38 
IV Males. IV Females. Tetr. Tetr. 
Leaves spear-shaped, flat, ending in leaf- 
stalks. — Flora Danica. 195. Sowerby. 376. 
Rivers, July, P. Common. 
13 1. Torked Pondweed. — P. densum. 
Leaves ovate, pointed, opposite, crowded, 
stems forked, spike containing 4 flowers. — 
Sowerby. 397. 
Ditches, June, P. Rare. 
Ford^End, 
Obs: 
One Jlozder arises from the fork of the stem^ sitting on a 
short fruit-stalk, and resembles the flouer of the Adoxa, 
132. Flat-Stalked Pondzveed, — P. compressum. 
Leaves strap-shaped, blunt, stem flatted. — 
Flora Danica. 203. Sowerby. 418. 
Ditches, June P., Rare. 
Ditih near Fenlake Osier-holts, 
133. Curled Pondzveed, — P. crispum. 
Leaves spear-shaped, alternate or opposite, 
waved, serrated. — Curtis. V. 15. ad- 
mirable. 
Rivers and Ponds, June. P. Common. 
134. Fennel-leaved Pondzveed, — P. pectinatum. 
Leaves bristle-shaped, parallel, approaching, 
in 2 rows. — Sowerby. 323. 
Rivers 
