[Vol. 13 

 182 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



N. Y. Bot. Card. Herb, (in Mo. Bet. Card. Herb., 54464, 

 54459); Parral, Chihuahua, E. 0. Mathews, 19 (in Mo. Bot. 

 Card. Herb., 44127). 

 Japan: Kogura Prov., Kozuka, A. Yasuda, 154 (in Mo. Bot. 

 Card. Herb., 62956). 



5. C. granulare Burt, Mo. Bot. Gard. Ann. 10: 187. 1923. 

 Type: in Mo. Bot. Gard. Herb. 



Fructification effused, adnate, snow-white, pulverulent under 

 a lens, very thin, only 15-30 ;jl thick, not bearing a continuous 

 h\Tiienium but consisting of bushy branched, suberect hyphal 

 clusters standing out from the sifbstratum and near together, 

 with their main trunks up to 6 ;x in diameter and short-celled; 

 no cyrtidia nor gloeocystidia; basidia simple, 15 X 4:}/^ \l, with 

 4 sterigmata; spores hyaline, even, flattened on one side, 4r-4}/2 

 X 3-4 [JL, copious. 



Fructifications scattered along the substratum, 1-3 cm. long, 

 4-8 mm. wide. 



On dead herbaceous stems. Hawaiian Islands, F. L. Stevens, 

 381, type (in Mo. Bot. Gard. Herb., 60603). 



6. C. ermineum Burt, n. sp. 

 Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, thin, closely adnate, white, not shining, 

 not cracked, the margin similar, thinning out, fimbriate; in 

 section 200 [x thick, not colored, with some hjphae densely ar- 

 ranged along the substratum but becoming suberect and more 

 loosely arranged towards the hymenium, 3 [x in diameter, in- 

 crusted, not nodose-septate; no gloeocystidia; spores hyaline, 

 even, 7-9 X 5-6 [l, copious. 



Fructifications up to 12 cm. long, 3 cm. wide. 



On decorticated, very rotten wood of logs of Thuja plicata and 

 spruce. Vermont and Idaho. August and October. 



C. ermineum is distinct among our white species of Corticium 

 by its ermine- white color, well-incrusted hj^Dhae, large spores and 

 occurrence on coniferous wood. C. amylaceum of France, of 

 which I have a cotype, is a related species but thinner, more 

 farinose, and less compact. 



