EQTJISEnjM. 449 



(4 — 5) sheaths, appearing before the sterile ones. Sterile and 

 fertile st. distinct. — /3. alpestre (Wahl.) ; sterile St. short (2—3 

 in.) prostrate with ascending terminal point and secund svih- 

 erect branches. — Damp meadows. 8. Mickle Fell, Teesdale. 

 P. IV. E. S.I. 



2. JE. p-aten'se (Ehrh.) ; sterile st. with about 20 striae veiy 

 rough mith prominent points particularly above, branches simple 

 with 3 or 4 simple angles, teeth of sheaths 1-rihhed hut not to the 

 tip, fertile st. simple with many crowded deeply toothed sheaths. 

 ~E.umbrosum,II.F.tQ. S.2. M.GS. E.BrummondiiE.B. S. 

 2777. — Sterile st. 1 — IJ 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 ; generaloiitUneremarhahlyhlunt. Branched 

 fertile st. with larger sheaths and whorls of about 6 branches ; 

 simple fertile st. short (4 — 6 in.), vidth many loose and still 

 larger yellowish-white sheaths with black prominent ribs up- 

 wards and 12—20 teeth.— Wet places, rai-e. P. IV. E. S. I. 



3. E.7nax'imum (hsxQ..); sterile st. nearly smooth with about 

 SO striae and branches, branches rough doubly angular simple, 

 teeth of sheaths ^-ribbed, fertile st. simple with many crowded 

 large deeply-toothed sheaths. — E. Telmateja, H. F. 58. 8. 3. 

 N. 67. E. fluviatUe 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 80 — 40 teeth : spike large. — Wet places. 

 P. IV. E. S. I. 



** Sterile and fertile st. subsimilar, contemporaneovs, branclied. 



4. E. sylvat'icum (L.) ; sterile and fertile st. vsdth about 12 

 furrows and many whorls of slender compound spreading or 

 defle.red solid branches, sheath lax ending in 3 or 4 blunt lobes. 

 —E. B. 1874. H. F. 61. 8. 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 

 outUne of sterile st. pyramidal, of fertUe abrupt. — Wet shady 

 places. P.IV. V. E.S.I. 



*** Stems of one kind, with or vnthout simple hollow whorled 

 branches. 



6. E. limdsum (L.); stem nearly smooth with many slight 



