FUSCUS. CONTEXT BROWN. 



brown, context color and glaucous pore mouths. I know no other 

 similar species with brown context that has glaucous pore mouths, 

 excepting the preceding. It is very close to Fomes minutulus as to its 

 context, color, and spores. 



B. Context Dark Brown. 



FOMES RIBIS (Fig. 594). Pileus thin, applanate, (5-8 mm. 

 thick.) Surface at first velvety, at length furrowed, uneven, with soft 

 ridges. Context cinnamon brown. Pores minute, concolorous. Setae, 

 none. Spores small, subglobose, 3 mic., colored. 



Fomes ribis is quite a frequent species both in Europe and Amer- 

 ica on the garden species of Ribis. It usually grows imbricate, near 

 the base of the plant. It occurs also on Euonymus and Lonicera in 

 Europe, never in America, to my knowledge. There are records of 

 it growing on Symphoricarpos in the United States. The Fomes on 

 Euonymus and Lonicera have distinct names in Europe, Fomes 

 Euonymi (generally spelled Evonymi in Europe) and Fomes Loni- 

 cerae. They have long been held to be the same as Fomes ribis. My 

 observations are that the forms on Euonymus are usually of a brighter 

 color than that on Ribis, but otherwise are the same. 



Pi ILLUSTRATIONS. Although a common plant, it has been rarely figured. The old figures, 

 Mora Damca, t. 1790, and Bulliard, t. 454, Fig. E, are both very inaccurate, if correctly referred. 

 : figure of Corda in Sturm's Flora, Vol. 3 t. 62, is the only good one I have noted. 



SPECIMENS. Many, Europe and United States. 

 Compare Evonymi, Langloisii, I.onicerae, versatilis. 



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