Pliotoiiiicrojiraj^hs of Botanical Studies. 



2'? 



25 — Entire Strobolie of " Selaginella Martensi." 



Micr(jsporangia (various stages of 



development.) 



MIerospores fully formed. 

 Macrosporangia. 



Fruiting branch with leaves. 



26.— L.S. Embryo of " Gossypium Sp." (Cotton plant). 



Cotyledons (First 

 leaves) folded 

 over the stem. 



Piimary axis, or 



stem. 



The hypocotyl 



Edges of Cotyledons 

 (leaves). 



Root. 



Cumpaye i^'itii 27 &^ 2S. 



