640 MuRRILL : POLYPORACEAE OF NORTH AMERICA 



Polyporus tomentoso-quercinus Johnson, Bull. Minn. Acad. 

 Nat. Sci. I : 338. 1878. Described from the author's collec- 

 tions in Minnesota as follows : 



" Pileus at first soft, compact, spongy, tomentose, pulvinate, dimidiate, sessile, 

 very thick, divergently fibrous within, broad surface of attachment, dirty grayish white 

 when young, pale straw or subferruginous when old, hard, coriaceous, woody at 

 maturity ; pores large, irregular, toothed or fringed, easily separated, from ^ to I inch 

 long, varying in color from straw to bright orange." 



" Nearly always on the north side of living oaks. Pileus I to 2 inches thick, 2 to 

 5 inches broad. Spores numerous, white, globose, very small. Drops its spores in 

 May or early June. Plant is persistent, lasting the whole year. * * * Very scarce, 

 only seen occasionally." 



The above description applies very well to the western form of 

 Trametes imicolor. It is necessary, however, to see the type plants 

 before definitely connecting the two forms. 



CORIOLUS Quel. Ench. Fung. 175. 1886 



Hanscnia Karst. Medd. Soc. Faun, et Fl. Fenn. 5 : 39. 1879. Not 



Hans oiia Turcz. 1844. 



The genus Hanscnia was founded upon Hansenia liirsnta 

 (Wulf), with seventeen additional species, and thus described : 



" Receptaculum pileatum, dimidiatum, sessile, primitus aridum et firmum. Pileus 

 cuticula tenui, fibrosa, coriaceus, villosus, zonatus, contextu floccoso, tenaci. Hyme- 

 nium homogeneum. Pori trama pilei distincti ejusque substantiae verticaliter oppositi, 

 subrotundi." 



Unfortunately, the name Hanscnia had been proposed by 

 Turczaninow as early as 1844 (Bull. Soc. Nat. Mosc. 17 : 754) for 

 a genus of the Umbcllifcrac and is consequently ineligible, leaving 

 the vacancy to be filled by Coriolns of Quelet, founded upon Poly- 

 porus zonatus Fr. and seven other species, with the following 

 description : 



" Pileus villosus, zonis concentricis, vulgo discoloribus, fasciatus. Spora oblonga, 

 alba. Lignatiles." 



Polyporus lutcsccns Pers., the first species listed by Quelet 

 under Coriolus, is accompanied by the citation of a figure, but 

 this citation was but doubtfully given by Persoon in the original 

 description and the recent investigations of Bresadola, who has 

 examined Persoon's types, do not tend to confirm Quelet's 

 opinion. The type of Coriolus, therefore, is P. zonatus, the first 

 species accompanied by a correct citation of a figure. 



The species of this genus are mostly thin, dry plants with a 





