MurRILL: POLYPORACEAE OF NorRTH AMERICA 423 
This genus is based upon Boletus pavonius Hook. (Kunth, 
Syn. Pl. r: 10. 1822), described from Colombia. Its nearest ally 
is the old-world genus Cyclomyces, erected by Fries in 1830 upon 
Cyclomyces fuscus. In this latter genus the tubes are continuous 
concentric furrows, while in the species of Cyclomycetella which 
come nearest to Cyclomyces the concentric appearance of the 
hymenium is caused by the partial splitting of the radial walls in 
age; and the formation of furrows is by no means constant. 
Cyclomycetella pavonia (Hook.). 
Boletus pavonius Hook. in Kunth, Syn. Pl. r: 10. 1822. 
Polyporus pavonius Fr. Epicr. 477. 1836-1838. 
Polyporus todinus Mont. Ann. Sci. Nat. II. Bot. 16: 108. 1841. 
The type plants of Hooker’s species were collected by Hum- 
boldt in Colombia, or New Granada as it was then called, and 
named for U/va pavonia because of the concentric lines of the 
pileus. Montagne’s types were from Guiana, collected by Lepri- 
eur. He first thought that these plants were P. striatus (Hook.), 
but later placed them midway between this species and P. tada- 
cinus Mont., making no mention of Hooker’s other species, /. 
pavonius, described just before. 
Other closely related species are found in South America. J. 
striatus Hook. (Kunth, Syn. Pl. 1: II. 1822), was described from 
plants collected by Humboldt in Peru, and has since been found 
in Venezuela. P. vespilloneus Berk. (Hook. Jour. 8: 1856) was 
described from Juan Fernandez Island and later reported by Mon- 
tagne from Chile. All these species show very recent common 
origin. P. Hasskarlii, a Ceylon species, has several times been 
erroneously reported from Cuba. 
Cycloporus gen. nov. 
Hymenophore annual, tough, anoderm, terrestrial, orbicular, 
centrally stipitate ; context soft, spongy, ferruginous ; pores at first 
polygonal, soon becoming continuous concentric furrows, dissepi- 
ments thin, lamelloid; spores ovoid, smooth, ferruginous. 
The type of this genus is Cyclomyces Greenet Berk. (Lond. 
Journ. Bot. 4: 306. p/. rz. 1845), a very rare plant found in 
temperate regions of North America.’ The genus Cycloporus dif- 
fers widely from Cyc/omyces in being terrestrial and stipitate instead 
of epixylous and sessile. 
