TETRANDRIA TETRAGYNIA. Sagina. 45 



Ditches, ponds, rivulets. Ditch round Christ Church Meadow. Sb. 



Per. June. 



Ls. remarkably waved, saw-toothed, lower ones alternate, all 



stalkless, pellucid, dull-green. Fl. stalks a little longer than the 



Ls. solitary. Fl. tinged with purple; styles purple, anth. 



yellow. Plant under water. 



Ls. and seeds food for ducks. 



P. grdmineus. Grassy P. Leaves linear, tapering 

 downward, with solitary, very slender side ribs. Stem 

 round, forked. Flower-stalks from the forks, scarcely 

 longer than the spikes. E. B. '2,9,53. 



Ponds, ditches. Binsey Common. Ditches by the Road-side, going 

 to Port Meadow. Sb. 



Per. June. 



Plant under water, except the flower. Stem slender, zigzag, much 

 branched. Ls. grassy, alternate, except at the forks, crowded, 

 bluntish, entire. Stip. narrower than the Is. rolled inward 

 cylindrically, pale brown. Spikes egg-shaped, dense, solitary : 

 /. few. 



P. pusillus. Small P. Leaves linear, spreading at the 

 base, opposite or alternate, with solitary, very slender 

 side ribs. Stem round. Flower-stalks axillary, mostly 

 from the side of the stems, many times longer than 

 their spikes. E. B. 215. 



Ponds, ditches. Port Meadow. Sb. 



Per. June. 



Ls. very narrow, stalkless, opposite under every flower-stalk. Stip. 

 membranaceous, spear-shaped, broader than the Is. above each 

 /., stem-embracing. Fl. three or four, greenish, spiked. Stem 

 much branched, slender. Plant under water, except the^. 



P. pectindtus. Fennel-leaved P. Leaves bristle-shaped, 

 single ribbed, parallel, thickly set in two directions ; 

 sheathing at the base. Spikes interrupted. E. B. 

 323. Millefolium tenuifolium. G. E. 828. 



Rivers, ditches, ponds. 

 Per. June. 



Root from a tuberous lump. Ls. flat, very long, alternate. Plant 

 under water, except the stalkless fl. Pet. dull olive : anth. yellow. 



SAGFNA.' Pearl-wort. 



S. procumbens. Procumbent P. Stems trailing, smooth. 

 Leaves minutely pointed. Petals half as long as the 

 calyx. E. B. 880. C. 3. 12. 



' From Sagino, Lat. to fatten ; a name ill-applied to this genus. 



