[Vol. 3 

 222 ANNALS OF THE MISSOUBI BOTANICAL GARDEN 



the hyphae, subglobose -angular, aculeate, the spore body 

 7-9 X 6/x. 



Fructification 8 cm. long, 2-3 cm. broad broken off at one 

 end. 



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. pi, 6. f. 3. 1818 

 and 1824; Sacc. Syll. Fung. 6:657. 1888; Bresadola, Ann. 

 Myc. 1:106. 1903. 



Corticium isahellinum (in section Eypochnus) Fries, Hym. 

 Eur. 660. 1874. H. argillaceus Karsten, Soc. pro Fauna et 

 Flora Fennica Meddel. 6:13. 1881; Sacc. Syll. Fung. 6: 661. 

 1888. 



Type : there is a specimen from E. P. Fries in Curtis Herb. 



Fructification effused, tomentose, thin, adnate, varying 



from deep olive-buff to dark olive-buff, the margin thinner, 



concolorous; in structure 60-200/*, 

 rarely 300/a, thick, with a few hy- 

 phae 8-lOfiy or more, in diameter, 

 running along the substratum and 

 sending out suberect, loosely inter- 

 woven branches; hyphae concolor- 

 Fiff. 12 ^^^ with, the fructification, branch- 



H. isabellinus. lug at right angles, thick-walled, 



Spore, hyphax640. not nodose-septate ; basidia with 4 



sterigmata; spores concolorous, globose, echinulate, the spore 

 body 7-9/A in diameter. 



Fructification 5-10 cm. long, l%-3 cm. broad, and probably 

 larger. 



