XIII. FUNGI 



957 



TrufiQe. Transverse section. 



Truffle {Tuber melanospoi^m). 





'M^ 



Ascoboltis pulclierrimus. 



Isolated tliecse containing 



eight spores. 



Ascobolus pulc7ie?'rimus. 

 Vertical section, showing the tissue and the sporangia (thecie). 



Truffle. 

 Fragment showing the 

 sporangia. (Tulasne.) 



Truffle. 



Sporangium (theca) with 



two spores. 



Ascobolus, Theca 



opening at the top 



and accompanied by 



a paraphysis. 



(WoroniD.) 



Sphteiia ophioglossoidea. 



Morel. 

 (Morchflla esculenta.) 



The Ectothecal Thecasporeee approach Lichees in the organization of their opercukte reproductive organs 

 (thects), associated with paraphyses. Mitrula palvdosa is a small orange FuBguSj of which the habitat is curious 

 and exceptional ; it grows at the bottom of watery swamps, fixed to leaves and small twigs. The common 

 Morel {Morchella esculmtd)m&y belookedon as the harbinger of spring, appearing [in France] with tolerable 

 regularity in April, if this month is rainy. It is eaten fresh or dried, as are all its congeners. It is the 

 same with Helmll<s, though one species of this genus has been noted by Krombholz as suspicious j it is 

 H. smpecta, which he refers to a plant discovered at Fontainebleau by Paulet^ and described under the 



