1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. IX 201 



bushy, branched, cylindric, bottle-brush paraphyses about 

 4^ fjL in diameter over prongs, uniformly clothed for their 

 length with such lateral outgrowths which are disorganized 

 and dissolved by KHO solution but not affected by dilute 

 hydrochloric acid nor lactic acid, and (2) deeply staining, 

 cylindric organs usually 4J-5 /x in diameter, sometimes clavate 

 and then up to 9 /* in diameter; spores hyaline, even, 1^15 X 

 9-12 fji. 



Fructifications 1-lJ cm. broad, 7 cm. long, and broken at 

 both ends. 



On small dead twigs of f rondose wood. Cuba. March. 



This species may be recognized at the time of collection by 

 its snow-white color, very thin fructification which resembles 

 a thin Corticium, and occurrence along one side of small dead 

 twigs of f rondose species; the small, even spores and bushy 

 paraphyses whose bottle-brush outer surface is disorganized 

 by treatment of preparation with KHO solution afford good 

 distinctive microscopical characters. Mature basidia, when 

 found, may show that this species belongs in Sebacina rather 

 than in Aleurodiscus a view which seems the more probable 

 because of the peculiar effect of KHO solution upon the 

 paraphyses. 



Specimens . examined : 

 Cuba; C. G. Lloyd, 421, 422, type (in Mo. Bot. Gard. Herb., 

 55178, 55179 respectively). 



13. A. penicillatus Burt, n. sp. 



Type : in Burt Herb. 



Fructification resupinate, effused, adnate, cracking in dry- 

 ing, pale ochraceous-buff at first, becoming between light buff 

 and pinkish buff in the herbarium, the margin determinate; 

 in structure about 200 /i thick, composed of loosely interwoven, 

 suberect, hyaline hyphae 3 /i in diameter, occasionally nodose- 

 septate, not incrusted ; hymenium composed of large, clavate 

 basidia about 75x18 /i, with large sterigmata, and of flexuous 

 paraphyses about 6 /i in diameter, of several forms, of which 

 the most noteworthy have about the obtuse apex a cluster of 

 about 12 acicular branches, each about 4 fi long; spores hya- 



