[Vol. 12 

 306 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



usually starting from the substratum and wholly immersed, 

 sometimes protruding beyond the basidia; cystidia, if really 

 distinct from gloeocystidia, not incrusted, 4J^-8 y. in diameter, 

 protruding up to 30 y. beyond the basidia; spores hyaline, even, 

 5-7V 2 X 3-4 (x. 



Fructifications 2-8 cm. long, lJ^-3 cm. wide. 



On wood and bark of decaying Alnus tenuifolia and Quercus 

 californica. Idaho and California. October. 



The gloeocystidia, sometimes of zigzag form, and cystidia, 

 which are possibly only protruding portions of gloeocystidia, are 

 marked characters of the type specimen which should afford 

 recognition of P. albo-straminea if these are constant specific 

 characters. However, the buff color, Alnus substratum, and 

 presence of gloeocystidia should suffice. In No. 17069 a foreign 

 mycelium of coarse hyphae is underneath the fructification 

 proper. 



Specimens examined: 

 Idaho: Priest River, J. R. Weir, 17069, type, and 16818 (both in 



Weir Herb.). 

 California: Massack, Plumas National Forest, A. S. Rhoads, 17 



(in Mo. Bot. Gard. Herb., 56986). 



I 



82. P. Taxodii Burt, n. sp. 



Type : in Burt Herb. 



Fructifications effused, very thin, closely adnate, whitish to 

 pale olive-buff in the herbarium, the hymenium loose and rather 

 hypochnoid under a lens, the margin indeterminate, thinning 

 out; in section 45-60 \l thick, not colored, composed of erect, 

 branching hyphae 2-23^ [i in diameter, not incrusted, not nodose- 

 septate, and of numerous cystidia, gloeocystidia, and crystalline 

 matter; cystidia not incrusted, thin- walled, tapering to a sharp 

 apex, 6-8 [x in diameter, protruding 20-40 y. beyond the basidia, 

 often starting from the substratum; gloeocystidia often not dis- 

 tinguishable from the cystidia except by granular, deeply staining 

 contents, protruding up to 20-40 [x beyond the basidia; spores 

 hyaline, even, 7-7J^ X 3-3J/2 ^. 



Fructification 7 cm. long, lJ^-2 cm. wide. 



On decorticated top limb of prostrate top of Taxodium dis- 



