SELAGINELLA . 165 



(g) Draw a section of the stem (X 20), to illustrate 



2, (a)-(e). 

 E. Asexual Reproduction: 



1. Vegetative Propagation. 



(a) Describe any means of vegetative propagation 



disclosed by your observations, already made. 



(b) If opportunity offers, the vegetative propaga- 

 tion of Selaginella may be experimentally 

 demonstrated in the greenhouse or Wardian 

 case. 



2. Reproduction by Spores. 



(a) Observe the "cones." How are they dis- 

 tinguished? Are they terminal on the main 

 branches, or axillary? 



(b) Draw (X 5). 



(c) Place a small portion of a branch, bearing several 

 mature cones, under a glass bell- jar, and after 

 twenty-four to forty-eight hours observe the 

 distance to which the spores have been projected. 

 Note the two kinds, their relative number, and 

 differences in color, etc. 



(d) Carefully remove sporophylls (i) from near the 

 base of the cone; (2) from the middle or above, 

 and mount in water or clearing fluid, keeping 

 distinct, on separate slides, those from the two 

 regions. 



(e) Note both megasporophylls, bearing mega- 

 sporangia, and microsporophylls bearing micro- 

 sporangia. How are they distinguished? 



(/") Are the sporangia inserted on the leaf, or on 

 the stem in the axil of the leaf? Compare with 

 the other plants studied in this respect. 



(g) Describe the structure of the walls of the 

 sporangia. 



