70 NOTICES OF NORTH AMERICAN FUNGI. 



tinctly porous as soon as the hymenium is formed. This is quite 

 different from the last, though difficult of definition ; the walls of the 

 pores are not rigid as in M . ceracellus. 



~ 169. Merulius patellaeformis. B. & C— Pnsillus orbicularis 

 totus resupinatus fuscus ; hymenio poroso. No. 6361. Car. Inf. On 

 very rotten wood. 



Scarcely exceeding a line in breadth, orbicular, entirely resupi- 

 nate, brown, paler towards the margin ; hymenium porous. Very 

 minute, but quite distinct. 



* Merulius lacrymans. Fr.— No. 2168. Car. Inf. A variety 

 growing on the soil. 



We have no specimen from N. America in the normal condition. 

 «, * Merulius incrassatus. B. 8f C— Kew Gard. Misc.i. p. 234. 

 No. 1504. Car. Inf. On pine stumps. 



Effused for several inches, resupinate, with the margin shortly 

 reflexecl, dirty white, and slightly silky ; substance thick, fleshy ; 

 folds forming minute shallow brownish pores. Allied to Merulius 

 tremellosus, but thick and fleshy with minute pores. 



* Merulius brassicsefolius. Schwein.— Rav. Fung. Car. 2. 23. 



170. Merulius spissus. B.— Poris primum pallidis brevibus 

 dein fuscis elongatis e strato membranaceo oriundis. Car. Inf. Curtis. 



Resupinate several inches across, at first membranaceous with 

 shallow pale pores about -^th of an inch in diameter, then much 

 elongated and forming a dark brown mass. 



* Arrhytidia flava. B. & C— No. 1349. Car. Inf. 



Forming little, scattered, sometimes confluent patches -^in. broad, 

 consisting of a white mycelium which forms a distinct border to 

 the smooth orange-yellow hymenium ; sometimes the border is 

 double. Spores oblong, fixed obliquely at the base. 



171. Arrhytidia fulva. B. Sf C. — Pusilla horizontalis, spathu- 

 lata, fulva. No. 4739. Car. Inf. 



About 11 line long, horizontal, spathulate, abruptly narrowed be- 

 hind into a short stem ; hymenium like the pileus fulvous. 



* Porothelium fimbriatum. Fr.— No. 2349. Car. Inf. 



* Porothelium lacerum. Fr. — No. 2791. Car. Inf. On oak. 



* Porothelium Pezizoides. Schwein. — No. 3851. Car. Inf. No. 

 6108. Alabama, Peters. 



The papilla? in the latter specimen are elongated as in Solenia. 

 On Liriodendron. 



* Porothelium subtile. M-.—No. 2393. Car. Inf. On oak. 



* Porothelium Friesii. Jlont.— No. 1792. Car. Sup. On Juni- 

 perus Virginiana. 



— 172. Porothelium hynoideum. B. — Effusum niveum pulveru- 

 lentum, verrucis primum pruinosis, dein lutescentibus, demum fuscis. 

 No. 3686. Car. Inf. 



Effused, snow-white, pulverulent looking at first exactly like 



