MurRRILL: POLYPORACEAE OF NORTH AMERICA 35 
The stipe is long and slender, centrally attached and somewhat 
hairy at the base. The pileus is umbilicate with involute margin 
resembling a minute species of Omphalia in shape. In general 
appearance the plant resembles P. 7richoloma, but the margin is 
without cilia and the pores are alveolar. 
10. PoLyporus piscoipEus B. & C. Jour. Linn. Soc. 10: 
303. 1868 
This species was collected by Wright in Cuba. It is rather 
larger than most of the members of the genus, but resembles 
them closely in habit and structure. Its nearest ally is perhaps 
P. virgatus. Being large, it is rather fleshy, the context becoming 
soft, corky and elastic when dry. The tubes are rather large, at 
length sinuose, and become collapsed on drying, indicating a soft 
condition when fresh. 
11. POLYPORUS PHAEOXANTHUS B. & Mont. Sylloge Crypt. 
154. 1856 
This rare species was collected at Columbus, Ohio, by Sulli- 
vant. It grew on fallen oak wood. The type at Paris is in frag- 
ments, but these are well preserved. The character by which the 
species is at once recognized is the deep yellow color of the con- 
text. The pileus is convex, reddish-brown, glabrous, scarcely a 
millimeter thick and about two centimeters broad ; the stipe cen- 
tral and concolorous, the tubes minute and remote from the stipe. 
12. Po_typorus CoLtumBiensis Berk. Lond. Jour. Bot. 1: 
bike ABA ih, 
This is one of the thinnest species of the family, resembling a 
brown cuticle stripped from some fruit having a smooth, waxy, 
polished coat. It is orbicular in shape with a dark central stipe 
and small decurrent tubes. The type was sent to Berkeley from 
the Columbia River region of South Carolina. There is also in 
the Berkeley herbarium a specimen from Chicalahi, Mexico, bear- 
ing the same name, which may be the same species. 
13. PoLyporus oBpoLus Ell. & Macbr. Bull. Iowa Univ. Lab. 
Nat. Hist. 4: 68. 1896 
A small plant with very thin partially translucent pileus, brown 
central stipe and exceedingly minute pores. Pileus orbicular, 
