30 NORTH AMERICAN FLORA [VoLuuME 9 
TYPE LOCALITY: On pine and spruce logs in the Sierra Nevada mountains, 2400 meters, Cali- 
fornia. 
HaBitaT: Dead coniferous logs projecting from the snow. 
DISTRIBUTION: Colorado, a Peaa ds and California. 
Exsiccatr: Ellis & Ev. N. Am. Fungi 1104; Rab.-Wint. Fungi Eur. 3432. 
2. Spongiporus altocedronensis Murrill, sp. nov. 
Pileus very soft and spongy, broadly attached, decurrent, subimbricate, 0.5-1 X 1.5-3 
0.5~1 cm. ; surface white, azonate, smooth, villose; margin thick, broadly sterile: con- 
text white, very soft and spongy, radiate-fibrous, a few fibers being darker and firmer, 3-8 
mm. thick; tubes shallow, ample, white to pale reddish-brown, about 1 mm. in length, 
1-2 toamm., mouths quite irregular, angular, edges thin, uneven, dentate: spores globose, 
smooth, hyaline, 44.54; hyphae 344. 
Type collected on rotten wood at Alto Cedro, Cuba, March, 1903, ZL. M@. Underwood & F.S. 
Earle 1479. 
DISTRIBUTION : Known only from the type locality. 
26. TOMOPHAGUS Murrill, Torreya 5: 197. 1905. 
Dendrophagus Murrill, Bull. Torrey Club 32: 473. 1905. Not Dendrophagus Toumey, Bull. 
Ariz. Exp. Sta. 33: 55. 1900. 
Hymenophore very large, but of light weight, annual, epixylous, sessile, dimidiate, 
thick and pulvinate; surface pelliculose, glabrous, azonate, margin very obtuse: context 
very thick, soft and spongy throughout ; tubes small, dark-colored, thin-walled, fragile: 
spores smooth, hyaline. 
Type species, Polyporus Colossus Fries. 
1. Tomophagus Colossus (Fries) Murrill, Torreya 5: 197. 1905. 
Polyporus Colossus Fries, Nov. Symb. 56. 1851. 
Dendrophagus Colossus Murrill, Bull. Torrey Club 32: 473. 1905. 
Pileus of immense size, but of very light weight, dimidiate to reniform, sessile, convex 
above, 10-20 X 15-30 * 7-10 cm.; surface azonate, glabrous, smooth, pale-yellowish, at 
length covered with a very thin cuticle, which becomes cracked, wrinkled and pallid with 
age; margin very obtuse, rounded, concolorous: context very soft and spongy, homo- 
geneous, concentrically zonate, several centimeters thick; tubes minute, soft, white to dis- 
colored within, 2-5 mm. long, mouths angular, 3-4 toa mm., edges thin, dentate, white 
to discolored, umbrinous or fuliginous in herbarium specimens: spores globose, smooth, 
hyaline, 5-7 7; hyphae 6 uv. 
TYPE LOCALITY: On Cedrela odoraia at Puntarena, Costa Rica. 
Habitat: Stumps of Cedrela odorata, 
DISTRIBUTION: Yucatan and Costa Rica, and doubtfully reported from the island of St. John. 
27. TYROMYCES Karst. Rev. Myc. 3°: 17. 1881. 
Leptoporus Quél. Ench. Fung. 175. 1886. Not Lepfopora Raf. 1809. 
Oligoporus Bref. Unters. Gesammt. Myk. 8: 114. 1889. 
Hymenophore annual, epixylous, sessile, anoderm, azonate, glabrousor nearly so: con- 
text white, fibrous, fleshy to fleshy-tough, rigid and friable when dry ; tubes thin-walled, 
white or yellowish, mouths polygonal : spores smooth, hyaline. 
Type species, Polyporus chioneus Fries. 
Pileus large, 8 cm. or more in diameter, 
Tubes less than 5 cm. long. 
Surface of pileus marked with rounded depressed spots. 1. 7. guttulatus. 
Surface of pileus not guttulate. 
Pileus over 1 cm. thick. 2. T. palustris. 
Pileus 3-5 mm. thick. 
Tubes firm, entire. 3. 7. Palmarum. 
Tubes fragile, lacerate, 4. ZT. obductus. 
Tubes more than 5 cm. long. 
Surface of pileus very smooth. 
Pileus white or slightly yellowish, unchanging ; tubes small, entire. 
Spores globose. 5. T. Calkinsii. 
Spores ellipsoidal. 6. ZT. nivosellus 
Pileus becoming dark sordid-bay throughout on drying ; tubes 3 to . 
amm., lacerate. 7. T. Smalliz. 
