420 MurRILL: POLYPORACEAE OF NorTH AMERICA 
PYCNOPORUS Karst. Rev. Myc. 3: 18. 1881 
This genus was founded upon a single species, Pycuoporus cin- 
nabarinus (Jacq.), and characterized by its author as follows: 
‘“Pileus suberosus, intus floccosus. Pori sat firmi.’”’ In North 
America there are two species of the genus, both of them very 
attractive, abundant and well known. One occurs chiefly in tem- 
perate regions and the other is extremely common in the tropics. 
In the southern United States the two approach quite near each 
other in some of their forms so that it is not easy to distiuguish 
them. 
Synopsis of the North American species 
Pileus thick smooth, opaque; plant abundant in temperate regions. 
1. £. cinnabarinus, 
Pileus thin, often zonate, brilliant red; plant abundant in the tropics. 
2. P. sanguineus. 
I. PYCNOPORUS CINNABARINUS (Jacq.) Karst. Rev. Myc. 
Ai 1G: 1881 
Boletus cinnabarinus Jacq. F\. Austr. 4: 2. pl. 304. 1776. 
Boletus coccineus Bull. Herb. France, 364. pl. sor. fir. 1791. 
Polyporus cinnabarinus Fr. Syst. Myc. 1: 371. 1821. 
Trametes cinnabarina Fr. Nov. Symb. 98. 1851. 
_ This species was known for some time in Europe before re- 
ceiving the name assigned to it by Jacquin. The type specimens 
were sent from Carinthia by Wulfen, and Jacquin states that it is 
parasitic on trees in subalpine districts of Austria. It is now 
known to occur on various deciduous trees in Europe, Asia and 
North America. Bulliard’s fine figures were made from plants 
growing on cultivated cherry. Fries assigned it to his new genus 
Trametes in 1851 and Saccardo has listed it under two genera in 
his Sylloge. Its nearest ally is P. sanguineus, a tropical species, 
from which it differs in being thicker, more opaque in color, ano- 
derm, and in having larger tubes with thicker dissepiments. There 
is also no zonate form of P. cinnabarinus. 
The sporophores appear in this latitude in the latter part of 
June and mature quickly. In the earlier stages they are very 
soft, spongy and elastic, light orange in color and clothed with 
numerous slender delicate hairs which give them a pruinose ap- 
pearance. Later the hairs disappear, the color becomes darker 
