[Vol. 12 

 324 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Alabama: Peters, in Ravenel, Fungi Car. 3: 34, and as Corticium 

 crocicreas Berk. & Curtis, type (in Kew Herb, and in Curtis 

 Herb., 4542). 



Kentucky: Mammoth Cave, C. G. Lloyd, 1601, 2661, and another 

 specimen comm. by Ellis Herb. 



Arkansas: Fordyce, C. J. Humphrey, 5799. 



93. P. sulphurina (Karst.) v. Hohnel & Litschauer, K. Akad. 

 Wiss. Wien Sitzungsber. 115: 1573. 1906. 



Tomentella sulphurina Karsten, Finska Vet.-Soc. Bidrag 

 Natur och Folk 48 : 420. 1889. — Hypochnus sulphurinus (Karst.) 

 Sacc. Syll. Fung. 9: 243. 1891. 



Type: authentic specimen — perhaps part of type — in Burt Herb. 



Fructifications effused, adnate, the hymenium drying clay 

 color, thin, brittle, even, here and there cracked and showing the 

 mustard-yellow subiculum, the margin fibrillose-byssoid, mus- 

 tard-yellow; in section 150-400 [jl thick, pale yellow, with the 

 hyphae loosely arranged, thin- walled, 4-6 \x in diameter, oc- 

 casionally nodose-septate, some hyphae granule-incrusted ; cys- 

 tidia hair-like, not incrusted, 3-6 \i. in diameter, protruding up to 

 30 \i., not numerous; spores hyaline, even, 3-4 X 2-23^ [jl. 



Fructifications 2-6 cm. long, 1-2 cm. broad. 



On coniferous bark usually. In Finland, from New Hampshire 

 to Alabama and westward to British Columbia and Oregon. 

 August to November. Rare. 



The American gatherings referred to P. sulphurina are a little 

 paler than the European and the sections lose most of their color 

 when floated on alcohol in sectioning so as to become not dis- 

 tinctly colored in section. In other respects our specimens agree 

 so well with the authentic specimen that I believe they should be 

 included in this species. Potassium hydrate solution does not 

 change the color of the sections to vinaceous and bleach them as it 

 does sections of P. filamentosa. 



Specimens examined: 

 Finland: Jalasjarvi, authentic specimen from P. A. Karsten. 

 New Hampshire: Chocorua, W. G. Farlow (in Mo. Bot. Card. 



Herb., 7872). 

 New York: Fall Creek, G. F. Atkinson, 7993; Ithaca, E. J. Petey, 



comm. by C. J. Humphrey, 471; Rainbow, C. H. Peck (in 



