Trametes nivosa (Berk.) Murrill 1907

Trametes nivosa (Berk.) Murrill
Polyporus nivosus Berk. Jour. Bot. & Kew Misc. 8 : 196. 1856.
Pileus sessile, dimidiate, conchate or applanate, 2-3X3-5X1 cm,; surface smooth,
anoderm, azonate, glabrous, snow-white, pale-isabelline in dried specimens ; margin thin,
concolorous, entire: context homogeneous, soft, punky-corky, white, 5 mm. thick; tubes
2-4 mm. long, slender, white to pallid within, mouths circular, 5 to a mm., edges thin,
firm, entire, glistening, white to slightly discolored : spores smooth, hyaline.
Type locality : Panur6, Brazil. Habitat : Dead wood. ^ '
Distribution : West Indies to Brazil.

Tyromyces fulvitinctus (Berk. & Curt.) Murrill
Polyporus fulvilinctus Berk. & Curt. Jour. I^inn. Soc. 10:Sl3. 1868. Hapalopilus fulvilinctus Murrill, Bull. Torrey Club 31 : 419. 1904.
Pileus fleshy-tough, rigid and fragile when dry, sessile, dimidiate, applanate, decurrent, 3-4 cm. broad, 3-5 mm. thick ; surface tomentose, alutaceous-fulvous, becoming glabrous behind, azonate, subsulcate, margin rather thick, fertile, entire or undulate : context homogeneouSj corky-fragile, whitish to isabelline, 1-2 mm. thick ; tubes short, 2-3 mm. long, white to isabelline or avellaneous, mouths small, circular to angular, paleumbrinous in dried specimens, edges thin, obtuse, entire : spores subglobose to ovoid, smooth, hyaline, 3-4^; hyphae hyaline ; cystidia none.
Type locality : Cuba. Habitat: Dead wood. Distribution : Cuba.

Tyromyces nivosellus Murrill, sp. nov
Pileus simple, imbricate, sessile, dimidiate, semi campanul ate to ungulate, very thick behind, convex above, concave below, 3-5X6-9X2-4 cm.; surface smooth, glabrous, azonate, white or very slightly yellowish ; margin thick, usually obtuse, entire or undulate, concolorous, darker when dry : context fleshy-tough, rigid, but slightly friable when dry, milk-white, 0.5-2.5 cm. thick; tubes long and slender, about 1 cm., white to dullyellowish within, mouths regular, angular, 3 to a mm., white to isabelline or umbrinous, edges firm, rather thin, entire : spores ellipsoidal, smooth, hyaline, 3.5 X 6 m.
Type collected at the base of El Yunque, Cuba, on a royal palm trunk, March, 1903, L. M. Underwood & F. S. Earle 1114.
Distribution : Cuba and Porto Rico.

Tyromyces palmarum Murrill, sp. nov
Pileus very broad, thin, applanate, sessile, dimidiate, concave below, incurved on drying, fleshy-tough to rigid, 6-10X10-20X0.5-0.8 cm.; surface glabrous, nearly smooth, slightly rugose or tubercular, white to cremeous ; margin thin, undulate to lobed, fertile, concolorous : context white, fleshy-fibrous to rigid and somewhat fragile on drying, 3-5 mm. thick; tubes 2-^ mm. long, white to yellowish within, mouths glistening, angular, regular, 3 to a mm., white to slightly yellowish and finally avellaneous, edges thin, entire : spores globose, smooth, hyaline, 3/^ ; hyphae 5// ; cystidia none.
T5^e collected at the base of El Yunque, Cuba, on a royal palm log, March, 1903, L. M. Underwood <2f F. S. Earle 1142.
Distribution : Cuba and Jamaica.

Trametes nivosa is a fungal plant pathogen affecting pears and nectarines.