2 
MONANDRIA. MONOGYNIA. Ohara. 
MONOGYNIA. 
CHAU A.* Berry many-seeded. Style none. E.) 
C. tomento'sa. Prickles on the stem egg-shaped. 
II. Ox. xv. 4. 9—Pluk. 29. 4. 
Plant always flesh-coloured when alive, but when dry, ash-coloured. 
Stem twisted. Linn.- Brittle and gritty in the mouth. Root fibrous. 
Brittle Stonewort. (C. hispida /3, FI. Brit. Smith seems to think this 
plant scarcely differs from C. hispida; and that Linnaeus was rather 
hasty in the appropriation of synomms. E.) Ditches and pools. Peat 
ditches in Lancashire and Westmoreland, common. In the rivulet that 
runs from Malham Tarn before it sinks into the ground. Mr. Wood. 
(On a bog nearly opposite the house of Alyn Bank, near Mold, Flintshire. 
Mr. Griffiths. In wet pits where turf has been dug on Feckenham Bog, 
Worcestershire. Purton. E.) 
C. vulgaris. Stems without prickles: leaves toothed on the inner 
side. 
E. Rot . 33 6—Hedw. Th. 32. 33-C. B. Pr. 25; and Th. 251—Park. 
1201. 10— J. B. iii. 731. 2. 
Stem, thread-shaped, but little branched, six to nine inches long, flexible. 
Leaves thread-shaped, tapering, but just thinner than the stem; in 
whorls, expanding, mostly as long as the joints of the stem, jointed; the 
knots with prickles and often fructifications on the inside. Flowers either 
perfect, or barren, or fertile, sessile, on the same, or on different plants ; 
both tawny and white in the same plant, on the inner side of the leaves 
towards their base, two or three on a leaf, numerous on the upper whorls, 
distinct. Cal. leaves bristle-shaped, the two outer nearly twice as long. 
Anther protruding out of the calyx; evidently adhering to the base of the 
germen, and separable with it; unchanged in its form, and none burst in 
numbers which I examined, from whence some might be induced to sus¬ 
pect it to be rather a nectary. Seed-vessel tapering and greenish towards 
the end, which is crowned with five teeth, mostly shorter, but sometimes 
longer than the calyx. Seeds numerous, and minute, yellowish, or white. 
In one barren plant I found the calyx the same as in the perfect flowers. 
St— Plant green when fresh, extremely fefid; glaucous when dry, and 
very brit le. Leaves sometimes ten or twelve in a whorl. Woodw. 
(. Leaves from six to twelve in a whorl. The teeth or prickles on the 
upper or inner side of the leaves are near the base, and more numerous 
on the upper than on the lower leaves. The stem and leaves are studded, 
not uniformly incrusted, with a hard, whitish, gritty (calcareous) sub¬ 
stance, which gives them, when fresh and magnified, some resemblance 
to the scaliness of a snake. The stems are much disposed to twist 
spirally. E.) 
Common Stonewort. Fetid Water Horse-tail. (Irish: Clo Isk. 
Welsh: Rhawn y ebol cyjfredin. E.) Ditches and pools. A. July—Aug. 
Var. 1. Smaller. Huds. 
Stems and leaves very slender. Seeds (anthers and germens) small, brown, 
shining, lying naked on the joints of the leaves. R. Syn . (Smith suspects 
(Xupa, joy; or delight of the water. E.) 
