Plate 59 . 
EQUISETUM UMBEOSUM, Meyer 8f Willd . 
Blunt-tojjped Horse-tail. 
Equisetum (§ Yernalia) umbrosum; sterile frond terminating abruptly at the 
extremity, its stem (especially upwards) scabrous with prominent points 
and about twenty stride; whorls of branches simple, slender, patent; teeth 
of their sheaths three to four, short, acute, with one rib disappearing before 
the apex; fertile stem without branches, with approximate infundibuliform 
lax sheaths, pale-coloured, terminated by numerous subulate dark-brown 
persistent teeth. 
Equisetum umbrosum. Meyer, in Willd. Enum. p. 1065. Sp. PI. v. 5. p. 3. 
Newm. Brit. Ferns, p. 63 (with a figure'). Hook, et Am. Brit. FI. ed. 8. 
p. 599. Koch, Syn. FI. Germ. p. 975. 
Equisetum pratense. Fhrh. (not Roth). A. Gray, Man. Bot. Illustr. p. 586. 
Benth. Man. p. 620. 
Equisetum Drummondii. Hook. Brit. Fl. ed. 2 .p. 451, and in Engl. Bot. Suppl. 
p. 2777. 
Equisetum Ehrharti, Mey. Chlor. Hanov. p. 666; E. pratense, Elirh. Beitr. 
v. 3. p. 77 {not Roth), Hoffm. Phyt. Bldtt. p. 117. t. 2; and E. sylvaticum 
(3 minus, Retz. Fl. Scand. Suppl. v. 2. p. 12, are referred hither by Koch. 
Hab. Wet places in England, Scotland, and Ireland, rare? (probably often over¬ 
looked or passed by as some other species); Mere Clough, near Manchester; 
Yorkshire; Northumberland ; Westmoreland ; Aberdeenshire; near Forfar, 
and banks of the Isla and Esk, in Forfarshire, extending up the valleys to 
their sources {Thos. Drummond) ; by the Caledonian Canal; Falls of Mo- 
ness; Ochills ; Campsie Grlen ; Bonnington woods, Lanarkshire; Woodcock 
Dale, Linlithgowshire; near Belfast, Ireland, are the localities given in the 
8th edition of ‘British Flora;’ to which Mr. Hewett Watson adds Inver¬ 
ness {Dr. Graham). 
My attention was first directed to this as a new species of 
Equisetum, or at least new to Britain, many years ago, by the 
late Mr. Thos. Drummond, who sent me specimens from Forfar¬ 
shire ; and, not being able to satisfy myself that it was a de¬ 
scribed species, I published it under the name of E. .Drummondii. 
But it has since been satisfactorily ascertained to be identical 
with the E. umbrosum of Willdenow (found in Prussian Pome¬ 
rania), a name which we now adopt. It is most nearly allied to 
E. arvense, but its colour is greener, less glaucous, its stems 
more rough, with closely-set raised points, its angles and its 
branches much more numerous, and the mass of branches is 
