REPORT OF THE STATE BOTANIST I9II 49 



Leptonia davisiana 



Pileus thin, submembranous, convex becoming plane or broadly 

 depressed, fragile, glabrous but slightly squamulose in the center, 

 often widely striate when dry, blackish brown ; lamellae thin, close, 

 subventricose, adnexed, at first white then pinkish and pulverulent 

 from the spores ; stem slender, equal, glabrous, stuffed or hollow, 

 colored like the pileus; spores angular, uninucleate, 10-12 x 8-10 [x. 



Pileus 1-2.5 cm broad; stem 1.5-3 cm long, 1-2 mm thick. 



Among short grass on a lawn. Brookline, Massachusetts. Aug- 

 ust. S. Davis, to whom the species is respectfully dedicated. 



It differs from Leptonia abnormis Pk. in its smaller size, 

 closer adnexed lamellae, squamulose disk and larger spores. The 

 lamellae are somewhat tough in the dried state. 



Leptostromella scirpina 



Perithecia epiphyllous or rarely amphigenous, suborbicular or 

 oblong, .20-.75 mm long, discoid or concave, subsuperficial, black; 

 spores subbacillary, hyaline, curved, continuous, acutely narrowed at 

 each end, 20-25 x 2-3 fx. 



On dead leaves of dark green bulrush, Scirpus atrovirens 

 Muhl. Superior, Nebraska. May. J. M. Bates. 



The perithecia sometimes occur on a pallid spot, occasionally on 

 both sides of the leaf. The species appears to be related to Lep- 

 tostromella hysterioides (Fr.) Sacc, but the spores are 

 neither guttulate nor cylindric. 



Lysurus borealis serotinus 



Specimens of this fungus in the egg state were collected in Salem. 

 Mass., and contributed in fresh condition by Mr W. H. Ropes in 

 October. These were placed in a damp chamber and two of them 

 burst from the egg and completed their development. At first the 

 arms, six in number, at the apex^of the stem are curved inward 

 their tips meeting at the center of the dome thus formed. In this 

 position the margins of the arms are rolled backward but the edges 

 are separated by a narrow white stripe, the central sterile exterior 

 of the arm. The contiguous margins of any two adjacent arms 

 are then in close contact and separated only by an inconspicuous 

 impressed line, and the exterior surface of the dome is covered by a 

 layer of the blackish or very dark olive green spores and the hymen- 

 ial surface is apparently external, although interrupted longi- 

 tudinally by the six white stripes. Anyone seeing the fungus in this 

 condition for the first time would be likely to refer the species to 



