[Vor. 1 
106 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
lous-tomentose, soft to the touch, azonate, margin thin and acute 
or thiek and obtuse; context white or whitish, with a firm corky 
layer next to the hymenium and a lighter colored, softer layer 
above, the whole 0.2-1 em. thick; tubes in well developed speci- 
mens 1-6 mm. long, whitish or rufescent when bruised, mouths 
angular to dedaloid and irregular, averaging 1-3 to a mm.; 
stipe central, lateral, or wanting, rarely well developed and up to 
6 cm. long, more often rudimentary and tubercular, clothed 
like the pileus, soft on the outside and firm within; spores 
white, smooth, subglobose, 5.5-8.5 и in diameter; conidial (?) 
spores sometimes present, white, smooth, ovoid to elliptical, 
3.34.2 x 5.2-7.8 и. 
Usually growing about stumps and probably always attached 
to buried wood. Common. 
Well developed specimens of this plant will be easily recog- 
nized by the duplex context and the soft, villous pileus; abnor- 
mal specimens by their distorted appearance. The duplex 
context is always more easily recognized in dried specimens. 
According to Lloyd our plant is identical with P. rufescens Fries 
of Europe. See Lloyd, Syn. Stip. Polyp. f. 458., for illustration 
of one form of the distorted plant. 
29. P. pocula Schw. ex Berk. & Curt. Proc. Am. Acad. Arts 
Sci. 4:122. 1858. 
Sphaeria pocula Schw. Jour. Acad. Nat. Sci. Phil. 5:7. 1825. 
Enslinia pocula Schw. ex Fries, Summ. Veg. Scand. 2:399. 
1849. | 
Pileus short-stipitate, pendant from dead branches, cireular 
in outline, 1-5 mm. in diameter, 1-3 mm. thick, coriaceous when 
fresh, rigid when dry, whitish to brown in color, pruinose or 
mealy, azonate; context coriaceous when fresh, hard when dry, 
less than 1 mm. thick; tubes not more than 0.5 mm. long, 
mouths at first appearing pruinose, whitish or brownish, cir- 
cular, very minute, averaging 5-6 to a mm.; stipe dorsally 
attached, concolorous with and expanding into the pileus, prui- 
nose, not more than 5 mm. long; spores (teste Murrill) globose, 
smooth, hyaline, 4 u in diameter. 
On dead branches, especially of Quercus and Castanea. Rare. 
This is the smallest known polypore and easily identified by 
its size and habit of growth. It was first decribed as an asco- 
