96 



Mycologia 



Collected on a dead log of Pseiidotsuga taxifolia. 

 Seattle, 84 {type). 



Tyromyces semipileatus (Peck) Murrill. Common on fallen 

 trunks and branches of alder and maple. 



Seattle 58, 67; Corvallis, 950; Muir Woods, /i^p; Preston's 

 Ravine, 1183. 



Tyromyces substipitatus sp. nov. 



Pilei subcespitose, at times united above, irregularly sub- 

 circular or flabelliform, depressed, milk-white throughout, 2-4 

 cm. broad, 2-3 cm. high, 2-3 mm. thick; surface glabrous, 

 uneven, lightly marked with irregular, radiating, raised lines, 

 margin thin, concolorous, sterile, undulate or slightly lobed, 

 slightly blackening when bruised ; context fleshy, fragile when 

 dry, very thin; tubes small, regular, fragile, collapsing, edges 

 thin, toothed ; spores ovoid, smooth, hyaline, 4X2.5^; stipe erect, 

 lateral or subcentral, enlarging upward, reticulated on one side, 

 owing to the undeveloped tubes, 1-2 cm. long, 2-4 mm. thick. 



On rich soil mixed with humus, but not attached to wood. The 

 species is aberrant, partly on account of its habit of growing 

 upward from the ground, and might be classed with the stipitate 

 forms of the polypores. It is closely related, however, to 

 Tyromyces semisupinus, and may as well be placed in that genus 

 as in any other. 



Seattle, 75 (type). 



Tribe FOMITEAE 



Cryptoporus volvatus (Peck) Shear. Frequent on dead coni- 

 ferous trunks. 



Seattle, 80; Glen Brook, yp2; Golden Gate Park, 1106. 



Elfvingia megaloma (Lev.) Murrill. Common and abundant 

 in every locality visited, usually on oak logs and stumps. 

 Seattle, 4p; Tacoma, P4; Corvallis, looi, 1008; Muir Woods, 



1151. 



FoMES ANNOSUS (Frics) Cooke. Found several times on logs 

 and stumps of red fir. It is probably common on conifers but 

 difficult to find because inconspicuous and often hidden. 

 Seattle, 8g, pj; Newport, 1089. 



