Fig. 58. Equisetum ramosissimum Desf. 1. Plant from Natal. 2. Spike, r. Annulus. 

 3. A sporophyll. 4. The same seen from below. 5. Spore. 6. E. palustre L. 

 Part of a J 1 gametophyte. a, h, c, d, stages of development of the antheridia. 

 sp. Spermatozoids. 7. E. arvense L. Female gametophyte. pr. Sterile lobes. 

 rh. Rhizoids. ar. Archegonia. (1-5 from nature, 6, 7 from Engler and Prantl) 



