DECADES OF FUNGI. 235 
ARRHYTIDIA, 7. g. 
Hymenophorum a mycelio mucedineo contexto formatum marginatum, 
tectum hymenio ceraceo molli levi sine plicis. Sport oblonge. 
224. Arrhytidia flava, Berk. and Curt. Curt. No. 1349. 
Has. On dead pine branches. South Carolina. 
Forming little scattered, sometimes confluent a bend 
of an inch broad, consisting of a white mycelium, which a dis- 
tinet border to the smooth orange yellow hymenium, vind the 
border is double. Spores oblong, fixed obliquely at the base. 
This has just the habit of Psiopezia, but is without Asci. It is adis- 
wes bordered, mostly Pezizeform Merulius, destitute of folds. 
5. Hydnum pulcherrimum, Berk. and Curt. ; idiatum crassum 
obsita spongiosum carnoso-fibrosum hirsutum intus zonatum margine 
tenui; aculeis breviuseulis subulatis. Curt. No. 1648. 
Has. On decayed logs. Santee River. Mr. Ravenel. 
Pilei white, with a pale tawny tinge, subimbricated, 6 inches broad, 
3 inches long, 2 inches thick; dimidiate, somewhat lobed, carnoso- 
fibrous, of a soft spongy consistence, clothed with copious stiff down, 
which is more or less matted, sometimes as if gummed together; sub- 
stance slightly zoned. Teeth subulate, 1~2 lines long, tawny. 
This splendid species is closely allied to H. septentrionale, but is 
smaller, far less imbricated, and clothed with much stiffer hairs. The 
general structure is precisely that of Pol. hispidus. 
226. Hydnum pithyophilum, Berk. and Curt. ; resupinatum effusum, 
subieulo tenuissimo farinaceo-byssoideo ; aculeis ochraceis compressis 
apice dentato-laceris. Curt. No. i 
Has. On fallen branches of Pinus palustris, South Carolina. 
Forming confluent patches several inches in length. Subiculum ex- 
tremely thin, sometimes farinaceous, sometimes finely byssoid, white. 
Teeth ochraceous, one line long, compressed, more or less toothed or 
jagged at the apex. 
Resembling resupinate states of H. ochraceum, but differing in the 
very scanty immarginate subieulum and compressed torn aculei. The 
hymenium is in fact extremely like that of resupinate portions of 
Irpex sinuosus, where the character of the genus Irper is not well 
exhibited. 
227. H. ciliolatum, Berk. and Curt.; resupinatum orbiculare tenue 
2n2 
