(Vol. 12 

 246 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Fructifications widely effused, closely adnate, thick, layered 

 or zonate within, avellaneous, pruinose, contracting in drying and 

 cracking into more or less connected masses about 1 mm. in 

 diameter, the margin thinning out; in section 700 jjl thick, prob- 

 ably stratose but perhaps with merely a hymenium of several 

 (4 in the type) layers or zones, not colored, composed of densely 

 arranged h^^ihae about 23/^-3 [l in diameter, with somewhat 

 gelatinously modified and indistinct, not sharply defined as 

 tramal, and hjTnenial layers; no gloeocystidia; cystidia not 

 incrusted, 3 [jl in diameter at the base, tapering to a sharp apex, 

 protruding up to 30 [i, very numerous in the surface of the 

 hymenium; spores hyaline, even, curved, 434 X 2}/2 |x, copious. 



Portion of fructification 7 cm. long, 4 cm. wide, broken off at 

 one end and on sides. 



On decayed coniferous wood. Oregon. March. 



The cystidia are so small and so very numerous in the hymenial 

 surface and the season when collected — March — so early in the 

 year that it is possible that this species is a stratose Corticium 

 just starting a new outer stratum on its fructification, but I do 

 not recognize it as a Corticium at present known to me. No 

 matter what the genus may prove to be, the thick, somewhat 

 liver-colored fructifications of layered or stratose structure, and 

 notably cracked, should always make this species easy to recog- 

 nize. 



Specimens examined: 

 Oregon: Corvallis, S. M. Zeller, 2252, type (in Mo. Bot. Card. 



Herb., 63030). 



32. P. laminata Burt, n. sp. 



T^'pe: in Burt. Herb. 



Fructifications broadly effused, thin, adnate, not separable, 

 cream-buff to warm buff, pubescent, somewhat tubercular, at 

 length cracking into small masses 2-3 to a mm., the margin 

 thinning out, fibrillose; in section 75-140 [jl, rarely 200 ix, thick, 

 not colored, becoming stratose, 1-6 strata, each composed of a 

 supporting layer of loosely arranged, erect, hyaline hyphae 3- 

 Z]/2 (X in diameter, thin-walled, collapsing, not incrusted, and of a 

 compact hymenial layer; no gloeocystidia; cystidia not incrusted, 



