RcsHpinatc ilyiiu'n<nnycclcs. Wnkcjh'hl cV Pearson. 71 



been recorded on conifers. The Weybridge specimen is 

 noteworthy for occurring on birch bark. 



Corlkium nivco-crcmcum von Hoehn. ct Litsch. Oesterr. 

 Corticieen, in Wiener Festschrift, 1908, p. 65. and in 

 Sitzber. k. Akad. Wiss. Wien, Malh.-naturw. Kl., Hd. 

 CXVII, 1908, p. 1 1 17. 



I^ffused, indeterminate, very thin, greyisii white to cream, 

 closely adherent to the substratum. liymenium when fresh 

 waxy and slightly granular in 

 places, when dry very minutely 

 and abundantly cracked, giving 

 a characteristic appearance as 

 seen under the lens, the cracks 

 being bridged by numerous fine 

 byssoid strands of the subiculum. 

 Basidia very abundant, more or 

 less clavate, but rather abruptly 

 broader and truncate above, 

 with 4-6-8 (freciuently 8) sterig- 

 mata, 15-35 x 7-10/^1. vSpores 

 cylindric - ellipsoid, one side 

 flattened or slightlv incurved, 

 6-7x3-3-3/^ occasional spores up to 10x5//.. Basal hyphae 

 indistinct, branched, septate, with clamp-connections at the 

 septa, 4-5//. 



On a piece of very rotten wood under alders, Weybridge, 

 A. A. Pearson, Jan. 12, 1918. 



The numerous white species of Corticium are difficult of 

 distinction in words. The present species is marked by a 

 quite characteristic appearance when drv, and in spite of 

 its name is hardly snow-white, but rather grevish white. The 

 basidia and spores are further distinguishing features. 



Corticium niveo-cremeiivi 

 V. Hoehn. & Litsch. 

 a, Spores; b, Two basidia; 

 c, Basal hypha x 850. 



Corticium arachnoidcum Berk., hotryosum Bres., subcoro- 

 natum von Hoehnel & Litsch., confluens Fr., con- 

 fine Bourd et Galz., sulphiireum Pers., cchinos- 

 porum Ellis (pink form), comcdens Fr. 



Corticium (Gloeocystidium) praetermissum (Karst.) Bres., 

 albostramineum (Bres.) Wakef., porosum Berk, et 

 Curt. 



Peniophora gJebulosa Bres. subsp. subiiJata Bourd. et 

 Galz. in Bull. Soc. Mvc. Fr. 191 2, p. 385. 



