416 
98. EaUlSETACEJi. 
/i/j, fertile st. simple •with many crowded deeply toothed sheaths. 
—S. 2. N. 03. E. Drummondii Hook., E. B. S. 2777.— Sterile 
St. 1 — 1| ft. high, nearly naked below; with many whorls of 
slender branches in the upper part, ha\ing 3- or 4-toothed 
sheaths, their lowest joint and sheath falling short of the St.- 
sheath ; general outline remarliahlxj blunt at tlie top. Branched 
fertile st. with larger sheaths and whorls of aboxit 6 branches ; 
simple fei-tile st. short (4 — 6 in.), -with many loose and still 
larger yellowish -white sheaths with black prominent ribs up- 
wards and 12 — 20 teeth. — Wet places, rare. P. IV. E. S. I. 
.3. E. max'imum (Lam.) ; sterile st. nearly smooth with about 
30 striae and branches, branches rough doubly-angular simple, 
teeth of sheaths 2-Hbbed, fertile st. simple with many crowded 
large deeply toothed sheaths. — Bull. Soc. Bot. de Fr. viii. G37. 
E. Telmateia Ehi-h., S. 3. N. 67. E.flmiatile Sm., E. B. 2022. 
— Sterile st. 3 — 6 ft. high ; occasionally bearing a small terminal 
spike ; furnished from top to bottom with whorls of .slender 
branches which have 4 angles each yidth a longitudinal furrow 
and 4-toothed sheaths, their lowest joint and sheath exceeding 
the st. -sheath. Fei-tile st. stout, 1 foot or more in height, with 
many pale-brown sheaths with 30 — 40 teeth ; spike large. — 
Wet places. P. IV. E. S. I. 
** Sterile and fertile stetns sijnilar, conf-empwaneotts, branched. 
4. E. syhat'ictim (L.) ; sterile and fertile st. with about 12 
furrows and many whorls of slender compmind spreading m- 
drflexcd solid branches, sheaths lax ending in 3 or 4 blunt lobes. 
—E. B. 1874. -S'. 4. N. .59.— St. 12—18 in. high. Sheaths of 
the branches with 3 long aeiitc teeth each \-ribbed to its tip. 
Fertile st. occasionally simple. Spike blimt. General outline 
of sterile st. pyi-amidal, of fertile abrupt.— Wet shady places. 
P. IV. V. E. S. I. 
*** Stems of one kind, with or mthout simple hoUoto whorled 
branches. 
5. E. Kmdsum (L.) ; stem nearly smooth with many slight 
furrows, teeth of sheaths short rigid acute, branches sitnple 
whorled or none. — St. 2 — 4 ft. high. Sheaths rather short. 
Spike blunt. — a. E. limosum (L.) ; st. smooth, barren st. nar- 
rowing graduall}^ upwards, branches short rigid slightly tapering 
upright and equalling the joints of the st. from green sheaths 
often wanting. — /3. E.Jluviatile [lu) ; st. subglabrous, barren st. 
with a lax whiplike end, branches long slender tapering lax 
exceeding the joints of the st. from dark-brown sheaths rarely 
wanting. — In stagnant water. P. VI. VII. E. S. \. 
(5. E. pulus'tre (L.) ; st. with 4 — 8 dc/p furrows branched 
