214 Hyincnomyceleae, Hydncfe, IrpeX. 



pileos irregulares foriDantibus, fibroso-carnoso, molli, tenuissiino, 

 albo V. albido-flavescente, supra tenuiter villoso; stipite basia ver- 

 3US attenuato, lougo, concolori, inira flavescente, tenuiter fibroso- 

 carnoso; hymenio in plicis lamellatis, marginem versus reticulatim 

 dispositis et partim connexis, albis, carnosis, tenuibus; basidiis hya- 

 linis, iu parte sporigera incrassalis v. clavatis, sporas quiuque octo 

 gerentibus, sterigmatibus tenuissimis in apice basidii orbiculariter 

 dispositis; sporis ovoideis v. subglobosis, hyalinis, membrana tenuis- 

 sima, glabris, 3-5 - 2-3. 



Hah. in locis humosis sub saxis prominentibus ad Trins Tiro- 

 lia?. — Pileus l-^Vg cm. diam.; stipes 1-2 cm. long. I. radicaio 

 vix affinis. 



3. Irpex fusco-violaceus (Schrad.) Fr. — Syll. VI, p. 483. — Var. 858 

 stipitatus Wettst. Vorarb. Steier. I, p, 32. — Pileo plus minus in 

 stipitem crassum coutracto, pendulo, subcampanulato. 



Uah. ad sepes pr. Feistritz Stiriae. 



4. Irpex ambiguus Peck 40 Rep. p. 55. — Resupinatus, adnatus, mi 859 

 nute caespitosus; subiculo tenuissimo, flocculoso-pruinoso, albo dein 

 expallente; aculeis obliquis, basi subcoalitis, minutis, variabilissi- 

 mis, subulatis et integris v. compressis, acutis, truucatis, ramosis, 

 incisis vel subserratis, albis dein expallentibus. 



Hab. ad lignum et corticem fagineum, Adirondack Mountains 

 Amer. bor. 



5. Irpex rlniosus Peck 43 Rep. p. 22. — Resupinatus, primo orbi- Sfio 

 cularis, dein confluens, irreguiariter caespitosus, tenuis, albidus v. 

 pallidn? dein rimoso-areolatus, margine pli:'^ minus libero v. sub- 

 reflexo , aymenio primo subporoso vel daedaloideo; dissepimentis in 

 aculeos subulatos, compressos v. incisos, dein fascicuiares productis. 



Hab. ad corticem Betulse lutea?, Catskill Mountains Amer. bor. 



6. Irpex nodulosus Peck 41 Rep. p. 79. — Resupinatus, caespitosus, 861 

 10-25 cm. et uitra diam., subseparabilis; subiculo crasso, tenaci; 

 hymenio versus marginem crassum definitum dentato-poroso, cen- 

 tro noduloso et aculeis mzequaiibus, compressis, truncatis vel ia- 

 ciniatis, rarius tereti-acutis producto, albido, centro flavido vel 

 pallide ferrugineo. 



Hab. ad corticem truncorum Populi, Gausevoort Amer. bor. 



RADULUM Fr. — Syll. VI, p. 493. 



1. Radulum fruticum Karst. Rev. Myc. 1884, p. 214. — Longitudinali- 862 

 ter effusum crustaceum, subglabrum, ligneo- vel albido-pallescens; 



