STUDIES IN COLORADO FUNGI— I. 

 DISCOMYCETES 



Fred J. Seaver 



The present report is based on a collection of fungi made by 

 the writer and Professor Elsworth Bethel, during a part of last 

 August and September, in the Rocky Mountains in the vicinity of 

 Denver. The most of the collections were made about Tolland, 

 on the Moffat Road, at an elevation of 9,000 to 10,000 feet, at 

 Golden, in the foothills, at an elevation of 6,000 feet, and in 

 Geneva Creek Canyon, at elevations of 8,000 to nearly 14,000 feet. 



Of a collection of 900 specimens, about 250 were included in 

 the discomycetes. A critical study of these has revealed a num- 

 ber of points of interest, and, for this reason, a list of the species 

 determined is reported in the following paper, with comments on 

 those which are of especial interest. A number of species col- 

 lected I have been unable to determine, and these are held for 

 more critical study. Specimens of the species reported here are 

 deposited in the herbarium of the Garden. 



GEOGLOSSACEAE 

 Mitrula gracilis Karst. Hedwigia 22 : 17. 1883 

 Dr. E. J. Durand in his recent monograph of the North Amer- 

 ican Geoglossaceae (Ann. Myc. 6: 26. 1908) records this species 

 from Labrador and Newfoundland; he also states that the species 

 has been reported from Greenland. Our Colorado specimens 

 agree well in spore characters and habitat with the description 

 given by Dr. Durand. The plants occur attached to and appar- 

 ently parasitic on some species of bog moss in one of the gulches 

 of Geneva Creek Canyon, where they were collected in quantity. 

 Mitrula musicola P. Henn., which has been reported from Al- 

 berta, is said to differ only in the larger size and more convolute 

 hymenium. More than a hundred plants were collected in Colo- 

 rado and on the same host the fungus was found to vary much 

 in size ; young plants were found with a stem not over 2 mm. long 



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