XIII 



LYCOPODINE^ 



511 



characteristic feature of the forest vegetation of those regions. 

 A few belong to the more temperate parts of Europe and Amer- 

 ica, and a small number, e. g., S. rupestris, S. lepidophylla, 

 grow in dry situations. 



The Ganietophyte 



Hofmeister ( i ) included Selaginella among the other Pteri- 

 dophytes he studied, but he was unable to make out the earlier 



Pjq_ 295. A, B. C, Three views of the young antheridium of Selaginella Krausstana,. 



'x45o; D, an older stage of the same, X480; E, F, two views of an older an- 

 theridium of S. stolonifera, X480; G, spermatozoids of S. cuspidata, X1170; x, 

 vegetative prothallial cell; s, central cells (after Belajeff). 



Stages of development of the prothallium. Later Millardet ( i ) 

 and Pfeffer ( i ) made further investigations upon the same sub- 

 ject, and added much to Hofmeister's account, but were also 

 unable to determine the earliest phases of germination. 



Belajeff (i) has since given an accurate account of the 

 germination of the microspores, and during the past ten years 

 the development of the macrospores and female gametophyte 

 has been very thoroughly investigated. 



