HEXANDRIA. TRIGYNIA. Rumex. 
455 
Blackw. 262. 
Roots very large, irregular, dark brown without; reddish yellow within. 
Leaves few, on long foot-stalks, rugose, nearly as large as those of rhu¬ 
barb. Plant rising from two to three feet high ; spikes oiflowers whitish. 
Alpine Dock. Mountains, rare. Discovered by Mr. G. Don on the 
Ochill hills, Clackmannanshire, far from any cultivated ground. 
B. May-—June. Hook. Scot. E.)* 
R. hydrolap'athum. Leaves spear-shaped, smooth, acute, very entire, 
tapering at the base: (permanent petals egg-oblong, nearly 
entire, unequally tuberculated: whorls rather crowded, almost 
leafless. E.) 
(j E. Bot. 2104. E.)— Munt. Brit. 1 ; and Phyt. 202— Pet. 2. 1— Ger. 311. 
1 —J. B. ii. 1— Blackw. 490. 
(Seed large, ovate, acute, with thin sharp angles. Sm. E.) Feins of the 
leaves very strong, and nearly perpendicular to the mid-rib. Root white 
within, black without, large, tuberous, very astringent. Stem five or 
six feet high, (when growing on dry land not more than half that height, 
E.) furrowed. Leaves even at the base, a little toothed and waved at the 
edge; (slightly glaucous, tapering at each end, coriaceous, E.) the lower 
ones twelve to eighteen inches long. Leaf-stalks semi-cylindrical, some¬ 
times fifteen inches long. Fruit-stalks encompassed a little below the 
middle with an indistinct ring, in half whorls. Whorls from alternate 
sides of the stem and branches, surrounded by a membranous sheath. 
Calyx one leaf, with three divisions; segments spear-shaped, some¬ 
what concave. Valves slightly toothed, especially towards the base. 
Teeth becoming more evident as the seeds ripen. Beads greenish white 
or purplish, not very obvious in the flowering state, though becoming 
large and conspicuous as the seeds ripen. Summits flat, fringed. 
(It does not appear that any Botanist has been able satisfactorily to iden¬ 
tify R. paludosus of Hudson. From the examination of specimens com¬ 
municated as that plant by the late Mr. Sole, we are inclined to consider 
it to be no other than our present species in an early stage of matu¬ 
rity. E.) 
Great Water Dock. Irish : Capog. Welsh : Tafolin Mr. R. 
Hydrolapathum. Huds. Sibth. With. Ed. 4. Woodv. Relh. Sm. Purt. 
(R. aquations. Lightf. With. Ed. 6. Hook. FI. Brit. Not of Linn, which 
has leaves heart-shaped at the base, according to Sm. E.) This 
gigantic aquatic is found in peat marshes, wet ditches, pools, and sides 
of large rivers, growing generally in the water where it is shallow. 
Rare in the North. About Clifton, Worcestershire. Mr. Ballard. Tam- 
worth, at the foot of Bowbridge, on the Coventry road. (In Cors ddygai, 
and on the banks of the larger rivers, Alaw, &c. Anglesey. Welsh Bot. 
Side of the Avon, near Bidford; river Arrow, near Alcester. Purton. Be¬ 
tween Fowey and St. Austle. Rev. Pike Jones. Near Preston in Skern, 
and at Polam, Durham. Mr. E. Robson, in Winch Guide. Banks of the 
Clyde at Old Kilpatrick. Hopkirk. Side of the Tay near Perth. Mr. 
* (Grows naturally in the Alps, but has long been cultivated in English gardens, and 
known by the name of Monk's Rhubarb. E.) 
