1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 333 



like the hymenium, not incrusted, not nodose-septate; probasidia 

 spherical, 6 (j. in diameter; spore-bearing organs numerous, 

 cylindric, 30 X6(i; spores simple, hyaline, curved, 13 x 3J/ p.. 



Fructifications probably large, for the one seen covered an 

 area IY2 cm. long, 5 cm. wide. 



On moss-covered bark of an apparently frondose species. 

 Chile. December. 



Distinguished by bright Brussels brown color, stratose structure 

 consisting of 2 strata in the type, and absence of supporting 

 pillars for the hymenial crust. The hyphae arise uniformly into 

 the fructification from all points in the substratum. 



Specimens examined : 

 Chile: Corral, R. Thaxter, 6, type (in Farlow Herb., and Mo. Bot. 



Gard. Herb., 57896). 



S. spiniferum Burt, n. sp. 



Type: in Farlow Herb, and Mo. Bot. Gard. Herb. 



Fructifications resupinate, effused, adnate, coriaceous, blackish 

 brown (3) in the herbarium, not shining, surface somewhat 

 veined and with the veins extended into occasional, cylindric 

 teeth or spines 2-5 mm. long, 2/5 mm. in diameter, extending 

 obliquely from the veins and the hymenial surface in the marginal 

 region, the margin fimbriate; in section 400 \l thick, colored, 

 composed of loosely interwoven, rigid hyphae 4}^ n in diameter, 

 concolorous with the fructification; probasidia 9-12 ja in di- 

 ameter; no spores nor spore-bearing organs seen. 



Fructification 9 cm. long, surrounding a living hardwood 

 branch 12 mm. in diameter. 



On living, frondose branches. Chile. November. 



The veined hymenium of S. spiniferum locates this species in 

 the group with S. retiforme. The extension of the veins in the 

 form of large h'ydnoid teeth is a unique character, if constantly 

 present in future collections. 



Specimens examined: 

 Chile: San Pedro, Concepcion, R. Thaxter, o, type (in Farlow 



Herb., and Mo. Bot. Gard. Herb., 57895). 



