942 



XII. LICHENES. 



Col/ema Jacolta/ulium. 

 Sporangia and paraphysis (mag.). 



Collema Jacoktfolium. 



ClaJunia verttcillarit. 



I'm nulia liliacea. 



l'ai iiu'Ua tiliacea. Vertical section 

 of an apotbocium (mag.)- 



Graphit eltgant. 



CoUema Jacolxtfolium. 



Vertical section of a spermogonium, from which 

 the spermatia are escaping (mag.). (Tulasne.) 



Parmelia. Portion of thallus 

 bearing an apothecium (mag.). 



