XIII. FUNGI 



957 



Truffle. Transverse section. 



Truffle (Tuber melano.tporum). 



Ascobolns pulcherrimus. 



Isolated tliecce containing 



eight spores. 



Ascobolus pulcfierrimvt. 

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



Truffle. 



Fragment showing the 

 sporangia. (Tulasne.) 



Truffle. 



Sporangium (theca) with 

 two spores. 



Ascololus. Theca 



opening at the top 



and accompanied by 



a paraphysis. 



(Woronin.) 



Sphceria ophioglossoides. 



Morel. 

 (iforchfila esculenta.) 



The Ectothecal Thecasporea; approach Lichens in the organization of their operculate reproductive organs 

 (theca), associated with paraphyses. Mitrula pahtdosa isasmall orange Fungus, of which the habitat is curious 

 and exceptional 5 it grows at the bottom of watery swamps, fixed to leaves and small twigs. The common 

 Morel (Morchclla esculenta) may be looked on 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 Helvetia, though one species of this genus has been noted by Krombhotz as suspicious ; it is 

 H. suspecta, which he refers to a plant discovered at Fontaiuebleau by Paulet, and described under the 



