Boletus flavus Poll. Fl. Ver. 3: 607. 1824. 
Polyporus hispidus Fr. Syst. Myc. 8's 362) 3189. 
Polyporus endocrocinus Berk. Lond, Jour. Bot. 6: 320. 1847. 
| Inonotus hispidus Karst. Medd. Soc. Faun. et Fl. Fenn. §: 39. 
MurrILL: PoLyporAcEAE oF NortH AMERICA 595 
1870. 
Tnodermus hispidus Quél. Ench. 172. 1886. 
As one would naturally suppose, such a large and attractive 
plant as this did not long remain unnoticed by the early mycolo- 
gists. Micheli refers to it as the “ hairy and obscure agaric with 
golden hymenium.” Batarra figures it and calls it Agaricus fava- 
_ stnosus uvidus, Scopoli describes it as a Boletus with reddish hispid 
Surface and white or reddish hymenium occurring on the trunks 
and branches of trees; and he assigns to it the specific name /zr- 
sutus. Bulliard not only described it well under his name Boletus 
hispidus, the name by which it is best known, but he also made 
two excellent plate figures of it showing its stages and varieties. 
Under one name or another it has received attention from nearly 
all writers who have treated this group. 
To the stranger in Europe there are few more attractive species 
‘mong the fungi. It grows in considerable abundance on the 
sycamore, ash, oak, beech, walnut, etc., often infesting a large 
Part of the trunk and emerging in brilliantly colored sporophores 
from wounds made in pruning or other openings into the heart- 
Wood. These sporophores sometimes measure a foot and a half 
in diameter and are clothed above with a dense coat of long red- 
dish hairs which become black with age. The hymenium is at 
first white but soon becomes yellow, yielding a yellow dye when 
treated with water. 
In Sweden, this species is rare and occurs only on ash. It is 
also rare in the northern United States, but is somewhat more 
-‘ommon farther south ; although it is by no means so abundant 
lere as in Europe. Its principal host in America is the oak. A 
year or two ago I collected seven large sporophores on a decayed 
Spot in a living oak trunk at Fort Lee, New Jersey. This was 
in September and the fruit-bodies were already much decayed. 
Plants collected by Lea on hickory in Ohio in the latter part of 
August, 1 844, were so advanced as to seem new to Berkeley, who 
- Ramed them Polyporus endocrocinus, remarking that the species was 
