[Vor. 1 
148 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
FAVOLUS Fries, Elench. Fung. 1: 44. 1828. 
Plants annual, epixylous, more or less stipitate; pileus fleshy- 
tough when fresh, small or medium sized; context white, thin ; 
tubes in a single layer, the mouths angular, usually hexagonal, 
often radiating outward from the stipe and somewhat longer in 
the radial direction; spores white. 
In our species the stipe is much reduced and is usually lateral 
or at least eccentric. The genus is separated from Polyporus 
by the large favoloid pores, although some stipitate species of 
Polyporus closely approach in pore form the condition ascribed 
to this family. 
KEY TO THE SPECIES 
Plants about 2 cm. long and broad; hymenium more or less waxy or gelat- 
Е ee lI Loa 1. F. rhipidium 
Plants larger than above; hymenium not gelatinous or waxy.....2. F. canadensis 
1. Е. rhipidium Berk. Hooker’s Lond. Jour. Bot. 6:319. 
1847. 
Plants stipitate; pileus reniform, ceespitose-imbricate, 2 cm. 
long and broad, coriaceous, alutaceous to white, the cuticle 
breaking up into minute furfuraceous squamules, concentrically 
suleate; context whitish, thin; tubes short, less than 2 mm. long, 
more or less waxy and gelatinous, the mouths white, angular 
to elongate, denticulate, averaging 2-3 to а mm.; stipe lateral, 
pruinose, 6-7 mm. long. 
On dead wood. Rare. 
The above description is adapted from the original. Тһе 
species was originally described from Ohio from specimens 
collected by Lea. Morgan also probably collected it, but 
otherwise it is not known from the state. In habit and color 
it resembles Panus stypticus. 
2. Е. canadensis Klotzsch, Linnea 7:197. 1832. 
F. ohiensis Berk. & Mont. Syll. Crypt. 171. 1856. F. 
striatulus Ellis & Ev. Am. Nat. 31: 339. 1850. 
Plants stipitate, the stipe often reduced to a lateral tubercle; 
pileus dimidiate to reniform, 1-4 x 1- 8x 0.1-0.7 cm., fleshy- 
tough when fresh, rigid when dry, at first reddish brown due 
to the presence of innate fibrils of that color, later becoming 
glabrous and fading to cream color or pure white, azonate, 
