416 MurRILL: PoOLYPORACEAE OF NortTH AMERICA | 
Synopsis of the North American species 
1. Hymenium concolorous, pileus smooth, entirely devoid of zones or furrows, context 
soft and friable, spores 2. 3-5 i. ila 
Hymenium differently colored, pileus rarely smooth, context rigid or corky, not 
friable. 2. 
2. Hymenium lilac-colored, tubes 1 cm. or more in length, pileus concentrically sul- 
cate. 2. H. sublilacinus. 
Hymenium dark brown, tubes less than 0.5 cm. in length, pileus smooth or zonate. 3. 
. Context rigid, pileus azonate or with few and indefinite markings. 4 
Context flexible, pileus plainly and definitely multizonate. 3. H. lienotdes. 
bo 
> 
. Context bright ferruginous, hymenium fulvous to fuliginous, spores elongated, 
: 4. A. gilvus. 
Context pallid, hymenium subfulvous, spores subglobose to ovoid, 3-4 #4 in diameter. 
‘witinclus. 
aie? 
Context brown, hymenium brownish-gray, pileus reddish-brown, finely hispid behind, 
spores ovoid, 3 X 3.5u. 6. H. hispidulus. 
1. Hapalopilus rutilans (Pers.) 
Boletus suberosus Bull. Herb. France, 11: 354. pl. 482. 1791 
Not B. suberosus L. Sp. Pl. 1176. 1753. 
Boletus rutilans Pers. Icon. et Descrip. 18. pl. f. 4. 1798-1900. 
Polyporus nidulans Fr. Syst. Myc. 1: 362. 1821. 
Polyporus rutilans Fr. Syst. Myc. 1: 363. 1821. 
Flapalopilus nidulans Karst. Rev. Myc. 3: 18. 1881. 
Lnonotus nidulans Karst. Finlands Basidsv. 332. 1889. ; 
This species seems to have been described independently under 
different names by both Bulliard and Persoon, though the name 
assigned by the former had been previously used by Linnaeus 
When Fries studied the plant he gave it the name P. widulams, 
following it with Persoon’s P. rutilans, which, he naively remarked, 
was perhaps a variety of P. nidulans. The two species were kept 
distinct by Berkeley, but he had little and poor material and ev 
dently did not know them very intimately. a 
The plant appears to grow on most deciduous wood, being" 
found on birch, dogwood, hazelnut, hickory, oak and other decid- 
uous trees, with a preference in this country, perhaps, for hickory: : 
Collections: are at hand from Paris, Patoutllard ; Connecticut 
Underwood, Earle, White; Pennsylvania, Rau, Stevenson; tee 
York, Underwood ; Kansas, Cragin ; lowa, Macbride ; Greenland, 
Rostrup ; Austria, Bresadola. . 
