143 

 SOME MOULDS FROM PENNSYLVANIA 



By David R. Sumstine 



. In the study of the moulds of North America, the following 

 species have been observed in Pennsylvania. An enumeration 

 of these species may interest mycologists. 



Fischer* divides the Mucorinae (Mucorales) into four families, 

 Mucoraceae, Mortierellaceae, Chaetocladiaceae, and Cephalida- 

 ceae. No species of the second family have yet been found in 

 our state. 



Mucoraceae 



Miicor niucedo Linnaeus 



This species is widely distributed on horse manure and can 

 readily be cultivated on a decoction of horse manure, on potato, 

 and on bread. It is seldom found on fruits. 



Miicor raceinosiis Fresenius 



Found on boiled potatoes, on bread, and on horse manure. It 

 can be cultivated on bread and on potato. 



Mucor piriforviis Fischer 



The specimens referred to this species agree fairly well with 

 the description of Fischer \ except the size of the columella and 

 of the spores. In my specimens the columella is pear-shaped 

 1 17-150//. high and 50-117/-! wide at the broadest part. The 

 spores are broadly elliptical, 13-16/^ long and 10-13 /7- wide. 

 The spores germinate in the mineral liquid used by Van Tieghem 

 and Le Monnier. % A number of attempts to germinate them in 

 water proved a failure. 



The plants grew on the dung of deer, were cultivated on bread, 

 on boiled potato, and on cornmeal. 



Phyco-myces nit ens (Agardh) Kunze 



Usually found on oily substances and may be cultivated on 

 ground flaxseed and on cornmeal. 



* Fischer, Krypt. Flor. v. Deutschland, etc., 175-177- 1872. 



t Fischer, loc. cil., 191. 



■+Van Tieghem et Le Monnier, Ann. .Sc. Nat. V. Ser. T. 17 : 267. 1873. 



