942 



XII. LICHENES. 



Collema Jacohwfollum. 

 Sporangia and paraphysis (mag.). 



Claionta verticUlaris. 



Parmdia iUiacea, 



Collemu Jacobae/olium. 



i^, 



Parmelia IUiacea. Vertical section 

 of an apothecium (mag.). 







Oraphis elegans. 



Collema Jacobi^oUml. 

 Vertical section of a spennogoninm, &2,™ ™™ 

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



Parrmlia. Portion of thallus 

 bearing an apothecium (mag.). 



