Common. 
Ohs: 
The single root and flat leaves at once- dernoTistr ale this species. 
Hunched 
