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126 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
SPECIES DOUBTFUL OR EXCLUDED 
The following species reported by either Morgan or Lea are 
now believed to have been misdetermined, but the writer does 
not know to what species the plants should be referred: P. 
ovinus Schaeff. ex Fries; P. leucomelas Pers. ex Fries; P. lentus 
Berk.; P. fragilis Fries; and P. badius Schw. 
P. intybaceus Fries reported by Morgan is possibly а form of 
P. giganteus, P. frondosus, or a closely related species. 
P. pheoxanthus Berk. was originally described from material 
collected in Ohio by Sullivant. Тһе type specimen is said to 
be in fragments and the plant has never been collected since 
Sullivant's time. 
FOMES Fries, ex Gill. 
Champ. Fr. 682. 1878. Fries; Nov. Symb. 31. 1851. 
Plants typically perennial, epixylous, sessile (in our species) ; 
pileus corky or more often woody in texture, often becoming 
rimose, anoderm, or encrusted; context white, reddish, or brown- 
ish, soft and punky to hard and woody; tubes as in Polyporus 
except that they are arranged in definite or indefinite layers 
corresponding to periods of growth of the plant, the mouths 
circular or angular, never deedaloid or irpiciform; spores white 
or brown. 
The genus Fomes includes all of the perennial forms which 
have the tubes as in the genus Polyporus. Each season one 
layer of tubes is produced and plants of the first season’s growth 
are likely to be referred to the genus Polyporus. The key to that 
genus has been made to include a few such forms, the descrip- 
tions of which are always to be sought in the genus Fomes. A 
few species are so constantly annual iliduration that they might 
perhaps better be included in the genus Polyporus. 
KEY TO THE SPECIES 
Context white or only slightly colored (Species with wood-colored, flesh-colored, 
or rose-colored context included һете)............................... 1 
Context yellowish brown or 4атКег................................... 7 
1. Sporophore small, scarcely more than 2 cm. broad; context white.......... 2 
1. Sporophore larger, more than 2 cm. broad; context whitish or somewhat 
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