12 NORTH AMERICAN FLORA [VoLUME 9 
DOUBTFUL SPECIES 
Boletus juglandinus Schw. Schr. Nat. Ges. Leipzig 1: 99. 1822. Described from col- 
lections made by Schweinitz in North Carolina on trunks of Juglans nigra and Platanus. 
Types preserved at Philadelphia are immature, showing no spores : cystidia are absent, the 
hyphae deep-ferruginous. 
17. FOMITIPORELLA Murrill, gen. nov. 
Hymenophore resupinate, epixylous, perennial, inseparable, rigid: context thin, brown ; 
tubes brown at maturity, stratified, usually thick-walled and entire: spores globose or 
ovoid, smooth, brown; hyphae brown; cystidia rarely present. 
Type species, Portia umbrinella Bres. 
Sporophore ] cm. or more thick. 
Tubes umbrinous, whitish-stuffed, and uniformly colored throughout. 1. F. betulina. 
Tubes fulvous and not whitish- stuffed in the dlder layers, avellaneous ; 
and whitish-stuffed in the recent growth. 2. F. altocedronensts. 
Sporophore less than 1 cm. thick. : 
Margin free; cystidia present. 3. F. Demetrionis. 
Margin adnate; cystidia absent. 
Hymenium Havous to melleous when young. 
Tubes thin-walled. 
Mouths circular; spores 34 n. 4. FF. melleopora. 
Mouths angular : spores 5-6. 5, F. inermis. 
Tubes thick-walled. 6. &. Johnsoniana. 
Hymenium darker, ferruginous to umbrinous. 
Tubes indistinctly stratified. 7. Fo umbrinella. 
Tubes distinctly stratified. 
Margin thin, adnate, ferruginous-fulvous, not blackening with 
age. 8. &. Langloisiana. 
Margin thick, somewhat elevated, ferruginous when young, . 
blackening with age. 9. F. floridana, 
1. Fomitiporella betulina Murrill, sp. nov. 
Broadly effused, inseparable, rigid; margin irregular, finely tomentose and fulvous 
when young, becoming glabrous, smooth and brown or blackish with age: context very 
thin, punky, fulvous; hymenium distinctly and many times stratified, 1-3 cm. thick, plane 
or slightly convex, umbrinous, changing color and refracting the light when young and 
growing, becoming chestnut-colored with age; tubes slender, 2~3 mm. long each season, 
partly stuffed with white mycelium, mouths subcircular, 5-6 to a mm., edges thick, obtuse, 
entire : spores ovoid, smooth, fulvous, 4~5y long ; hyphae fulvous, 3-4; cystidia fulvous, 
pointed, ventricose, 10-30 # in length. 
Type collected on Boarstone Mountain, Piscataquis County, Maine, on birch trunks, September 
12-14, 1905, W. A, Murrill 2511, 
DISTRIBUTION : Maine and New Hampshire. 
2. Fomitiporella altocedronensis Murrill, sp. nov. 
Broadly effused, 1-2 cm. thick, inseparable from the matrix; margin tomentose, ferru- 
ginous, irregular, purplish-discolored in old specimens: context thin, fulvous, ferruginous ; 
hymenium convex, smooth, distinctly stratified, slightly glistening, ferruginous to fulvous 
when young, becoming fumous or dark-avellaneous with age; tubes 2-3 mm. long each 
season, fulvous in the older layers, whitish-stuffed and avellaneous in the growth of recent 
years, mouths minute, 6 toa mm., punctiform, edges very thick, entire: spores globose, 
smooth, brown, 5-6“; hyphae ferruginous, 3-4; cystidia scanty, fulvous, conical, slightly 
ventricose, 15-25 #. 
Type collected at Alto Cedro, Cuba, on a dead trunk ina low dense virgin forest, March 19-20, 
1905, #. S. Earle & WA. Murrill 542. 
DISTRIBUTION : Known only from the type locality. 
3. Fomitiporella Demetrionis Murrill, sp. nov. 
Effused, inseparable from the matrix; margin determinate, undulate, free, finely 
tomentose, ferrnginous: context rather thick, punky-fibrous, ferruginous; hymenium 
nearly plane, distinctly stratified in 2 or 3 layers, 4-7 mm. thick, fulvous when young, 
castaneous-fuliginous with age; tubes 2-4 mm. long each season, whitish-stuffed, the older 
