Pound: REVISION OF MUCORACEAE. 



91 



cardo, on the other hand, in vohime 10 of the Sylloge Fungorum 

 takes exception to Dr. Kuntze's changes in the nomenclature 

 of the fungi, and leaves his position somewhat in doubt. There 

 seems to be no reason, however, why the Rochester rules, as 

 amended, should not be applied to the fungi, and I have 

 endeavored to adhere to them here. 



Systematic. Family MUCORACEAE. "Mycelium well 

 developed, thread-like (i. e. with hyphae), branched, up to the 

 time of fructification unicellular (i. e. without septa). Asexual 

 reproduction by internal spore formation in terminal cells 

 (sporangia) or by reduced sporangia which resemble one celled 

 conidia or conidia chains. Sexual reproduction by zygospores, 

 that is by the union of two undifferentiated, or scarcely differ- 

 entiated cells to form a zygospore. All spores germinating by 

 a germinating tube; no swarm spore formation." (Schroeter) 



Synopsis. 



Asexual spores formed in sporangia. 

 Sporangia with a columella. 

 Mycelium and sporangia of one kind only. 



Sporangiopliores simple or branched, but not 

 dichdtomous. 

 Sporangiophores unbranched, bright me- 

 talic in color. 

 Vegetative mycelium colorless, aerial brown 



and thorny (approaches Rhizopeae). 

 Sporangiophores dichotomously branched. 

 Mycelium of two kinds,— vegetative and fertile. 

 Sporangiophores borne at the nodes of the 



stolons. Zygospores naked. 

 Sporangiophores borne on the tips of the arched 

 internodes. Zygospores covered by 

 outgrowths of the suspensors. 

 Sporangiaof two kinds, — principal sporangia and 

 sporangiola. 

 Principal sporangia with a columella, spor- 

 angiola without a columella. 

 Principal and secondary sporangia with a col- 

 umella. 

 Membrane of sporangium of two parts, above 

 cuticularized and permanent, below 

 thin and quickly disappearing. 

 Sporangiophores evenly cylindrical, sporangia 



not thrown otf at maturity. 

 Sporangiophores swollen below the sporangia; 

 sporangia thrown off at maturity. 

 Sporangia without a columella; fertile mycelium 

 distinct from the vegetative 



MUCOREAE. 



Eumucoreae. 



3Iucor. 



Phycomyces. 



Spinellus. 

 iSyzygites. 

 Rhizopeae. 



Ascophora, 



Absidia. 

 Thamnidleae. 

 Thamnidium. 

 Dicranophora. 



Piloboleae. 



Pilaira. 



Hydrogera. 



MOKTIERELLEAE. 



