416 98. EQUISETACE^. 



6. E. palustre (L.) ; st. with 4 — 8 deep furrows branched 

 throughout, sheaths loose pale with acute wedgeshaped teeth 

 tipped with brown and membranous at the edges. — E. B. 202] . 

 S. 6. iV. 43, 47 and 49. — St. slightly rough. Barren st. whip- 

 shaped at the end. Spike blunt. Sheaths coloured like the st. 

 or paler; teeth brown with nearly transparent edges, rib fur- 

 rowed on the back. Branches iisually barren or (/3. polystachion) 

 each ending in a catkin. Occasionally (y. nudum DC.) the angles 

 and teeth are fewer and the st. nearly or quite simple and dwarf. 

 . — Spongy bogs. y. Sandy places. P. VI. VII. 



7. E. hyemale (L.); st. simple very rough with 14 — 20 slender 

 furrows, sheaths close whitish but the top and bottom black, teeth 

 slender black deciduous.— E. B. 915. S.8. iV. 17.— St. 1—2 ft. 

 high, simple, biennial. Spike with an apiculus. Sheaths widest at 

 their top, at first green with a black crenate rim after the teeth 

 have fallen, then entirely black, and ultimately pale in the middle 

 and black above and below.— Damp banks and woods. P. VII. 

 VIII. 



8.? E. Moorei (Newm.) ; st. simple "annual" very rough 

 with about 12 furrows, sheaths " loose " white with the base 

 black, teeth black-based rather persistent. — Phytol. v. 19. 

 S. 12. — St. 1 — 2 ft. high, never branched. Spike with an api- 

 culus. Sheaths loose, pearly white ; teeth long, whitish above, 

 more persistent and longer than those of E. hyemale. — Probably 

 not distinct from E. trachyodon, from which the annual st. and 

 loose sheaths alone seem to separate it.— Wicklow. P. VIII. I. 



9. E. trachyodon (A. Br.); st. simple or very slightly branched 

 very rough with 8 — 12 furrows, sheaths close ultimately wholly 

 black, teeth slender persistent. — E.2Iuckaii N.24. S.9. — St. 

 1 — 3 feet high, simple or with solitary distant branches, biennial. 

 Spike with an apiculus. Sheaths quite cylindrical, pale green 

 with a black band beneath the teeth but ultimately wholly black. 

 Teeth more persistent than in the two preceding, usually black. 

 Certainly the plant of A. Braun. — Mountain glens. P. VII. VIII. 



10. E. variegatum (Weber and Mohr) ; st. simple or slightly 

 branched very rough with 4 — 10 furrows, sheaths slightly en- 

 larged upwards green below black above, teeth blunt each tipped 

 with a deciduous bristle. — N. 31. — St. about a foot high, erect, 

 usually simple except at the base. Lower half of the sheaths 

 green like the stem, upper part black ; teeth persistent ovate, 

 black in the centre, with >i white membranous margin. Spike 

 apiculate. — /3. arenarium; st. procumbent, usually more slender, 

 teeth of the sheaths wedgeshaped. E. variegatum Sm., E. B. 

 1987. S. 11. E. Wilsoni (Newm. 39. S. 10.) is probably a large 

 form of this variety. — Wet places, or in water. ^, Sandy places 

 near the sea. P. VII. VIII, 



