94. EQUISETACE^E. 215 



5. E. LIMOSUM, L. Smooth Naked Horse-tail. Barren and 

 fertile stems nearly smooth. Stria3 1618. Sheaths with short, 

 rigid, distinct teeth. Branches often abortive or few, simple and 

 imperfect, confined to the upper portion of the stem. Spike 

 obtuse. 



Very common. In stagnant water and lakes. (B) P. 6 7. Fossil marsh; 

 Hogganfield loch, <fcc. 



6. E. PALUSTRE, L. Marsh Horse-tail. Stems 12 18 in. 

 high, slightly roughened, with 4 8 deep furrows. Sheaths 

 loose, pale, with acute wedge-shaped teeth, brown at the apex, 

 membranous on the edge. Branches few in a whorl, simple. 

 Spike terminal, obtuse. 



Frequent. In bogs and marshes. (B) P. 67. Paisley Canal bank; Frank- 

 field loch, &c. 



Var. polystachlon. Branches terminating in fertile spikes. 

 Hills above Gourock in stony marshes. 



7. E. HYEMALE, L. Rough Horse-tail, Dutch Rushes. Stems 

 1 2 ft. high, branched from the base, very rough, with 15 20 

 striae; sheaths close, black at the base and apex, white in the 

 middle, with bristle-pointed deciduous teeth. Spike terminal, with 

 a small point. 



Not common. Boggy places in woods. (S) P. 78. Kelvinside wood, by the 

 bank of a small rivulet; below Carmyle ; Kenmuir bank, near the marriage well. 



8. E. VARIEGATUM, Schl. Variegated Rough Horse-tail. 

 Stems 6 8 in. high, very slender, rough, naked, branched at 

 the base, with 4 10 furrows. Sheaths black above with white 

 teeth. 



Eare. On wet banks of lakes. (S) P. 78. ' Frankfield loch," Hopk. 



