50 TETRANDRIA. TETRAGYNIA. Sagina. 
^ PERFOLIATE POND-WEED. Slowriversand ponds; 
common. Kirklingtou Mill; Ossiugtoii. P.Jnly, Aug. 
denfum, P. foliis ovatis acuminatls oppasitis confertis, 
caule dichotomo, spica quadriflora. 
P. Leaves egg-Jhaped^ tapering to a point: op- 
ppjite^ crowded: Jlein J'orked: /pike ^-Jlow- 
ered, 
CLOSE-LEAVED POND-WEED. Ditches and slow 
streams. P. J une. 
htcens, P. foliis ovato-lanceolatls planis in petioles 
attenuatis, spica multiflora coarctata. 
P. Leaves very long and^spear^JIiaped^ 
upper ones oppojite, 
SHINING POND-WEED. Rirers and ponds; fre¬ 
quent. P. June, July, 
CTifpum* P. foliis lanceolatis alternis undulatis ser- 
ratis. 
P. Leaves Jpear-JJiaped^ alternate^ or oppo- 
fitCy waved andJerrated, 
CURLED POND-WEED. Ponds and low streams ; 
not uncommon. In the lower pond at Norwood Park. 
P. June, July. 
peetina- P. foliis setaceis parallelis approximatis dis- 
tU7n, tichis basi vaginantibus. 
P, Leaves brijllejhaped^ parallely near to¬ 
gether ^ pointing 2 ways. 
TENNEL-LEAVED POND-WEED. RWers and 
ponds. 1 q the Race of the W'ater-mill, Southwell 
P. July. 
SAGINA. Smith. 199. With. 215. 
Ctz/. tetraphyllus. Petala Caps, unilocularis. 
Calyx i^-leaved. Petals Caps. i-ce}iedy q- 
valvcdy many-feeded. 
