1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 229 



38. C. spretum Burt, n. sp. 

 Type: in Burt Herb. 



Fructifications effused, adnate, rather thick, somewhat cori- 

 aceous, cinnamon-buff in the herbarium, even, not shining, in 

 drying cracking to the substratum into polygonal masses about 

 1 mm. in diameter, the margin similar, narrow, entire; in section 

 200-300 \l thick, colored like the hymenium, composed of as- 

 cending, densely interwoven, thin-walled hyphae 3-33/2 V- in 

 diameter, not incrusted, not nodose-septate; no gloeocystidia; 

 slender paraphyses about 1 [i in diameter, with short branches 

 near the tips, are present between the basidia; spores hyaline, 

 even, 8-10 X 5-6 \l. 



Fructifications probably large, for received in fragments up to 

 5 cm. long, 2 cm. wide. 



On decorticated wood of a decaying stump of Fraxinus oregona. 

 Washington. September. 



C. spretum has conspicuous fructifications resembling Hymeno- 

 chaete spreta in aspect. The deeply cracked fructifications cin- 

 namon-buff externally and throughout, large spores, slender 

 paraphyses, and occurrence on ash stumps should enable the 

 species to be recognized confidently. 



Specimens examined : 

 Washington: Bingen, W. N. Suksdorf, 962, type. 



39. C. rubropallens (Schw.) Massee, Linn. Soc. Bot. Jour. 27: 

 145. 1890. 



Thelephora rubropallens Schweinitz, Am. Phil. Soc. Trans. N. S. 

 4: 168. 1832. Stereum rubropallens (Schw.) Cooke, Grevillea 

 20: 35. 1891; Sacc. Syll. Fung. 11: 121. 1895. Not C. rubro- 

 pallens Bresadola, Ann. Myc. 1 : 97. 1903, nor Bourdot & Gal- 

 zin, Soc. Myc. Fr. Bui. 27: 258. 1911. 



Type: in Schweinitz Herb, and probably in Farlow Herb, and 

 Kew Herb. 



"T. effusa, indeterminatim effigurata, ambitu marginibus latis- 

 simis albis; versus centrum subroseo-incarnata, crebre sporidifera 

 aut pulverulenta. Pelliculam efficit ex arete intertextis filis. 

 Ulnarem longitudinem explet. 



"Longe lateque effusa in corticibus et lignis Bethlehem.' ' 



Schweinitz. 



