912 



VI. LYCOPODIACE^. 



Pceppig has observed stems of Selaginella exaltata whicli measured more than 



60 feet. 



Leaves simple, "sessile, more or less decurrent, never jointed, regular or falcate, 



with a single stomatiferous nerve, sometimes whorled around the axis, and all, at a 



given height, of the same shape and size {Lycopodium, &e.); sometimes in 4 regular 



series, arranged on the 

 plan of the branches, and 

 presenting two different 

 forms; the one largest, 

 occupying the side of the 

 axis, and called lateral; 

 the others smaller, called 

 intermediate or stipuliform 

 ( Selaginella ) ; sometimes 

 auricled ; glabrous or very 

 rarely sub-pubescent, green 

 or dark or light red [Lyco- 

 f odium rulrum, ruhescens, 

 &c.), sometimes shot {8ela^ 

 ginella ccBsia, atro-viridis). 



Tmesipteris. 



Sporangium seen in front 



(mag.). 



PsUotam. rmctiferous 

 branch (mag.). 



Psilotum triqmtmm. 

 Fructiferous branch. 



Psilotum trigttetrum. 

 rructiferous pedicel. 



Tmesipteris. 

 Portion of fructiferous frond 



