72 The North American Cup-Fungi 



subcylindric above, reaching a length of 250-300 m and a diameter 

 of 14-16 M or rarely 18 m; spores 1-seriate, at first smooth, be- 

 coming sculptured, reaching a diameter of 15-18 m, becoming 

 pale-yellow or smoky; spore-sculpturing taking the form of 

 minute warts or short, interrupted ridges; paraphyses about 

 3-4 M in diameter below, sparingly branched, enlarged at their 

 apices where they reach a diameter of 8 ju, adhering together, 

 yellowish-brown. 



On burnt ground and charcoal beds. 



Type locality: Ascot Heath, Great Britain. 



Distribution: New Hampshire to Colorado; also in Europe. 



Illustrations: Boud. Ic. Myc. pi. 306; Bull. Lab. Nat. 

 Hist. State Univ. Iowa 6: pi. 14, f. 1; Cooke, Mycographia pi. 67, 

 f. 257; Trans. Linn. Soc. 24: pi. 51, f. 3, 5; Mycologia 6: pi. 114, 



J. 10. 



One of the larger species of the genus and rather commonly 



collected on burnt places. 



24. Lamprospora Detonia Brenckle, Mycologia 8: 318. 1916. 

 Apothecia scattered, scutellate, with the margins elevated, 



slightly incurved and free from the substratum, externally brown 

 and verrucose, quite regular in form, becoming convolute in 

 drying, reaching a diameter of 5-12 mm.; hymenium smooth, 

 concave to plane, dark-brown to black with a green tint; asci 

 cylindric or subcylindric, reaching a length of 300 m and a 

 diameter of 15m; spores 1-seriate, crowded in the upper third 

 of the ascus, at first smooth, becoming sculptured, containing one 

 large oil-drop, becoming brown and opaque so as to appear black 

 under the microscope, reaching a diameter of 12-15 m; spore- 

 sculpturing consisting of minute warts or pits which are much 

 finer than those of L. trachycarpa; paraphyses slender, yellowish, 

 the apex thickened and colored. 



Among mosses on shaded ground in woods. 



Type locality : Cheyenne River near Anselm, North Dakota. 



Distribution : Known only from the type locality. 



25. Lamprospora nigrans (Morgan) Seaver,Mycologia6: 20. 1914. 



Peziza nigrans Morgan, Jour. Cinn. Soc. Nat. Hist. 18: 43. 1895. 

 Detonia nigra?is Sacc. & Sydow in Sacc. Syll. Fung. 14: 747. 1899. 



Apothecia at first roundish, expanding and becoming cup- 

 shaped, finally scutellate and often more or less irregular, ex- 



