598 



CXIII. EQUISETACE-^. 



pZd trnct? ^' " "' "" distinguished by the simple, not com- 



3 E ar™<? L. {Corn H.)- frond attemiated upwards 

 sterile stem slightly scabrous with 12—14 furrows, teeth of 

 the sheath lanceolate-subulate 1 -ribbed to the point, branches 

 simple erecto-patent, fertile stem without branches, its sheaths 

 remote loose. E. B. t. 2020. 



Corn-fields and road-sides, frequent. 

 sterile stems appear. 



Fr. April ; afterwards the 



»* 



Fertile stems similar to the sterile ones, simple or hrancJied. 



4. E.sylvdticum L. (branched Wood H.) ; sterile and fertile 

 stems with about 12 furrows, branches compound whorled de- 

 flexed, sheaths lax with about 6 or 12 long membranaceous 

 obtuse teeth, catkin terminal obtuse. JE. B. t. 1874. 



Moist woods, hedge-banks; abundant in the north. Fr. April, 



r^u~.-^ graceful species, less rigid and more herbaceous than any 



of the following. Stems annual. Sterile plants pyramidal in their 



outline ; fertile ones abrupt at the top, especially after the fructifica- 

 tion has passed away. 



5. E. limosum L. (smooth nalied H.) ; stems nearly smooth 

 striate, strue about 16—18, teeth of the sheaths short ri<via 

 distinct, branches nearly erect simple whorled often abortive 

 catkin terminal upon the stem. E. B. t. 929. — «. stems quite 

 smooth, branches short and rigid nearly equal throu'rhout 

 as long as the mternodes, spike nearly sessile. E. limo- 

 suni Fries; Baker in Phytol. 4., p. 1056.-/3. stem somewhat 

 scabrous above, branches long and slender tapering to the point, 

 lon-er than the internodes, spike stalked. E. fluviatile Linn. ? 

 lories ; Baker, 1. c, p. 1056. (not of Brit. Fl.) 



Marshy watery places and ditches, frequent. Fr. June J.ilv _ 



Stems annual. Next in size to our E. fluviatile, but very differ'ent ; 



It has fewer angles and teeth and fewer branches in a whorl, and these 



latter are often short and imperfect, or wanting ; differing, too, by the 



cathins being upon stems that are similar to the barren ones. Mr. 



Baker, in 1 hytol. 4., p. 1118., describes and figures a double row of 



tubes in the substance of the tubes of the stems in var. «. ; one row 

 in p. 



■ ^' ^i ^f''f' h ^^"'''^ ^-^ ' ^*«™s deeply furrowed round- 

 ht At ''"isles, teeth of the sheaths Vedge-shaped acute 

 brown a the point and membranaceous at the margin, branches 

 simple wliorled gradually shorter upwards (sometim^es abortive), 

 catkm termmal obtuse.-«. vulgare ; stem with 6-8 furrows 

 branches barren, catkin terminal on the stem. E. B. t. 2021 - 



SjS;;:^^^iS:f !^ J!!!^ '~t -^^-.-!i teeUr to the 



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