MurriLL: THe Potyporacear or NortH AMERICA 603 
hexagonal, white or yellow, at length brown, dissepiments entire, 
obtuse, becoming acute : spores ovoid, obtuse, at the summit, at- 
tenuate and truncate at the base, yellowish-brown, verrucose, gQ-It 
X 5-6: stipe lateral, excentric, central, or wanting, erect to as- 
cending, 0-30 x 0.5-4 cm., equal, irregular, or enlarging above, 
concolorous, glabrous, shining, laccate, the substance similar to 
the context and darker at the center. 
On living or dead trunks, stumps, or roots of oak, alder, hazel, 
maple, willow, honey-locust, sweet-gum, and beech in Sweden, 
Germany, Bavaria, France, England, America and Australia. 
American material has been examined from New York, New Jersey, 
Delaware, Pennsylvania, Ohio, Indiana, Kentucky, Michigan, Vir- 
ginia, North Carolina, South Carolinia, Georgia, Florida, Alabama, 
Mexico, and Nicaragua. 
This fungus has been found fossil in the lake dwellings of 
Switzerland and has been known for a long time on account of its 
conspicuous coloring caused by a thick glutinous juice which ex- 
udes from its surface and dries upon it as a thin lustrous coating, 
Albino or semi-albino forms occur where the coating is lacking or 
incomplete. In age the varnish disappears and the pileus takes on 
@ grayish weather-beaten appearance. As the young pileus begins 
to form at the end of the stipe it is white or yellow in color with- 
out varnish and somewhat resembles an unexpanded agaric. It 
is this stage that Jacquin figured and described in his Flora Aus- 
triaca as Agaricus pseudoboletus, Several immature plants were 
found by him in a grove growing about the base of a dead oak 
trunk. The description he gives is quite a good one and, taken 
with the fine colored plate, leaves no doubt as to the identity of 
the specimens. The succeeding year he collected several mature 
Plants which he described as Boletus rugosus as follows :— 
“Fungus speciosus putridis arborum truncis innascitur, totus lignoso-coriaceus . 
persistens, Stipes durus, inaequalis, badius, vernice veluti obductus, calamum ve 
Policem crassus ratione_voluminis ipsius fungi, pileum gerit plerumque subdimidiatum, 
dum laterali ejusdem parti adnecitur. Hic superne planus est, rugosus primum, ex 
Tubro badius et nitidissimus, tandem hepaticus minusque nitens. Corticis pauca 
Substantia est interne coriacea, holoserisea, cinnamomea, tenax atque ad fomitem 
4pta. Substantia tubulosa concolor, crassa, a corticosa separabilis, subtilissime 
Potosa ; subtus punctata, in principio pallens, sensim magis ciaameniens ad cibum 
inepta. Fungi duo, ex eodem loco exorti, et majores, ie tabula proponentets 
hine atque illiuc spectati. Tum fungulus minor; et fungi pars, ut pateant in- 
~ teriora.”’ 
