34 NORTH AMERICAN FLORA [VoLUME 9 
12. Tyromyces semisupinus (Berk. & Curt.) Murrill. 
Polyporus semisupinus Berk. & Curt. Grevillea 1. 50. 1872. 
Polyporus pachycheiles Ellis & Ev, Proc. Acad. Phila. 1894: 322. 1894. (Type from Newfield, 
New Jersey.) 
Pileus imbricate-cespitose, thin, rigid when dry, flabelliform, narrowly attached, some- 
times with a short process resembling a stipe, 0.5-1 < 0.5-0.8 & 0.05-0.1 cm.; surface white 
to flavous, partially dull-latericeous, cartilaginous, glabrous or ornamented with a few ab- 
normal hydnoid processes, subzonate; margin very thin, lobed, inflexed when dry: con- 
text very thin, white, horny and fragile when dry; tubes short, minute, white, 2-3 mm. 
long, mouths angular, 4 to a mm., edges thin, dentate: spores smooth, hyaline. 
TYPE LOCALITY: New England. 
HaBiItaT: Dead fallen trunks of maple, alder, and other deciduous trees. 
DISTRIBUTION: New England and New Jersey. 
13. Tyromyces undosus (Peck) Murrill. 
Polyporus undosus Peck, Ann. Rep. N. Y. State Mus. 34: 42. 1881. 
Pileus effused, narrowly reflexed, thin, fleshy-fibrous, soft when fresh, rigid when 
dry, 5-8 cm. broad, 2-3 mm. thick, the reflexed portion 0-7 mm. wide; surface slightly 
spongy-tomentose, sulcate-zonate, white; margin very thin, undulate, inflexed when dry: 
context white, very thin, fleshy-fibrous to fragile; tubes 1-3 mm. long, white, mouths 
large, irregular, angular, 1-2 toa mm., edges very thin, fragile, lacerate, white to slightly 
yellowish : spores smooth, hyaline. 
TYPE LOCALITY : Catskill Mountains, New York. 
HaBitaT: On decaying trunks of hemlock and pine; rarely on deciduous wood. 
DISTRIBUTION : Maine, New York, and West Virginia. 
14. Tyromyces crispellus (Peck) Murrill. 
Polyporus crispelius Peck, Ann. Rep. N. Y. State Mus. 38: 91. 1885. 
Pileus thin, laterally elongate, fleshy to somewhat fragile, sessile, dimidiate, decur- 
rent, 1.5-2.5 cm. long, extending laterally 2-10 cm., 24 mm. thick; surface radiate- 
rugose, subglabrous, whitish, varied with isabelline to fulvous zones; margin undulate or 
subcrispate, irregular, acute, inflexed when dry: context white, less than 1 mm. thick, 
hymenium uneven, somewhat cribrose; tubes 1.5-2.5 mm. long, white to discolored within, 
mouths angular, irregular, 3-5 to a mm., edges white to slightly discolored, dentate to 
sharply lacerate: spores not examined. 
TYPE LOCALITY: Osceola, New York. 
HABITAT: Prostrate trunks of hemlock. 
DISTRIBUTION : Known only from the type locality. 
15. Tyromyces Ellisianus Murrill, sp. nov. 
Pileus effused-reflexed, laterally connate, imbricate, fleshy-tough to rigid, the reflexed 
portion dimidiate or laterally elongate, 1-2 2-5X0.5-1.5 cm.; surface uneven, pul- 
verulent to glabrous or slightly scabrous, white to isabelline, with narrow testaceous zones, 
sometimes azonate; margin acute or slightly obtuse, inflexed in dried specimens, white, 
entire or undulate: context rather thick, firm and somewhat fragile when dry, white, about 
5 mm. thick; tubes white to pallid or very pale-latericeous within, 3-5 mm, long, slender, 
mouths circular to slightly angular, rather even, 5 to a mm., edges thin, white to isabelline 
or pale-latericeous, entire or slightly dentate : spores globose, smooth, hyaline, 4 #4; hyphae 
8 “3; cystidia none. 
Type collected at Newfield, New Jersey, on a dead pine trunk, J. B. Ellis. 
DISTRIBUTION : Known only from the type locality. 
16. Tyromyces caesius (Schrad.) Murrill. 
Boletus caesius Schrad. Spic. Fl. Germ. 167. 1794. 
Boletus albidus Sow. Engl. Fungi f/. 226, 1799, 
Polyporus caesius Fries, Syst. Myc. 1: 56, 1821. 
Pileus dimidiate, sessile, imbricate, often narrowly attached, with a prominent umbo, 
variable in habit and size, fleshy-tough, soft, spongy when fresh, fragile when dry, 1-2 
