516 
99. EQUISETACEiE. 
and 3— 4-toothed sheaths, their lowest joint (including its 
terminal sheaths) exceeding the st.-sheatk ; general outline 
narrowed upwards, usually naked at the end. Fertile st. 
short, with few (4 — 5) sheaths, appearing before the sterile 
ones. Sterile and fertile st. distinct. — ^. alpestre (Wahl.) ; 
sterile st. short (2 — 3 in.) prostrate with ascending terminal 
point and secund suberect branches. — Damp meadows 
[cultivated lant', &c.] /i. Mickle Fell, Teesdale. P. IV. E.S.I. 
2. E. pratense (Ehrh.) ; sterile st. with about 20 striae very 
rougJi with 2^f'oritinent jmints particularly above^ branches 
simple with 3 or 4 simple angles, teeth of sheaths l-ribbed hiit 
not to the tip, fertile st. simple with many crowded deeply 
toothed sheaths. — E. umhrosum, II. F. 59. ;S'. 2. N. 63. E. 
Drummondii E. B. S. 2777. — Sterile st. 1 — \\ ft. high, nearly 
naked below ; with many whorls of slender solid branches in 
the upper part, having 3- or 4-toothed sheaths, their lowest 
joint and sheath falling short of the st. -sheath ; general out- 
line remarkably hlunt. Branched fertile st. with larger 
sheaths and whorls of about 6 branches • simple fertile st. 
short (4 — 6 in.), with many loose and still larger yellowish- 
white sheaths with black prominent ribs upwards and 12 — 20 
teeth.— Wet places, rare. P. IV. E. S. I. 
3. E. Telmateia (Ehrh.) ; sterile st. nearly smooth with about 
30 striae and branches, branches rough doubly angular simple, 
teeth of sheaths 2-ribbed, fertile st. simple with many crowded 
large deeply-toothed sheaths.—//. 58. S. 3. JV. 67. E. 
ftuviatile Sm. not Linn., E. B. 2022. — Sterile st. 3 — 6 ft. high ; 
occasionally bearing a small terminal spike ; furnished from 
top to bottom with whorls of slender solid branches with 4 
longitudinally furrowed angles and 4-toothed sheaths, their 
lowest joint and sheath exceeding the st.-sheath. Fertile st. 
stout, 1 foot or more high, with many very long pale-brown 
sheaths with 30 — 40 teeth ; spike large. '\_e. Uraunii (Miide), a 
form with deeply furrowed sterile st., was collected in Forfar by Mr W. Gardiner.] 
—Wet places. P. IV. E.S.I. 
** Sterile and fertile st. subsimilar, contemporaneous, branched, 
4. E. sylvat'icnm (L.) ; sterile and fertile st. with about 12 
furrows and many whorls of slender compound spreading or 
dejlexed solid brandies, sheath lax ending in 3 or 4 blunt lobes. 
—E. B. 1874. //. F. 61. S. 4. N. 59.— St. 12—18 in. high. 
Sheaths of the branches with 3 long acute teeth each l-ribbed to 
its tip. Fertile st. occasionally simple. Spike blunt. General 
outline of sterile st. usually pyramidal, of fertile abrupt. — 
