IOWA DISCOMYCETES \y] 



nose, .5 to 1.5 mm. in diameter with a short stem; asci clavate, 

 150 by 20 to 25/x, 8-spored ; spores elliptical, simple, 20 to 25 by 

 10 to 12^, 2-seriate with conspicuous oil drops; paraphyses 2[x 

 in diameter. 



On (dead?) branches of Crataegus sp. Mt. Pleasant. 



The plants from which this species was described were collect- 

 ed during the winter on branches of Crataegus near Mt. Pleasant, 

 where they occurred in abundance. 



According to Dr. Rehm the species is distinct from Dermatea 

 cratoegicola Durand in which the spores are 35 to 50 by 15 to 17/x. 

 There is also some difference in the color of the plants in the 

 two species. The asci appear to be filled with large, irregular 

 oil drope, which are so conspicuous that it is with difficulty that 

 the outline of the spores may be seen, but a faint outline can be 

 detected. The spores when removed from the asci are often seen 

 to contain 1 or more of these drops. 



TYMPANIS Tode, Fungi Meckl. 1 : 24. 1790. 



Plants erumpent, single or in dense clusters, at first globose, 

 closed, becoming expanded, for the most part with short, thick 

 stem; asci thick-walled, 8-spored, spores producing numerous 

 minute bodies which fill the ascus. 



One species collected in the state. 



Tympanis conspersa Fries, Syst. Myc. 2 : 175. 1822. 



Plants springing in minute dense clusters through the outer 

 bark of the host, at first globose, becoming expanded, black ; asci 

 clavate, thick-walled, filled with granular material ; spores not 

 well developed; paraphyses branched, enlarged upwards. 



On bark of Populus sp. Iowa City. 



Dead branches of the host were thickly covered with the plants 

 of this species which resemble those of the genus Dermatea exter- 

 nally. The asci are well developed but the spores are indistinct 

 or not well developed. 



SARCOSOMA Caspary; Rehm, Rabenh. Krypt. Fl l 3 : 497. 1896. 

 Plants globose to ovate or cylindrical, sessile or stipitate, ex- 



