I.ightf. FI. Scot. v. i. p. 283. — Sibth. FI. Oxon. p. 167. — Abbot’s FI. Redf. p. 
117. — Davies’ Welsh Bot. p. 53. — Purt. Midi. FI. v. i. p.251. — Relh. FI. Cant. 
(3rd ed.) p. 215 — Hook. FI. Scot. p. 169.-*Grev. FI. Edio. p. 120. — FI. Devon, 
pp. 90 & 192. — Rev. G E. Smith’s PI. of South Kent, p.29. — Winch’s FI. of 
Northumb. and Durham, p. 36. — Walk. FI. of Oxf. p. 149. — Don’s Gen. Syst. 
of Gard. and Bot. v. i. p. 126. — Burnett’s Outl. of Bot. v. ii. p. 846. — Pprrv’s 
PI. Varvic. Select®, p. 45. — Curt. Brit. F.ntom. v. xi. t. 485. — Bab. FI. Bath, 
p. 3. — Mack. Catal. of PI. of Irel. p. 51. — Castalia speciosa, Salisbury, in An- 
nals of Botany, v. ii. p. 72. 
Locai.itifs.— In lakes, ponds, and slow rivers. — Oxfordsh. Very common 
in the neighbourhood of Oxford ; in the Isis, and the Cherwell. and also in most 
of the pools and deep watery ditches in their vicinity. — Berks ; In ponds, and 
slow deep rivers, plentiful : Dr. Noihfdfn. In the Isis, and in ponds and deep 
watery ditches near it: W.B. — Bedfordsh. In rivers, common : Rev. C. Abbot. 
— Bucks ; In a small bay near Upper Hope, on the Thames near Eton: Mr. 
M a ttnroT. — Cambridgesh. In the water-course on the side of the road between 
Barnwell and Hinton : Teversham Moor; Triplow Heath, Anglesey Abbey, &c.: 
Rev. R. Rei.han. — Cornwall ; Marazion Marsh : Mr. Stack noose. — Devon ; 
In marshes and canals at Powderham, hardly wild : FI. Devon. — Dorset; Be- 
tween Blandford and Durweston ; common in the rivers Stour and Avon: Dr. 
Pultenfv. — Kent; In narrow dykes at Ham-ponds near the village ; where 
this noble plant is banished from the wide and pure streams, to associate with 
the humble sparganium natans, Hydrocharis, and Lemnte : Rev.G. E. Shu h. — 
Essex; Near Luxborough House; and Pissingford Bridge: Mr. Warner. — 
Lancash. More frequent in ponds about Liverpool than Nuphar lutea: Dr. 
Bostock. — Norfolk; In rivers and lakes, common: Mr. Woodward. — 
Northumberland ; In Greenley and Bioomley Lakes, near Shewing Shields. 
In Grinden Lake: Wallis. Naturalized in the ponds at Wellington : N. J. 
Winch, Esq. — Notts ; In the Great C'heney-pool, and in a ditch between Len- 
ton and Beeston : Dr Deerino. — Shropsh. In Snowdon Pool near Bridgnorth : 
H. Bidwei.l, Esq. — Somersetsh. Frequent in ponds, &c. : Dr. Bostock. In 
the basins of the canal near Bath: Drs. Heneac.f. and Gibbis. — Staffordsh. 
In the large Pool at Patshull: Dr. Wciherinc and H. Biowell, Esq. In the 
River Sow, near Stafford: Dr. Withering. — Suffolk; In livers and lakes, 
common: Mr. Woodward. — Surrey; In rivers and ponds: Mr. W. Pamplin, 
jun. — Warwicksh. In a pond at Ragley : T. Puhton, Esq — Worcestersh. In 
the Avon, under Littleton Bank, according to Mrs. George Pmirott. Rare 
in a truly wild state in this county : Mr. Edwin Lees, in Illust. of the Nat. Hist, 
of Worcestersh. p. 166. — Yorksh. Near Sheriff Hutton, and in the River Foss: 
Teesdalf. Mere, near Scarborough : Mr. Travis. Thirsk, near Richmond : 
Mag. Nat. Hist. v. iii. p 169. — WALES. Anglesey ; Both in pools and larger 
rivers, frequent: Rev. H. Davies. — JERSEY. Abundant: Miss Perry. — 
SCOTLAND. In lakes and ditches, very frequent. Seen to the greatest per- 
fection in the little bays and inlets of pellucid alpine lakes; in Loch Lomond 
acres are densely covered wilh it: Dr. Hooker. I.ochend, Edinburgh: Mr. 
Mauchan. Near Glasgow: Mr. Horkirk. — IRELAN D. In lakes, not un- 
frequent. Lough Dan and Glandeloughg county of Wicklow ; lakes about 
Killarney, and in Cunrtamara, plentiful. 
Perennial. — Flowers in June, July, and August. 
Trunk of the Root large and fleshy, horizontal, producing, from 
the under side, many long, stout radicles, which are fibrous at the 
extremity. Leaves on long, cylindrical petioles, floating, 8 or 10 
inches wide, oval-heart-shaped, the lobes at the base roundish, 
nearly parallel, or close together, quite entire, smooth, bright green 
on the upper surface, paler on the under, with radiating veins 
which are not prominent. Flower-staChs cylindrical, smooth, their 
length depending on the depth of water in which they grow. 
Flowers large, white, and very handsome, being sometimes, when 
fully expanded, 5 or 6 inches in diameter. Calyx (see pi. 1. f. 2, a.) 
of 4 oblong, blunt, spreading, smooth sepals ; of a yellowish-green 
colour on the outside, with a white edge ; white within. Corolla 
(see pi. 1. f. 2, b.) of many oblong, somewhat inversely egg-shaped, 
white petals, (see pi. 2. f. 1 , a.) which gradually diminish in size 
towards the centre. Filaments (see pi. 2. f. 1, 6.) numerous, flat. 
