164 



Mycologia 



This is one of the most variable species in the family of fleshy, 

 terrestrial, tube-bearing fungi, but the small genus to which it 

 belongs is readily recognized by its red or reddish tube-mouths, 

 and all of its species should be avoided by mushroom eaters until 

 their properties are better known. This particular species is said 

 to contain a small amount of deadly poison, although it is often 

 eaten. When cut, the entire cut surface of the cap, tubes, and 

 stem changes at once to blue. It occurs often in abundance 

 throughout temperate North America and Europe on clay banks 

 or roadsides in open deciduous woods. 



Naucoria subvelosa sp. nov. 



Slightly-veiled Naucoria 



Plate 68. Figure 2. X i 



Pileus hemispheric and gibbous to nearly plane, usually slightly 

 umbilicate or depressed, gregarious, 1.5-2.5 cm. broad; surface 

 viscid when wet becoming dry and polished, slightly fibrillose- 

 scaly, especially at the center, the scales and fibrils being thin, 

 reddish-brown, and somewhat imbricate; margin entire or undu- 

 late, inflexed when young; context mild to the taste, without 

 odor ; lamellae strictly adnate, heterophyllous, arcuate or plane to 

 slightly ventricose, rather close, of medium width, dull isabelline- 

 umbrinous to dirty-brownish with a ferruginous tint ; spores ellip- 

 soid, smooth, ochraceous-melleous under the microscope, 8-9 

 X 5 />i ; stipe subequal, citrinous at the apex, isabelline below, 

 subglabrous, bearing the remains of a slight, fibrillose, fugacious 

 veil, cartilaginous to subfleshy, stuffed, averaging 3 cm. long 

 and 2 mm. thick. 



Type collected on a wet bank in woods in the Bronx, June 18, 

 1911, by W. A. Murrill. 



Collybidium dryophilum (Bull.) Murrill 

 Oak-loving Collybidium 



Plate 68. Figure 3. X i 



Pileus thin, convex, umbonate, becoming expanded and plane 

 to depressed with upturned edges, solitary, 3-4 cm. broad ; sur- 

 face glabrous, but with fine radiating lines like appressed hairs, 

 dry, uniformily light-brown ; context mild to the taste, without 



