196 



Mycologia 



mixed, and since we sectioned different aecia from those studied 

 by Arthur and Kern, we may have examined a different species. 

 The following species of Peridermium are now known to occur 

 on Finns echinoAa, viz. : P. acicolum, P. carneum, P. delicatulum, 

 P. elephant opodis, P. inconspiemtm, P. ipomeae, and P. terebin- 

 thinaceae, and the occurrence of more than one of these species 

 on the same tree has often been noted by the senior writer. 



Data on the Period of Fruiting in Foliicolous Species of 

 Peridermium on Pine 



The period for fruiting among foliicolous species of Peri- 

 dermium on pine based upon the results of a large number of 

 observations and experiments in infections is as follows : Infec- 

 tions take place as soon as the telia are mature on the alternate 

 host. This begins much earlier in Florida than farther north, 

 since the aecia and telia both mature at least two months earlier 

 in Florida than at Washington, D. C, and three months earlier 

 than in the mountains of Pennsylvania and in regions farther 

 north. Aecia are mature in Florida from February to April, and 

 telia from the middle of May to July or even later, varying with 

 the species. Around Washington, D. C, aecia are found from 

 April to June and telia from July to September or later. Inocu- 

 lations with telia made at Washington, D. C, in September and 

 October produce mature pyenia in two or three months and ma- 

 ture aecia on the same areas adj.acent to the pyenia four to five 

 months after infection. As a rule, a second crop of either pyenia 

 or aecia is not produced in artificial infections, but four instances 

 of deferred fruiting, one with Peridermium acicolum, and three 

 with Peridermium carneum have been noted, in which pyenia and 

 aecia were formed the second year following the time of inocula- 

 tion. In Florida, however, the senior writer has frequently ob- 

 served both Peridermium carneum and P. ipomoeae on Pinus 

 palustris, bearing a second crop of aecia on the margins of old 

 infections which had borne aecia the previous year. 



New Hosts for Species of Coleosporium 



The following aecial hosts for species of Coleosporium are 

 reported in this paper for the first time on species of Pinus: 



