1898.] PRAEGEK. — Fructificatio7i of Ferns, &'c. 119 



stems of intermediate character are not so rare. The fertile 

 stem is normally 6 to 12 inches high, stout, pale-brown, with 

 very large sheaths, and is mature when the barren stems are 

 only commencing growth. The barren stem is i to 6 feet 

 high, green, with numerous whorls of branches. The stems 

 of intermediate character which I have found were produced 

 a little later than the barren stems, and resembled small- 



•v^ >., 



#2 



^ig II. — Eqnisetuin vrnxinium. Found near -Dundonald, Co. Do\v"a, 



R. LI. P., 1896. 



sized barren stems with a terminal spike of fructification (see 



fig. 11), which, as in E. sylvatiaivi, was ripe while the branches 



