THE THELEPHORACEAE OF NORTH AMERICA УІ 
Hypocunvus 
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. Мус. 3:23. 1881; 
Finska Vetenskaps-Soc. Bidrag Natur och Folk 37:162. 
1882; Finl. Basidsv. 438. 1889; Fries, Obs. Mye. 2:278. 1818 
and 1824, (in part); Syst. Мус. 3:289. 1829, (in part); Gen. 
Hym. 16. 1836, (in part); Еріст. 569. 1838, (in part); Басс. 
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, Krypt.-Fl. Sehlesien 3:419. 1888; Engl. & Prantl, 
Nat. Pflanzenfam. (I:1**) :117. 1898. — T'omentellina v. Höh- 
nel E Litschauer, K. Akad. Wiss. Wien Sitzungsber. 115: 
1604. 1906. 
Fruetifieations 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 аве in the works cited above, — Tomen- 
tella to Гене. because ће used this word in pu а in the names of two 
рү in his pu ublished peres] Obs. Mye. 2:18 and 19, 1799, as Elton: 
*97. Corticium (Tomentella) f errugineum. 
**98. Corticium ( Tomentella) chalibeum.’ 
s not generic ғана of Tomentella. Why Persoon used the 
word is not evident; he A not adopt it as a genus in his following formal 
works: ` Syno s Fungorum’ published in 1801, and ‘Mycologia 
' jn 1822. Erbe y publiestion of Tomentella was not made until 1887 
by Patouillard six years after Karsten's emendation of Hypochnus; hence 
€ a 
fo, Вот. GARD., Vor. 3, 1916 (203) 
