MorrILL: PoOLYPORACEAE OF NoRTH AMERICA 41 
duced by an abundance of nutritious food such as is not supplied 
to the common species growing on dead wood. Large size, very 
rapid growth, ample pores and a somewhat softer context are 
probably connected with a better food supply and a more vigorous 
mycelium. 
In addition to Polyporus, the present species has served as the 
nomenclatorial type of two recent genera, 7. ¢., Cerioporus Quél. 
(Ench. Fung. 167. 1886) and Melanopus Pat. (Hymenom. Eur. 
137. 1887). 
21. Polyporus maculosus sp. nov. 
A small tough plant nearly related to P. fissus, but minutely 
tomentose, with rounded nearly glabrous spots of a reddish-brown 
color. Pileus irregularly orbicular, deeply depressed, 3-3.5 x O.1- 
0.2 cm., surface finely and densely tomentose, radiately striate, 
drab-colored, ornamented with several light-bay or chestnut spots 
mostly situated about midway between the center and the margin, 
which is very thin, striate, irregular and somewhat fissured but 
entirely devoid of teeth or cilia: context 0.5-1.5 mm. thick, 
tough to corky, pallid; tubes 0.2-0.4 mm. long, 6-7 toa mm., 
decurrent, pallid or yellowish, subcylindrical, edges entire ; ‘spores 
ovoid, hyaline, smooth, 3 x 4, immature in these specimens : 
Stipe central, solid, woody, tapering upward, chestnut-black at the 
base with blotches of light-yellow, uneven, subglabrous, 2 cm. 
long, 2~4 mm. thick. 
This plant was collected in Central America by C. L. Smith. 
The hymenium is not quite mature, but the other characters are 
well marked. The peculiar reddish spots seem to be caused by 
the disappearance of the thick tomentum at certain points. The 
Species occurs on wood and has the habit of representative plants 
of this genus. 
22. PoLyYpoRUS ELEGANS (Bull.) Fr. 
Boletus elegans Bull. Herb. France, p/. 46. 1780. 
Boletus nummularius Bull. Herb. France, p/. 724. 1782. 
Folyporus elegans Fr. Epicr. 440. 1836-1838. Pat. ‘Tab. 
Fung. 137. 1883-1886. 
Abundant throughout Europe and North America on decay- 
ing branches and trunks of various trees. Being exceedingly vari- 
able in form, it is not strange that in Europe it is confused with 
its variable near relative, Polyporus Calceolus (Soletus Calccolus 
