[Vor. 3 
222 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
the hyphae, subglobose-angular, aculeate, the spore body 
7-9 ж би. 
Fructification 8 em. long, 2-3 em. broad — broken off at one 
On bark of decaying Quercus alba, Lake Geneva, Wiscon- 
sin, July. 
This fungus suggests Coniophora arida and C. puteana by 
its umber color and broadly effused fructifications, but it is a 
true Hypochnus, which is readily distinguished from other 
species of this genus by its color, hair-like cystidia, and 
the spores. 
Specimens examined: 
Wisconsin: Lake Geneva, E. T. € S. A. Harper, 877. 
12. H. isabellinus Fries, Obs. Myc. 2:281. pl. 6. f. 3. 1818 
and 1824; басе. Syll. Fung. 6:657. 1888; Bresadola, Ann. 
Mye. 1:106. 1903. 
Corticium isabellinum (in section Hypochnus) Fries, Hym. 
Eur. 660. 1874. — H. argillaceus Karsten, Soc. pro Fauna et 
Flora Fennica Meddel. 6:13, 1881; Sace. Syll. Fung. 6: 661. 
1888. 
Type: there is a specimen from Е. P. Fries in Curtis Herb. 
Fruetifieation effused, tomentose, thin, adnate, varying 
from deep olive-buff to dark olive-buff, the margin thinner, 
concolorous; in structure 60—200y, 
rarely 300и, thick, with a few hy- 
рһае 8-10и, or more, in diameter, 
ad P d running along the substratum and 
sending out suberect, loosely inter- 
woven branches; hyphae concolor- 
Fig. 12 ous with the fructification, branch- 
H. isabellinus. ing at right angles, thick-walled, 
Spore, hypha x640. not nodose-septate; basidia with 4 
sterigmata; spores concolorous, globose, echinulate, the spore 
body 7-9& in diameter. 
Fruetifieation 5-10 em. long, 144-3 em. broad, and probably 
larger. 
