IOWA DISCOMYCETES 77 



ALEUKIA Fuckel, Synib. Myc. 325. 1869. 



Receptacle cup-shaped, often irregular, externally pruinose, 

 usually bright-colored; asci cylindrical to clavate, 8-spored; 

 spores at first smooth, becoming rough and at maturity delicate- 

 ly reticulated. 



This genus was founded by Fuckel on Peziza aurantia Pers., a 

 reticulate-spored Peziza, and although not mentioned by Fuckel 

 this character has come to be recognized as the characteristic of 

 the genus or subgenus as the case may be. 



Two reticulate-spored forms occur in the state. 



KEY TO THE SPECIES. 



Plants small, about 1 cm., spores 1-guttulate. . . . A. aurantia. 

 Plants large, more than 2 cm., spores 2-guttulate. A. rutilans. 



Aleukia aurantia (Pers.) Fuckel, Symb. Myc. 325. 1869. 



Peziza aurantia Pers., Syn. Fung. 637. 1801. 

 Plate 17, f. I. 



Cups subsessile, at first regular, becoming irregular with age, 

 2 to 5 cm. in diameter, externally whitish; hymenium deep 

 orange; asci cylindrical, 8-spored; spores elliptical, 1-seriate, 2- 

 guttulate, at first smooth becoming reticulated, 15 to 17 by 8/x; 

 paraphyses slender, enlarged upwards, filled with orange gran- 

 ules which give color to the hymenium. 



In grassy places, Iowa City, also in woods. 



This is probably one of the most attractive and best known 

 forms of the discomycetes. Its large size and unusually bright 

 color makes it easy of detection. The species is probably rather 

 common throughout North America. A specimen was received 

 by the writer from Dr. T. C. Frye of Seattle, Washington, with 

 the statement that it occurred in abundance on the campus of 

 the State University. During the present season the same spe- 

 cies has been collected and studied by the writer in New York 

 City. These go to indicate a wide distribution. 



Aleukia rutilans (Fries.) Gill., Discom. 53. 1879. 

 Plate 17, f. II. 



Peziza rutilans Fries., Syst. Myc. 2: 68. 1822. 



