SAPROPHYTIC P^TNGI OF EASTERN IOWA. 



IV. 



V. 



VI. 



VII. 



VIII. 

 IX. 



X. 



XI. 

 XII. 



XIII. 

 XIV. 



Sporocarp semi-stipitute, pores alveolar; arranged 



in ratliating series from the stipe, . . . Favolus. 



Sporocarp agaricine; tubules laniellose, disposed 



in circles concentric to tlie s ipe, . . . Cyclomyces. 



.Sporocarp dimidiate, coriaceous ; pores sinuous, 



labyrinthine, D.ed.vlea. 



Spoiocarp usually woody or corky; tubules une- 

 qually sunk into the substance of the pileus, 

 round or elongate, entire, .... Tramete.s. 



I). Tubules fanning a stratum distinct from the pileus. 



Fructification wholly resupinate ; pileus obsolete, Poria. 



Tubules at first punctiform, developed from the 

 center of fructification outwardly; hymeno- 

 phore coriaceous or membranaceous, . . Polystictus. 



Tubules pre-formed, often in successive layers 



or stratose; woody, sessile fungi, . . . Fomes. 



Tubules pre-formed, not stratose; fungi fleshy or 



pliable, stipitate or sessile, .... Polyporu.s. 



Tubules not easily separating from the hymen- 

 ophore nor from each other, formed by numer- 

 ous radiating broader lamellae everywhere con- 

 nected by narrower anastomosing plates, Boletinus. 



Tubules longer, with difficulty separating from 



the hymenophore, not radiate, . . . Strobilomyces. 



Tubules long, easily separable alike from the 



h^■menophore and from each other, . . Boletus. 



I. MERULIUS. 



Pileus generally resupinate, sometimes with free upturned 

 edges or even dimidiate, soft, mycelioid; hymenium waxy 

 spread over shallow pits and obtuse reticulate folds which 

 ultimately form more or less distinct, tortuous, denticulate 

 pores. 



I. Merulius lacrimans ( yacquin) Winter. 



Pileus widely resupinate, often a foot or more in length and 

 breadth, membranaceous, leathery, yellow, ferruginous or 

 brown with a white tomentose border; pores shallow, irregular 

 meshes, at first orange-yellow, at length brown from the 

 abundant spores; these by transmitted light, tan-colored yellow, 

 about iox6. 



This is the far-famed "Dry rot" of the northern world, 

 found everywhere attacking sills and joists in cellars, or beneath 



