340 



BOTANY: PRINCIPLES AND PROBLEMS 



Fig. 214 — Equisctum anemc A pHnt producing from its undergiound 

 rootstock several fertile stems (A), teiminating in cones (1), and a sterile, much- 

 branched shoot B. C, one of the sporophylls from the cone, bearing a group of 

 sporangia. D, the same, with the sporangia ruptured and their spores shed. 

 E, F, and G, spores, greatly enlarged, with the elaters in various positions. 

 (From Strasburger, after Wossidlo). 



