428 



EQTJISEIACE^. 



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

 —S. 2. N. 63. E. Drummondii Hook., E. B. S. 2777.— Sterile 

 St. 1 — Ij ft. high, nearly naked below; with many whorls of 

 slender branches in the upper part, having 3- or 4-toothed 

 sheaths, their lowest joint and sheath falling short of the st.- 

 saeath ; general outline remarkahly hlunt at the top. Branched 

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

 simple fertile st. short (4 — 6 in.), with many loose; and stUl 

 larger yellowish-white sheaths with black prominent ribs up- 

 wards and 12—20 teeth. —Wet places, rare. P. IV. E. S. 1. 



3. E. max'imum (Lam.) ; .sterile st. nearly smooth with about 

 SO strise and branches, branches rough doubly angular simple, 

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

 large deeply toothed sheaths. — Bull. Soc. Bot. de Fr. viii. 637. 

 E. Telmateia Ehrh. , «. 3. N. 67. E. fluviatile S,m.,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 with a longitudinal ftirrow 

 and 4-toothed sheaths, their lowest joint and sheath exceeding 

 the St. -sheath'. Fertile st. stout, 1 foot or more in height, with 

 many very long pale-brOwn sheaths with 30 — 40 teeth; spike 

 large".— Wet places. P. IV. E. S. I. 



** Sterile and fertile stems similar, cOntemporaneov^, branched. 



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

 furrows and many whorls of slender compound spreading or 

 deflexed solid branches, sheaths lax ending in 3 or 4 blunt lobes. 

 —E. B. 1874. A 4. N. 59.— St. 12—18 in. high. Sheaths of 

 the branches with 3 Ibng acute teeth each 1-ribbed to its tip. 

 Fertile st. occasionally simple. Spike blunt. General outline 

 of sterile st. pyramidal, of fertile abrupt. — Wet shadjf places. 

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



'* * Stems of one kind, with or withcnit simple hollow whorled 

 branches. 



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

 fuiTows, teeth of sheaths short rigid acute, branches simple 

 whorled or none. — St. 2 — 4 ft. high. Sheaths rather short. 

 Spike blunt.—*. E. Kmosum (L.) ; st. smooth, barren st. nar- 

 rowing gradually upwards, branches short rigid slightly tapering 

 upright and equalling the, joints of the st. from green sheaths 

 often wanting. — ^. E.Jhiviatile (L.) ; 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. \ll. E. S. L 



6. E. palus'tre (L.) ; st. toith 4—8 deep furrows branched 



