602 Murritt: THe PoLtyporAcEAE OF NortH AMERICA 
cays or falls a prey to insects. So subject is it to insect attack 
that recognizable specimens are rare in the herbarium. As its 
ordinary host is confined to America, there is no reference to it in 
European literature, unless the plants found on Picea excelsa by 
Karsten in Sweden belong here rather than with G. pseudoboletus. 
Extensive collections of various forms of this species were 
made by Professor Underwood at Syracuse, N. Y., in July 1884, 
and at West Goshen, Conn., August 1896. Miss A. M. Vail 
brought specimens from Tyringham, Mass., in August 1897." 
Professor G. F. Atkinson has figured the species in plate 66 of 
his work on mushrooms. Wherever the hemlock grows it appears 
to be common, It is nearly related to G. pseudoboletus, but is 
annual, grows on coniferous trees, decays soon after maturity, and 
is usually much lighter in weight and paler in substance. 
2. Ganoderma pseudoboletus (Jacq. ) 
Agaricus pseudoboletus Jacq. Flor. Austr. 1: 26-27. pl. 44. 
1773. 
Boletus rugosus Jacq. Flor. Austr. 2: 44. pl. 169. 1774: 
Boletus lucidus Leyss. Flora Halensis, 300. 1783. 
Boletus obliquatus Bull. Herb. de la France, f/. 7. 1789: pl. 
459. 1790. 
Polyporus lucidus Fries, Syst. Myc. 1: 353. 1821. 
Polyporus laccatus Pers. Myc. Eur. 2: 54. 1825. 
Polyporus Curtisti Berk. Kew Gard. Misc. 1: 101. 1849. 
A large fungus common on decaying trunks and stump® of 
deciduous trees conspicuous on occount of its brilliant varnia 
appearance. Pileus corky to woody, usually kidney-shape¢, 
convex above, concave below, 2-20 x 2-25 x I-5 cm., yellow to 
reddish-chestnut or black; surface glabrous, shining, laccate, 
broadly sulcate and usually marked with concentric lines oF bands 
of a darker color; margin white or light yellow, sterile, eee 
acute, becoming truncate, sulcate, and concolorous as new stra : 
are added ; context soft-corky or woody, radiate-fibrous, cone” 
trically banded, ochraceous above, tawny next to the hymen 
tubes one- to many-layered, the strata varying in distinctnes® 
0.5-2 cm. long, 3-5 to a mm., brown within ; mouths circular © 
hemlock 
eorge, iD 
* During the summer of 1902 fine specimens have been collected in the 
grove of the New York Botanical Garden by Messrs. Burnham and G 
Connecticut by Miss White, and in Ohio by Professor A. D. Selby. 
