260 



[Vol. 4 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 







o ^ 



Montana : Banner, J. R. Weir, 405 (in Mo. Bot. Gard, Herb., 



10582). 

 Idaho : Kaniksu National Forest, Priest River, J. R. Weir, 68. 



15. C. atrocinerea Karsten in de Thiimen, Myc. Univ. 1806. 

 1881 ; Soc. pro Fauna et Flora Fennica Meddel. 6 : 12. 1881 ; 

 Finska Vet.-Soc. Bidrag Natur och Folk 37 : 162. 1882; Sacc. 

 Syll. Fung. 6 : 650. 1888; Massee, Linn. Soc. Bot. Jour. 25 : 132. 

 1889. 

 Coniophorella atrocinerea Karsten, Finl. Basidsv. 438. 1889. 

 Type : type distribution in de Thiimen, Myc. Univ., 1806. 



Fructification effused, byssoid-membra- 

 naceous, adnate, drying sepia, the margin 

 somewhat mucedinous and paler, some- 

 times whitish; hymenium even; in struc- 

 ture 250-500 n thick, composed of loosely 

 interwoven, nearly black, rigid, even 

 hyphae 3%-5 /n in diameter, not nodose- 

 septate, not incrusted; cystidia incrusted, 

 septate, 9-15 fj, in diameter, emerging up 

 to 60 /i ; spores colored, even, 9-10x4%-6 /x. 

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

 becoming confluent in crevices of the bark 

 so as to form patches up to 8 cm. long. 



In crevices of bark of pine logs. Louisi- 

 ana. January. 



The Louisiana collection agrees closely 

 with the type distribution from Finland in 

 all respects except in having slightly broader spores, which 

 are 6 /* in diameter in the American specimen and usually 

 about 4% fjL in the type, although published by Karsten as 

 5-6 n. This species is very distinct by its firm, rigid, and 

 nearly black hyphae. It is strange that two specimens of 

 so similar and marked structure occur at such widely distant 

 localities without intermediate stations. 



Specimens examined: 

 Exsiccati: de Thiimen, Myc. Univ., 1806. 

 Finland: Mustiala, P. A. Karsten, type distribution, in de 

 Thiimen, Myc. Univ., 1806. 



Fig. 15 



C. atrocinerea. 



Protruded part of 

 cystidium, spores, 

 hypha. X 665. 



