Murrill : Dark-Spored Agarics 



267 



6. Atylospora umbonata (Peck) comb. nov. 

 Psathyra umbonata Peck, Ann. Rep. N. Y. State Mus. 50 : 106. 



1897. 



Pileus submembranaceous, campanulate, umbonate, gregarious 

 to cespitose, 2-5 cm. broad ; surface hygrophanous, purplish-brown 

 and striatulate when moist, grayish-white when dry, smooth or 

 slightly rugulose, atomate, the umbo commonly paler ; context con- 

 colorous ; lamellae rather broad, moderately crowded, ventricose, 

 subadnate, brownish-red, becoming purplish-brown and finally al- 

 most black, whitish on the edges ; spores ellipsoid, smooth, pur- 

 plish-brown under the microscope, blackish-brown to almost black 

 in mass, 12-15 x 7-8/x; stipe slender, flexuous, rigid-fragile, equal, 

 hollow, white to pallid, slightly mealy at the apex, 5-10 cm. long, 



2- 3 mm. thick. 



Type locality : Lake Pleasant, New York. 

 Habitat : On chip dirt. 



Distribution : New York, Michigan, Missouri, and Washing- 

 ton. 



Illustration : Kauffm. Agar. Mich. pi. 56. 



The type specimens, collected by Peck in July, are well pre- 

 served at Albany; and specimens sent to Peck from Missouri by 

 Glatfelter appear to match the types. Kauffman reports it as 

 rather frequent in Michigan and gives interesting notes as well as 

 figures of it. I found it at Seattle, Washington, in the autumn of 

 191 1 (628), growing in decaying trash in moist woods. This 

 species is probably too near Atylospora corrugis. See doubtful 

 species. 



7. Atylospora striatula sp. nov. 



Pileus thin, fragile, conic-campanulate to expanded, subumbo- 

 nate, sometimes with a small umbilicus, scattered, 2-4 cm. broad; 

 surface dry, glabrous, conspicuously long-striate, dull-bay to isabel- 

 line ; context thin, brownish, with mild taste ; lamellae adnexed, 

 crowded, plane or ventricose, rather narrow, white or isabelline to 

 purplish-brown; spores ellipsoid, smooth, pale-purplish-brown 

 under the microscope, purplish-brown in mass, about 7x4^; stipe 

 rigid-fragile, equal, smooth, shining-white, hollow, 5-7 cm. long, 



3- 5 mm. thick. 



Type locality : New York Botanical Garden, New York City. 

 Habitat : On humus in shaded places. 



