Mycological Flora of the Rockies 119 



PoLYPORUS ALBOLUTEUs E. & E. Sept. Infrequent. Tol- 

 land. On mine timbers of coniferous wood. 



PoLYPORUS CAESius Fr. Sept. Infrequent. Tolland. On 

 very rotten coniferous wood. 



PoLYPORUS ciNNAMOMEus Fr. Sept. Frequent. Leal. Tol- 

 land. On low or sandy ground under pine and poplar, etc. 



PoLYPORUS ciRciNATUS Fr. Sept. Frequent. Leal. Tol- 

 land. Under spruce and fir. 



PoLYPORUS coNFLUENS Fr. (See Plate XXXIV.) 



(A) Tolland. Sept. Common, but scattered-gregarious. 



About a dozen collections were made on succeeding days; 

 special attention was paid to get the possible variations due to 

 age, habit, color, amount of stem-confluence, etc. Although 

 occurring in widely scattered localities on the slopes of the 

 ranges under lodge-pole pine and Engelmann spruce, a day's trip 

 would yield easily a peck or more. A large amount was thus 

 obtained and the facts noted. It seems desirable to record this 

 study in the following description. 



Pilei fleshy, firm, somewhat fragile, either simple and then 

 up to 10 cm. broad, or on branching stems with few pilei, 

 or on confluent to connate stems with several pilei 5-10 cm. 

 broad, orbicular, eccentric or irregularly compressed, sometimes 

 wavy-lobed, convex, obtuse; surface dull white when perfectly 

 fresh, i.e., "ivory-white" (Ridg.), soon "cinnamon-buff" to 

 clay-color" (Ridg.) when rubbed, in age, or after being ex- 

 posed to wind or sun, provided with a more or less differentiated 

 cuticle which becomes either minutely rimose, areolate-rimose, 

 or diffracted-scaly according to weather conditions, showing 

 whitish context between the cracks, glabrous; margin thin al- 

 most membranous, persistently incurved, substerile to fertile. 

 Context when fresh quite thick, 1-3 cm.-[- in thickness, white, 

 fleshy, homogeneous, compact but rather soft when fresh, fragile, 

 but becoming harder and firm in dry weather, slowly assuming 

 a cinnamon-buff" color when broken or attacked by larvae. 



Hymenophore composed of very short tubes, 1-2 mm. long, 

 varying subdecurrent to long-decurrent and somewhat oblique 

 from the oblique position of most stems; mouths not at first 



