174 .MEDICINAL AND POISONOUS PLANTS 



Fig. 166. — Club-moss {Lyropodium clavatum, 

 Club-moss Family, Lycopodiaceoc). 1, 

 plant in "fruit." 2, spore-case, with the 

 scale-like leaf which bears it. 5, spores, 

 highly magnified. (Wossidlo.) — A creep- 

 ing evergreen with somewhat moss-like 

 leaves, and .stem attaining a length of 

 1 m. or more; spore-bearing cones yel- 

 lowish; spores sulphur-yellow. Native 

 home. Northern America and Eurasia. 



Fig. 167. — -Sweet-flag (Acorns Calamus, Arum Family, Aracece). A, plant 

 in flower, much reduced. B, flower-cluster, natural size. C, flower, 

 with perianth spread, t. D, floral diagram. E, ovary, cut vertically, V, 

 F, ovule, much enlarged. (Luerssen.) — Perennial herb about (iO cm. 

 tall; flowers greenish; fruit fleshy, reddish. Native to North America 

 and Europe. 



