JULY. 289 
a curious shaped seed, of a light brown, streaked with black, 
three-sided and large for the size of the plant. 
Potyconum convotvutus. Climbing Buck-wheat. Fre- 
quent in corn-fields, twining amongst the corn, sometimes 
growing to a great length. The leaves are heart or arrow- 
shaped. Flowers greenish, on very long stalks, and numerous. 
Seeds three-sided. 
Potyconum ampHisium. Amphibious Persicary. A 
handsome species, growing by and in ponds, lakes, and 
ditches. Stem from two to three feet long, with numerous 
long smooth leaves, arising from sheaths upon the main stalk. 
Spikes of flowers, mostly terminal, of a bright rose-colour, 
and raising themselves above the water. Stem often taking 
root at intervals between the leaves. 
DECANDRIA. DIGYNIA. 
THALAMIFLORZ. CARYOPHYLLACESX. 
SAPONARIA, (Soapwort.) 
Generic Character. Calyx tubular, five-toothed, without 
bracteas at the base. Petals six. The claws as long as the 
calyx. Seeds globular, or kidney-shaped. 
U 
