CXI1I. EQUISETACEvE. 
601 
Equisetum .] 
barren, catkin terminal on the stem. E. B. t. 2021 : Newm. 
p. 43. — p’. alpinum; much smaller, with 4 — 5 angles and teeth 
to the sheaths, upper branches abortive, catkin terminal on 
the stem. Newm. p. 49. — y. polijstachion ; branches termi- 
nating in catkins. Willd. : Newm. p. 47 : Bay's Syn. t. 5, f. 3. 
Boggy soils, frequent. — B. and y. not so common. If.. 6, 7. — 
Stems annual. 
7. E. tracliyodon A. Braun ( long-stemmed H.) ; stems branched 
at the base, branches long flexuose simple or again irregularly 
branched towards the apex very scabrous furrowed, sheaths ul- 
timately wholly black with 6 — 13 narrow somewhat persistent 
subulate teeth, catkins terminal mucronate. E. Mackayi Newm. 
p. 25 : Brit. FI. ed. (1 and 7. 
Mountain glens near Belfast, and elsewhere in the north of 
Ireland. Bed of the river Dee, in the parish of Banchory ; Den of 
Airly; Scotland. 11. 7. — Stems perennial. Nearly as rough as the 
following, hut the ramification and the teeth of the sheaths are 
different ; sheaths close. We refer this species to E. tracliyodon of 
Braun on the authority of Mr. Babington, but we have seen no 
authentic specimens. 
8. E. hyemdle L. (rough II ., or Dutch Bushes ) ; stems throw- 
ing up simple branches only from the base very scabrous fur- 
rowed, sheaths black at the bottom and top otherwise whitish 
with 12 — 18 black membranous bristle-pointed teeth, the bristle 
deciduous, catkin terminal mucronate or conical at the point. — 
a. perenne; stems perennial, sheaths close, teeth obtuse, deci- 
duous bristle black. E. B. t. 915 : Newm. p. 17.— 3. ? Moorei; 
stems annual, sheaths loose, teeth truncate, deciduous bristle 
white. E. Moorei Newm. in Phyt. v. p. 19. 
Bogay woods, principally in the middle and north of England. 
Also in Scotland and Ireland. — B. Clay banks facing the sea at 
Rockfield, Co. Wicklow. 11. 7, 8 The circumstance of the stems 
dying down every autumn, in place of remaining over the winter, 
and the loose sheaths, do not appear of sufficient importance to dis- 
tinguish B- as a species : but we have seen no specimens. 
9. E. variegdtum Schleich. (variegated rough II.) ; stems fili- 
form rough branched only at the base with 4 — 10 furrows, 
sheaths green below black above with white or black-edged 
membranous obtuse somewhat bristle-pointed teeth, catkin 
terminal mucronate. Newm. p. 31. — a. stems decumbent 
slender 6 — 8 inches long, teeth of the sheaths cuneate. E. B. 
t. 1987. E. arenarium Newm. — 3. erect stouter 12 to 20 inches 
high, teeth of the sheaths ovate obtuse. E. variegatum Web. et 
Mohr. — y. erect very tall 2 — 3 feet high and more smooth, 
teeth of sheaths short obtuse. E. Wilsoni Newm. p. 39. 
a. Sandy sea-shores. New Brighton, Cheshire ; Bootle, and South- 
port, Lancashire. Portmarnock sands. Sands of Barrie. — B- on 
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