604 Murritt: THe PotyporAcCEAE oF NorrH AMERICA 
The specimen upon which Leysser’s Boletus ucidus is founded 
was collected by Curtis on a decaying hazel stump near London 
in November, 1780, and figured in Flora Londinensis, 4: pl. 224. 
Leysser’s description is as follows :— 
“ Boletus lucidus stipitatus, pileo coriaceo castaneo lucido sulcis circularibus, poris 
minutissimis, albis, stipite laterali.” 
Specimens collected by Rev. M. A. Curtis in South Carolina 
seemed to Berkeley sufficiently distinct from Leysser’s plant to 
constitute a new species, which he thus describes in Kew Garden 
Misc. 1: 101. 1849 :— 
**Pileus excentric, soft-corky, sulcate, zonate, ochroleucous, in places sanguine- 
lacquered ; stipe elongated, rugose, sanguine-lacquered; hymenium from ease 
ochraceous, pores punctiform.’’ 
A special study of many specimens called Polyporus Curtisu 
Berk. shows them to be only variations of G. pseudoboletus due to 
age, rapidity of growth, and perhaps to differences in the host. 
The yellowish form so common in the southern part of the United 
States is figured by Bulliard and Gillet as also occurring in France, 
while farther north the color is usually darker and more lustrous, 
the texture firmer, and the hymenium less stratose. These differ- 
ences are not sufficiently constant, however, to enable one to 
separate the forms geographically. : 
Another interesting variation observed by Langlois in Low. 
siana is so distinct from the ordinary form of the plant that it 
might easily deceive the skilled mycologist. Specimens in the 
Underwood herbarium have the stipe exactly central, the pileus 
very even and thin, at first deeply infundibuliform with white 
margin, at length becoming nearly plane, reddish-brown, and pol- 
ished, with the margin concolorous. 
3. Ganoderma sessile sp. nov. 
A large sessile plant, with wrinkled varnished cap and i 
margin, found on decaying deciduous trees. Pileus corky 
woody, dimidiate, sessile, imbricate or connate at times, conchate, 
thickest behind, thin at the margin, 5-15 x 7-25 x I-3 ae 
yellow to reddish-chestnut, at length opaque dark brown, suriay 
glabrous, _laccate, shining, radiate-rugose, concentricall 
cate, usually marked near the margin with alternating bay 4° 
tawny zones; margin very thin and acute, usually curved down- 
