78 
PERNS. 
[ Equisetum . 
4.— EQUISETUM SYLVATICUM. 
WOOD HORSE-TAIL. 
(Plate 9, fig. 4.) 
Cha. — Stem erect. Branches compound, deflexed. Sheaths loose. 
Syn. — E quisetum sylvaticum of all modern botanists. 
Fig. — E. B. 1874 .—Bolt. 32, 33.— Flo. Dan. 1182 .—Schk. fil. 1G6. 
Des. — Stem erect, from 6 inches to 2 feet high, branched, bright 
green. Branches compound, slender, smooth, drooping at the ends, 
and whorled, the lower part of the stem without branches. Catkins 
ovate, erect, stalked, and terminating the stem, borne early in the 
season, and dying away long before the remaining part, as is the case 
with all the following species ; it is very rarely, however, found in 
fruit. Sheaths deeper colored than the stem. 
Sit. — In woods and shady places, chiefly in the North, 
Hab. — Rosshire and Moray, Rev. G. Gordon. Orkney, Rev. C. Clouston. 
Frequent in the Highlands of Scotland, Mr. TV. Wilson. Near Richmond, 
Yorkshire, Mr. Ward. About Settle, Yorkshire, (scarce), Mr. J. Tatham. 
Near Leeds, Mr. Denny. Forge Valley, near Scarborough, Yorkshire ; near 
the ruins of Dale Abbey, and Southwood, near Calke Abbey, Derbyshire, Rev. 
A. Bloxam. Egerton, near Bolton, Mr. W. Christy. Cumberland, Cheshire, 
Lancashire, Mr. Watson. Benthal Edge, Salop, Mr. W. Leighton. Cromford 
Moor, Derbyshire, Dr. Howitt. In Bagley Wood, between Oxford and Abingdon, 
Mr. W. Baxter. Hampstead Heath and fields towards Hendon, Middlesex, Mr. 
W. Pamplin. Sussex, Rev. G. E. Smith. Somerset, Mr. Southhy. Moist 
woods, Kelly’s Glen, Ballynaseorny, Mr. O. Kelly. Abundant in the North of 
Ireland, Mr. Mackay. 
Geo. — All Germany, Prussia, Holland, and Switzerland. From New York to 
Virginia, &c., and in North Asia. 
5.— EQUISETUM LIMOSUM. 
SMOOTH NAKED HORSE-TAIL. 
(Plate 9, fig. 5.) 
Cha. — Stem erect, naked or branched, smooth. Sheaths short, 
appressed. Teeth numerous. 
Syn. — Equisetum limosum, Linn., WilUl., Smith, Hook., Bolt., Huds., Light/., 
With., Mack., Gray . — Equisetum polymorphum, Schr . — Equisetum 
heleocharis, Ehrh. 
Fig.— E. R. 929 —Flo. Dan. USA.— Bolt. 38. 
Des. — Root much creeping, with scattered fibres. Stem erect, 
quite smooth, striated, but not channelled, generally naked, hut 
sometimes putting out a few branches late in the season, which arc 
smooth, simple, and ascending. Catkin terminal, broad and short, 
for the most part sessile in the upper sheath. Sheaths short, close 
pressed to the stem, with very numerous short brown teeth. 
