THE THELEPHORACEAE OF NORTH AMERICA VP 



Hypochnus 

 edward angus burt 



Mycologist and Librarian to the Missouri Botanical Garden. 



Associate Professor in the Henry Shaw School of Botany of 



Washington University 



HYPOCHNUS 



Hypochnus Fries emend. Karsten, Rev. Myc. 3^ :23. 1881 ; 

 Finska Vetenskaps-Soc. Bidrag Natur och Folk 37:162. 

 1882; Finl. Basidsv. 438. 1889; Fries, Obs. Myc. 2:278. 1818 

 and 1824, (in part) ; Syst. Myc. 3:289. 1829, (in part) ; Gen. 

 Hym. 16. 1836, (in part) ; Epicr. 569. 1838, (in part) ; Sacc. 

 Syll. Fung. 6:653. 1888, (in part) ; R. Fries, R. Sci. Soc. Goth- 

 oburgens Actis IV. 3 :37. 1900. Hypochnus as a subgenus 

 of Corticium Fries, Hym. Eur. 659. 1874, (in part). To- 

 mentella Persoon ex Patouillard,^ Hym. Eur. 154. 1887; 

 Schroeter,2 Krypt.-Fl. Schlesien 3:419. 1888; Engl. & Prantl, 

 Nat. Pflanzenfam. (1:1**) :117. 1S9S. Tomentellina v. Hoh- 

 nel & Litschauer, K. Akad. Wiss. Wien Sitzungsber. 115: 

 1604. 1906. 



Fructifications resupinate, effused, dry, coriaceous, felt- 

 like or hypochnoid, usually composed of loosely interwoven 

 hyphae which bear basidia sometimes in scattered clusters 

 but more usually in a compact hymenium; hymenium even 

 or papillose; basidia simple, bearing two or more spores, 

 rough-walled to echinulate, distinctly colored in most species, 

 pale-colored in a few, and hyaline in one or possibly more 

 species. 



^Issued September 30, 1916. 



^Patouillard and Schroeter, in the works cited above, attributed Tomen- 

 tella to Persoon, because he used this word in parenthesis in the names of two 

 species in his published note-book, Obs. Myc. 2:18 and 19, 1799, as follows: 



"27. Corticium (Tomentella) ferrugineum. 



"28. Corticium (Tomentella) chalibeum.*' 



This is not generic publication of Tomentella. Why Persoon used the 

 word is not evident; he did not adopt it as a genus in his following formal 

 taxonomic works: 'Synopsis Fungorum' published in 1801, and 'Mycologia 

 Europaea,' in 1822. Generic publication of Tomentella was not made until 1887 

 by Patouillard six years after Karsten's emendation of Hypochnus; hence 

 Tomentella is a synonym of Hypochnus. 

 Ann. Mo. Bot. Gard.. Vol. 3. 1916 (203) 



