[Vol. 11 

 34 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Fructifications up to 4 cm. long, 2 cm. broad. 



On rotten wood. Porto Rico. July. 



This species is related to A. tricolor but is distinct from the 

 latter and noteworthy by the very large, unsymmetrical, seta- 

 like rays which stand out above the general level of the hymenium. 

 The occasional cystidia are an additional separating character. 



Specimens examined: 

 Porto Rico: Rio Piedras, J. A. Stevenson, 5579, type (in Mo. 



Bot. Gard. Herb., 13415). 



J 



\ 5. A. gracile Burt, n. sp. 

 Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, very thin, cobwebby, delicate, with 

 the subiculum light drab and the hymenium pale olive-buff, 

 ^ not continuous but with the basidia in clusters; in structure 150 



y. thick, with hyphae loosely arranged, hyaline, 2-2^ \l in diam- 

 eter, and with colored, stellate organs with central body 6 ji in 

 diameter and very slender, unbranched rays up to 100-150 X 

 3-3J^ ii, often protruding beyond the hymenium up to 45 p; 

 cystidia numerous, not incrusted, fusoid, 30 X 8 ji; basidia 

 15 X 6 \k ; spores hyaline, even, spherical, 6 (i in diameter. 



Fructifications J/-l cm. in diameter. 



On very rotten, frondose wood. Alabama. October. 



The small gray fructifications of A. gracile have the aspect of 

 a delicate, cobwebby Hyphomycete rather than the more compact, 

 spongy structure of other species of this genus. The long, slender 

 rays of the stellate organs and the cystidia are also distinctive. 



Specimens examined: 

 Alabama: Montgomery County, R. P. Burke, Jfi9, type (in 



Mo. Bot. Gard. Herb., 57202). 



r'v. 



I 



6. A. ochrostroma Burt, n. sp. 



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



Fructification effused, dry, felty, ochraceous tawny, with 

 surface becoming shallowly granular in fruiting; in structure 

 200-300 (i thick, composed of both hyaline, thin-walled, flaccid 

 hyphae 2 \i in diameter, and of some ochraceous, stiff, thick- 

 walled hyphae 2 n in diameter, and of very numerous, densely 



