1916] 



BUKT THELEPHOEACEAE OF NORTH AMEEICA VI 207 



11. Fructification felty-membranaceous, light mineral-gray, 400/i thick, two- 

 layered; hyphae 4/i in diameter; spores deep olive-buff to hyaline under 

 the microscope, rough-walled or aculeate with very short points; on 



ground in Massachusetts 16. H. epigaeus 



12. Fructification separable from substratum when moistened 13 



12. Fructification adnate, fawn-color, under side and margin whitish; 

 hyphae suberect, thin-walled, 21^-3/a in diameter, hyaline under the 



microscope; known from Washington SS. H. cervinua 



13. KHO solution causes a color change when added to sections immersed in a 



drop of water in making preparations 14 



13. KHO solution causes no noteworthy color change 15 



14. A change of color to between blue-green and sage-green is caused 

 in the granules; fructification Chaetura-drab to fuscous, gran- 

 ular, the margin much paler, brownish and floccose; hyphae some- 

 what colored, 3-4;tt in diameter 17. H. botryoides 



14. A change of color to sage-green is caused in the hymenium; fructifi- 

 cation brownish olive, granular, the margin ochraceous-tawny ; hy- 

 phae somewhat colored, only occasionally nodose-septate, 2i^-3^/a in 

 diameter, forming occasional rope-like strands next to substratum. 



18. H. coriarius 



14. Original colors are destroyed and the hyphae become sage-green; 

 fructification olive-ocher at surface, with under side and margin 

 brownish drab; hyphae 3/u, in diameter, with some rope-like hyphal 



strands next to substratum 19. H. hicolor 



15. Fructification between walnut-brown and Vandyke-brown (a ''dark red") 

 and the margin Isabella-color or melleus; hyphae colored, 5-6/x in di- 

 ameter, with rope-like strands next the substratum 20. H. atroruber 



15. Fructification with upper side pinkish buff to Isabella-color, the under 

 side and margin bister; hyphae, 5-7/t in diameter, run along the sub- 

 stratum and give off suberect, interwoven, colored branches 3^-4i4/a in 



diameter no rope-like strands .23. R. fuligineus 



15. Fructification drab-gray, the margin whitish; hyphae hyaline under the 



microscope 24. H. cinerascens 



16. Hyphae not nodose-septate, i. e., not having clamp connections 17 



16. Hyphae nodose-septate 18 



17. With cystidia; fructification pinkish buff, adnate 25. E. peniophoroides 



17. Without cystidia; fructification becoming warm buff, thick, and firm, 

 like Corticium portentosum ; hyphae 2/a in diameter, terminating in the 

 hymenium in dichotomously branched, antler-shaped organs; basidio- 

 spores hyaline or nearly so; even spores, colored like the hyphae, abun- 

 dant between the hyphae 26. H. thelephoroides 



17. Without cystidia; fructification pinkish buff to cinnamon-buff and avel- 

 laneous; hyphae 3%-5/a in diameter, forming some rope-like strands next 

 to substratum; spores with a slight tinge of buff in collection on 

 slide but hyaline under the microscope, echinulate, the body 5-6x4-4^^/*. 



27. H. zygodesmoides 



17. Without cystidia ; fructification Naples-yellow to deep colonial buff; 

 hyphae 3-4/* in diameter, not forming rope-like strands; spores con- 

 colorous but sometimes hyaline under the microscope, echinulate, the 



body 4-5/A in diameter 28. H. echinosporus 



18. Fructification between olive-buff and deep olive-buff; spores con- 



colorous, very pale under the microscope 29. H. fibrillosus 



18. Fructification honey-yellow to drab and fuscous, the margin whitish 

 or yellowish, flaxy-fibrillose, radiating; spores white in collection 

 on slide, minutely echinulate with short, crowded spines, body 

 3-5x2%-3%itt 30. H. fumosus 



1. Hypochnus ferrugineus Pers. ex Fries, Obs. Myc. 2:280. 

 1818 and 1824; Karsten, Finska Vetenskaps-Soc. Bidrag 

 Natur och Folk 37:162. 1882; Finl. Basidsv. 440. 1889; 



