[Vol. 3 

 222 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



the hyphae, siibglobose-angiilar, 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, AViscon- 

 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. 



Corticiut)i isahelliniim (in section Hypochnus) 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/x, 

 rarely SOO^t, thick, with a few hy- 

 phae 8-10/x, 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. ing at right angles, thick-walled. 



Spore, hyphax 640. not nodose-septatc ; basidia with 4 



sterigmata ; spores concolorous, globose, echinulate, the spore 

 body 7-9/i. in diameter. 



Fructification 5-10 cm. long, 1^-3 cm. broad, and probably 

 larger. 



