[Vor. 1 
134 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Growing only on living trunks of Robinia. Common. 
The type locality for F. rimosus is given by Berkeley as the 
Swan River, Australia, and not Demerara and the Cape of 
Good Hope, as cited by Saccardo and by Murrill. If the speci- 
mens Murrill examined are from the two latter places, it is still 
possible that our plants belong under F. rimosus. Our species 
also oecurs in South Africa as specimens examined from that 
locality agree well with our plants. 
The plant is never found on any other host than the locust 
tree. This will distinguish it from all of its allies. Its closest 
relatives appear to be F. Everhartii Ellis & Gall. and F. igniarius 
L. ex Gill. The plant is well illustrated by Hard (Mushrooms 
f. 347), and by von Schrenk (Ann. Rept. Mo. Bot. Gard. 12: pl. 2). 
12. Е. Everhartii Ellis & Gall. 
Mucronoporus Everhartii Ellis & Gall. Jour. Myc. 5:141. 
1889. 
Plants perennial, sessile or decurrent; pileus dimidiate, convex, 
rarely ungulate, 2.5-10 x 4-20 x 2-6 cm., woody, entirely 
fulvous when young but becoming grayish brown or black 
and rough and rimose with age, velvety when young, glabrous 
when mature, scarcely encrusted, concentrically suleate with 
age, margin thin or thick, acute or obtuse, usually remaining 
fulvous in color; context fulvous to rusty brown, shining (at 
least in herbarium specimens), zonate, woody, 1-4 cm. thick; 
tubes 3-6 mm. long, indistinctly stratified, tubes of the older 
layers sometimes partly stuffed with mycelium, the mouths con- 
colorous with the context, circular, averaging 4-5 to а mm., 
the walls rather thin but entire, sometimes glistening; spores 
distinctly brown, smooth, globose, 4-5.3ш in diameter. 
On living trees, usually of Quercus. Not uncommon. 
Distinguished from F. igniarius L. ex Gill. and F. nigricans 
Fries ex Gill. by the absence of the distinct encrustation or 
stuffing of the tubes in the old layers, by the more shining 
context, the somewhat thinner dissepiments, the hyaline spores, 
and the absence of a distinct crust on the pileus. The two 
1 Р. Everhartii was originally described under the genus Mucronoporus and as 
far as I have been able to find, no specific statement of transfer to the genus Fomes 
was ever made. At the present time I have not been able to satisfy myself as to 
who was the first to make (unknowingly, it seems) the new combination, and there- 
fore I do not know to whom credit for the transfer should be given. 
