I'JIOJ 



BURT THELEPHORACEAE OF NORTH AMERICA. VII 343 



17. S. lilacinum Burt, n. sp. 



Type : in Farlow Herb, and Burt Herb. 



Fructification resupinate, effused, coriaceous, dry, adnate, 

 velutinous, between lilac-gray and pallid smoke-gray, the 

 margin adnate, fimbriate; in structure 

 80-2(X)/>t thick, with hypLae thin-walled, 

 2-2 %/i in diameter, somewhat colored 

 near the substratum, ascending and in- 

 terwoven and becoming hyaline towards 

 the hymenium, finer, 1%/* in diameter, 

 and bearing laterally probasidia, and 

 extending beyond the probasidia and Fig. 14 



branching, with tips curved to form the ^^ hyaflie'^p^^^^^^ of 

 velvety surface of the hymenium ; proba- Jypha in hymeniai sur- 

 sidia hyaline, even, globose, up to 9^ in um- aTmatml probasidi- 

 diameter: spores simple, hyaline, even, ""^' ^' probasidium with 



' ^ x- 7 J 7 7 young spore-bearing or- 



Sllghtly curved, 11-13 X 3%-4y2/M, borne gan; 6, spore-bearing or- 



on a few-celled, spore-bearing organ ^^' ^' ^p^^* ^ ^'^^^ 

 about 20-30 X 4-5/^, slightly curved at first. 



Fructifications more than 6 cm. long, more than 1% cm. 

 wide. 



On bark, Maravals, Trinidad, West Indies. 



This species is characterized by its very thin, velvety fruc- 

 tification, pallid smoke-gray with a slight lilac tint, fine 

 hyphae, and small probasidia, spore-bearing organs, and 

 spores. The spore-bearing organs were slightly curved in 

 all cases where spores were attached to them; in the sec- 

 tions some of these organs appeared strongly curved or hook- 

 shaped but my preparations did not demonstrate this point 

 positively, for the numerous curved hyphal branches were 

 confusing. 



Specimens examined: 

 Trinidad: Maravals, R. Thaxter, comm. by W. G. Farlow, 



28, type. 



(To be continued.) 



