Bot. Arr. — Middlesex; Near Hornsey: Hudson, in FI. Angl. In Harefield 
River, and in a bog on Uxbridge Moor, plentiful : Blackstone, in Spec. Bot. 
p. 20. — Norfolk; Near Lynn, and in other parts of the county: Sir J. E. 
Smith, in FI. Brit. — Northamptonshire ; Near the bridge entering Brockhall 
Lawn from Norton: Mr. Griffith, in Withering. — Northumberland; At 
Prestwick Carr : Winch’s Guide. — Staffordshire ; About a mile from Stafford, 
in ditches adjoining the foot-road to Aston : Dr. Withering, in Bot. Arr. — 
Suffolk; About Bungay, very common : Mr. Woodward, in Bot. Guide. — 
Yorkshire; In the lakes on Brigstear Moss, about four miles from Kendall, 
plentiful: Mr. Curtis, in FI Lond. — In rivers and rivulets about Castle Ho- 
ward : Mr. R. Teesdalf, in Trans of Linn. Soc. v. ii. p. 104. Near Rother- 
ham : Mr. Langley, in Loud. Mag. of Nat. Hist. v. ii. p.269. — WALES. 
Flintshire ; In ditches adjoining Rhyd Marsh, near Prestatyn : Mr. Griffith, 
in With. Bot. Arr. — Berwick-upon-Tweed ; In the Leet below Belville Farm, 
in the parish of Eccles : Rev. A. Baird, in FI. of Berwick. Lithtillum Loch 
and Ferneyrig Marsh: Mr. R. D. Thomson, ibid. — SCOTLAND. Lochend 
and Duddingston Loch near Edinburgh : Mr. Brown, in With. Bot. Arr. — 
Castle Semple Loch near Glasgow : Mr. Hopkirk, in Hook. FI. Scot. — About 
Forfar : Mr. G. Don, ibid. — Loch of Clunie, and Marsh of Bonachalley : Mr. 
Arnott, ibid. — IRELAND. Plentiful in the ponds in Mr. White’s demesne 
at Woodlands : Mr. J. T. Mackay, in Catal. of Plants of Ireland. 
Perennial. — Flowers in May and June. 
Root creeping, white, throwing out numerous slender fibres from 
the joints. Stems numerous, rising a foot or more above the water, 
upright, simple, round, smooth, striated, jointed, spongy, with a 
central column containing spiral vessels. Leaves from 8 to 10 or 12 
in a whorl round each joint of the stem, sessile, narrow, strap- 
shaped, from half an inch to three quarters of an inch, or more, long, 
somewhat callous at the points, quite entire, without nerves. Flowers 
very simple, sessile, one at the base of each of the upper leaves, the 
lower ones often without stamens. Calyx very minute, forming a 
slightly elevated rim on the top of the germen. Filament attached 
to the inside of the calyx, at first very short, (fig. 1.) but afterwards 
becoming as long as the pistil, (fig. 2). Anthers very large, of two 
roundish lobes, when young having the style passing between the 
lobes, (fig. 1). Style short, naked. Stigma tapering to a point, 
white and downy when magnified. Germen inferior, oval. Fruit 
a small 1-celled nut, (fig. 3.) containing a single, inverted seed. 
Dr. Hooker informs us, in his British Flora, that in deep 
streams of water connecting the little Lakes, or Broads, at Surling- 
ham, Norfolk, he had had this plant pointed out to him, by Mr. 
Deere, 2 and 3 feet long, with the leaves excessively crowded, 3, 
and even 4 inches long, pellucid, with an opaque nerve, their points 
not callous ; the whole plant submerged, and consequently barren. 
On Ben-y-gloe, in Scotland, at a considerable elevation above the 
sea, the same distinguished Botanist found a variety, the opposite 
extreme of this, scarcely 4 inches high, and apparently the Hippuris 
montana of Reich Ic. t. 86. 
According to the observations of LinNjEUS, goats will eat this 
plant, but cows, sheep, horses, and swine refuse it. Gmelin says, 
that wild-ducks in the North feed upon it ; and it is reputed to assist 
in purifying the air in standing water, marshes, &c. — A transverse 
slice of the stem (fig. 4.) is a beautiful microscopic object. 
