638 Murrill: Polyporaceae of North America 



as a varietal name under P. suaveolens in the Elenchus. Other 

 contemporary botanists seem to have concurred in this view of the 

 matter. 



The species is certainly very near to P. suaveolens and was 

 considered the same by Linnaeus. It has been reported only on 

 willow from the northern parts of Europe and Asia. On com- 

 paring North American plants collected on willow with speci- 

 mens at Kew and other foreign herbaria, it appears that they are 

 all T. odora, differing from the Southern European species in be- 

 ing at first pubescent and at length smooth, with minor differences 

 in context and pores. From what we know of distribution in the 

 northern hemisphere, we should expect to find the more north- 

 erly species continuous around the globe. 



Very few specimens are to be found in the herbarium here, 

 although the plant is certainly not rare on willow in this country 

 and its appearance is well known to most collectors. The follow- 

 ing specimens are at hand: Maine, Harvey; New Hampshire, 

 Wilson ; Vermont, Burt ; New York, Underwood, Shear, Banker, 

 Peck; New Jersey, Ellis ; Pennsylvania, Gentry. Accompanying 

 the specimens collected recently by Banker was the following ex- 

 cellent field diagnosis : 



" Odor of anise. First growing from the side of standing and 

 then from fallen dead willow. In each case hymenium horizontal. 

 Plant dimidiate, sessile, spreading to some extent beneath the 

 prostrate log. Whitish throughout, becoming gray with age. 

 Upper surface pubescent. Substance solid, tough, subwatery, 

 elastic, resembling somewhat Piptoporus suberosus ; stratified, the 

 new growth continuous from the upper side of pileus around 

 margin and ever the hymenium. In old specimens these layers 

 can be peeled off as in an onion." 



2. Trametes unicolor (Schw.) 



Boletus unicolor Schw. Syn. Fung. Car. 71. 181 8. 



Polyporus unicolor Fr. Epicr. 458. 1838. 



Polyporus obtusus Berk. Ann. Mag. Nat. Hist. 3: 390. 1839. 



This species was collected in quantity on the trunks of living 

 trees in North Carolina and described by Schweinitz very fully. 

 According to him it is always to be found about half way up the 



