Part 1, 1907] POLYPORACEAE a7 
lar, even, 6 to a mm., edges thin, entire, white to pallid, becoming discolored with age: 
spores globose, smooth, hyaline, 34.54; hyphae difform, varying from 2 to 9p. 
TYPE LOCALITY: Surinam. 
HaBitTat: Water-soaked trunks of broad-leaved trees, 
DISTRIBUTION : Tropical America and Gulf States. 
ILLUSTRATION : Berk. loc. cit. pl. 10, f. 5. 
34. PORODISCULUS Murrill. 
Enslinia Fries, Summa Veg. Scand. 399. 1849. Not Azslinia Reichenb. 1827. 
Porodiscus Murrill, Bull. Torrey Club 30: 432. 1903. Not Porodiscus Grev. 1863. 
Hymenophore small, annual, tough, epixylous, erumpent from the lenticels of dead 
branches: stipe attached to the vertex of the pileus, usually curved at maturity: context 
white, fibrous, tubes cylindrical, short, one-layered, mouths constricted: spores globose, 
smooth, hyaline. 
Type species, Peziza pendula Schw. 
1. Porodisculus pendulus (Schw.) Murrill. 
Peziza pendula Schw. Schr, Nat. Ges. Leipzig 1: 92. 1822. 
Sphaeria pocula Schw. Proc. Acad. Phila. 4: 189. 1832. (Type f om New York.) 
Polyporus cupulaeformis Berk, & Curt. Grevillea 1: 38. 1872. (Type from South Carolina.) 
Porodiscus pendulus Murrill, Bull. Torrey Club 30: 433. 1903. 
Pilei gregarious, erumpent from the lenticels of dead branches. Pileus very small, 
turbinate-cup-shaped, attached at the vertex, soon decurved and pendant, 1-2 mm. broad, 
3-5 mm. long; surface anoderm, azonate, smooth, umbrinous, uniformly covered with a 
brown powder, often ashy-white with age; margin inflexed, concolorous, sterile: context 
white, fibrous, very thin; tubes very short, annual, white within, mouths circular, con- 
stricted, white, pruinose, becoming concolorous, 6-7 toa mm., edges entire: spores globose, 
smooth, hyaline, 4: stipe 2 mm. or less in length, vertically attached, gradually ex- 
panding into the pileus, which it resembles in surface and context. 
TYPE LOCALITY: North Carolina. 
HABITAT: Fallen dead twigs and branches of chestnut, oak, hickory, ash, sumac, red cedar, 
ete. 
DISTRIBUTION: Connecticut to Florida, Missouri, and Nicaragua. 
ExsiccaTI: Ellis & Ev. N. Am. Fungi 308 ; Rav. Fungi Am. 2/0; Rab.-Wint. Fungi Eur. 
3328 ; Rav. Fungi Car.1: 10; Ellis & Ev. N. Am. Fungi 2728. 
ILLUSTRATION : Jour. Linn. Soc. 20: pl. 47. 
35. HEXAGONA Pollini, Pl. Nov. 35. 1816. 
Hymenophore sfnall, annual, epixylous, flabelliform to reniform, rarely circular, stipi- 
tate, the stipe sometimes much reduced ; surface smooth or tessellate; margin thin : con- 
text thin, white, fibrous, fleshy to tough, usually fragile when dry; hymenium of radiating 
rows of large, thin-walled, hexagonal tubes, usually radially elongate: spores smooth, 
hyaline. 
Type species, Hexagona Mori Pollini. 
Tubes unequally hexagonal, the radial walls longer. 
Pileus white or nearly so. 
Surface of pileus not distinctly tomentose. 
Pileus reniform at maturity, stipe usually much reduced; 
species not tropical. 
Tubes large ; surface of pileus decorated with imbricated red- 
dish- brown fibrils, which disappear with age. 1. HY. alveolaris, 
Tubes much smaller, the mouths rarely over 1 mm. long and 
0.5 mm. broad; surface of pileus glabrous. 2. A. striatula. 
Pileus flabelliform, stipe usually very distinct, equaling the 
pileus at times in length; species tropical. 
Stipe 5-10 mm. in diameter. 
Tubes 1 mm. in length. 3. A. princeps. 
Tubes 3-6 mm. in length. 4. H. pseudoprinceps. 
Stipe 1-3 mm, in diameter. 
Pileus 3 cm. or less in diameter. 
Tubes flesh-colored, 2 mm. wide. 5. H. Maxoni, 
Tubes pallid, 1 mm. wide. 6. H. floridana. 
Pileus 4 cm. or more in diameter. 
Margin entire, often pellucid. 7. H. daedalea, 
Margin ciliate or denticulate. 
