180 Journal of the Mitchell Society [February 



5. Stereum fasciatum (Schw.) Fr. 



Plate 22 



Plants very thin, tough and phable when fresh, rather brittle 

 when dry, sessile, and attached by a narrowed base, often imbri- 

 cated, individuals reaching a width of about 8 cm., the upper surface 

 covered densely with a rather harsh, fibrous tomentum; color light 

 creamy gray or grayish tan, with distinct, rather closely set zones. 

 After maturity the upper surface soon becomes green from the growth 

 there of the alga Pleurococcus. Hymenium smooth, faintly zoned 

 and of a hght fleshy-cream color. Spores (of No. 3815) smooth, 

 elliptic, 2.1-2.9 x 5.1-6.5[jl, just like those of S. lohatum. 



The plant is very common on logs and stumps and may occur 

 in such abundance as almost to cover a large log. It is not rarely 

 intermixed with Coriolus versicolor. The caps are only about a quar- 

 ter to a half mm. thick. The plant is easily recognized by the strigose- 

 hairy cap, hght hymenium and comparatively large size. It is often 

 referred in American herbaria to *S. hirsutum. 



938. On an old rotting log by Fern Walk, September 14, 1913. 

 3815. On dead, deciduous twigs and bark, December 3, 1919. 

 3820. On rotting oak, December 5, 1919. 



Common on trunks and limbs. Curtis. 



6. Stereum lobatum Kunze. 



Plates 22 and 35 



Plants about 1.3-5 cm. broad, sessile and attached by a narrowed 

 base, petal-shaped and often fused laterally, surface conspicuously 

 zonate with varying shades of light tan, cream, deep reddish brown, 

 cinnamon, etc. Most of the surface is covered with a thick, close 

 interwoven tomentum of satiny texture, but narrow zones on or 

 near the margin may be free from it. Texture pliable when fresh, 

 less pliable and rather brittle when dry, very thin. Hymenium 

 smooth, faintly zoned; color a light fleshy salmon or fleshy tan. 



Spores (of No. 3816) smooth, white, elliptic, 2.2-3 X 5-6. 5[x, 

 like those of S. fasciatum. 



This species is about as common as S. fasciatum which it resembles 

 closely in shape, colors and texture. It averages smaller than that 

 species and may be distinguished best by the interw^oven, feltish 



