Equisetum .] 
FERNS. 
G3 
The name Fluviatile is not so applicable to this species as it would have 
been to some others; it is rarely found on the banks of rivers or ponds, nor do 
I remember ever having seen it growing in the water. It rather affects strong 
loamy damp ground, clayey banks, and swampy bogs. 
Hab. — Very abundant in some parts of England, as about London, in Hants, 
Bucks, &c.; but Mr. Watson thinks scarcely a common plant generally. 
Geo. — Europe, Siberia, North America. 
2.— EQUISETUM DRUMMONDII. 
BLUNT-TOPPED HORSE-TAIL. 
(Plate 5, fig. 8.) 
C'iia. — Barren stem blunt, erect, with about 12 branches. Fertile 
stems with 5 or 6 prickly-toothed sheaths. 
Syn. — Equisetum Dmmmondii, Hook, in E. B. suppl. Mack., FI. Hib. 
Fig. — E. B. suppl. t. 2777. 
Des. — Barren stem exceedingly delicate, finely tapering upwards, 
very rough on the angles, with white and shining particles of silex, 
12 inches high, of a pale, lightish green, particularly the scales, 
which widen upwards, 6 or 8 in number, rather close together, with 
long, black, terminal teeth. 
This plant differs from Equisetum arvense in its more glaucous green color, 
very much more delicate habit both of stem and branches, and blunter outline. 
The fertile frond is much more rigid in texture, with harder, whiter, and more 
numerously-toothed sheaths, and the points of the teeth are moro diaphanous 
than in the next species. 
Hab. — First found by Mr. T. Drummond at Wolf Hill, the seat of W. 
Thompson, Esq., near Belfast. 
3.— EQUISETUM ARVENSE. 
CORN HORSE-TAIL. 
(Plate 5, fig. 9.) 
Cha. — Barren stem taper-pointed, decumbent. Sheaths of the 
fertile stem 3 or 4, distant, loose. 
Syn. — Equisetum arvense, Linn., Willd., Smith, Hook., Bolt., Ehrh., Huds., 
Light/., With., Pnrsh, Mack., Gray . — Equisetum segetale, Ger. 
Fig.— E.B. 2020. —Bolt. 34 .—Flo. Lon. 64 .—Ger. Her. 1114.— Park. 1202. 
Des. — Root branched, creeping. Main stem of the barren frond 
procumbent, tapering to the end, sometimes very long, pointed, 
rough, with whorls of branches all the way down, and forked at the 
base ; that is to say, two or more fronds springing from the same 
part of the root. Branches simple, varying much in number, 14 or 
