[Vol. 12 

 290 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



or stratose, composed of a layer next to the substratum of inter- 

 woven, tough, hyaline hyphae 3-4 jjl in diameter, and of 1-4 hy- 

 menial layers; no gloeocystidia; cystidia not incrusted, cylindric, 

 80-150 X 6-9 [X, protruding up to 80 [i beyond the basidia, not 

 destroyed by potassium hydrate treatment; basidia with 4 

 sterigmata; spores hyaline, even, 12-15 X 4-6 [x, copious. 



Fructifications 5 mm.-23^ cm. long, 3-10 mm. wide, rarely 

 5-10 cm. long by confluence. 



On decorticated decaying wood and fence rails of Pinus albi- 

 caulis, P. contorta, P. flexilis, P. Murrayana, P. silvestris, Abies 

 grandis, Larix, Pseudotsuga, and Thuja. In northern Europe, 

 and in Wyoming, Montana, Idaho, British Columbia, Wash- 

 ington, and Arizona. Frequent. 



P. odorata may be recognized by its small, thick, pulvinate, dry, 

 velvety, pallid fructifications on old, weathered, blackened, coni- 

 ferous wood, by large spores, and stratose fructifications which 

 have even cystidia not affected by the potassium hydrate treat- 

 ment of sections. Karsten referred his specimens to Stereum 

 odoratum Fries, and Bresadola included the Karsten specimens 

 under his Stereum Karstenii Bres., of which I regard the type to 

 be a gathering made by Kmet in Hungary. 



Specimens examined: 

 Finland: Mustiala, P. A. Karsten, type of Phanerochaete odorata. 

 Sweden: Bedaro, L. Romell, 412; Lappland, L. Romell, 412; Stock- 

 holm, L. Romell, 369. 

 Montana: Anaconda, J. R. Weir, 583 (in Mo. Bot. Gard. Herb., 

 63173) ; Bernice, E. E. Hubert, comm. by J. R. Weir, 12011 (in 

 Mo. Bot. Gard. Herb., 63322); Hecla, E. E. Hubert, comm. by 

 J. R. Weir, 11405 (in Mo. Bot. Gard. Herb., 63260) ; Choteau, 

 /. A. Hughes, comm. by J. R. Weir, 5824 (in Mo. Bot. Gard. 

 Herb., 55649); Libby, E. E. Hubert, comm. by J. R. Weir, 

 11351 (m Mo. Bot. Gard. Herb., 63259); Melrose, E. E. Hu- 

 bert, comm. by J. R. Wen-, 11427, 11433, 11439 (in Mo. Bot. 

 Gard. Herb., 63261, 63274, 63279); West Butte, /. A. Hughes, 

 comm. by J. R. Weir, 5496 (in Mo. Bot. Gard. Herb., 55647). 

 Wyoming: Fox Park, J. R. Weir, 10018 (in Mo. Bot. Gard. Herb., 



55789). 

 Idaho: Bonanza, G. G. Hedgcock, comm. by C. J. Humphrey, 



