600 MurrILL: POLYPORACEAE OF NORTH AMERICA 
Inonotus radiatus Karst. Rev. Myc. 3: 19. 1881. 
This species was first described from specimens collected on a 
decaying stump in Sussex, England. In the description, Sowerby 
refers to its habit of emerging from the substratum in a small 
woolly mass and then growing in a radiating manner with this 
mass as acenter. He describes the pileus as zoned, with yellow 
margin, and the texture as woody. Berkeley mentions hazel 
stems as its favorite host in England. In Sweden it is abundant 
on hazel and birch, while in Germany and Austria it is found 
mostly on alder, which last is its most common host in America. 
The form found on a prostrate sugar maple trunk and described 
as P. glomeratus by Peck, in 1873, hardly differs sufficiently from 
the typical form to constitute a distinct species. With the two 
forms before me, I can find no specific distinguishing character 
either with the unaided eye or with the microscope. This similar- 
ity was long since noticed and published by Cooke. The relations 
of Polyporus scrobiculatus, and various forms included in /zonotus 
radiatus by Karsten, to the typical form of this species do not 
come within the scope of the present paper. 
Specimens are at hand from England, Plowright; Berlin, 
Magnus, Hennings; Tyrol, Bresadola; Sweden, Murrill; Canada, 
Macoun ; Connecticut, Underwood ; New York, Peck, Earle. 
10. Inonotus amplectens sp. nov. 
Pileus hemispherical, clasping, concave beneath, 1-3 cm. in 
diameter, 1-2 cm. thick; surface soft, velvety, dark yellowish 
orange, margin at first obtuse, entire, straw-colored, becoming 
thin, undulate or toothed, deflexed and concolorous: context soft, 
spongy-fibrous, ferruginous ; hymenium at first honey-yellow, be- 
coming umbrinous, tubes 2-4 mm. long, 2-4 to a mm., larger by 
confluence, umbrinous within, mouths at first closed by a yellow- 
ish membrane, subcircular, regular, entire, becoming large, irreg- 
ular, coarsely toothed and concentrically split into irpiciform 
plates ; spores ellipsoidal, smooth, hyaline, 1-2-guttulate, 4 x 6 p. 
Type specimens of this plant were collected by R. M. Harper, 
7990a, on the Ocmulgee river near Lumber City, Georgia, Sept- 
11, 1903. The fruit-bodies were found encircling living twigs of 
Asimina parvifiora(?). The upper surface of the plant resembles 
Inonotus fruticum (B. & C.), but the hymenium is very distinct. 
