(334) 



specimen seems to be entirely typical of the genus. The 

 description as given above agrees closely with the next fol- 

 lowing species but the substrata are very different and there 

 are other differences hard to define exactly. 



4. Periconia nigriceps (Peck) Sacc. Syll. 4: 274. 1886. 

 Sporocybe nigriceps Peck, Reg. Rep. 34: 49. 1883. 



Blackening the substratum ; conidiophores gregarious, 

 erect, smooth, shining, septate, sometimes with one or two 

 short thick branches near the top, not exceeding 500 ft; ca- 

 pitulum globose or elliptical ; conidia brownish, globose, 

 minutely roughened, 6-8 fi. 



On dead stems of sedges and grasses. New York. I also 

 refer here somewhat doubtfully Common's no. 2361 on Scir- 

 pus lacustris, from Delaware, Langlois, no. 919 on Spar- 

 tina poly st achy a from Louisiana, and two specimens on corn 

 stalks collected in New Jersey by Mr. Ellis. 



5. Periconia epiphylla Schw. Trans. Am. Phil. Soc. 

 (Syn. Fung. Amer.), 4: 304. 1834. 



Sporocybe epiphylla Sacc. Syll. 4: 608. 1886. 



Not blackening the substratum ; conidiophores scattered, 

 nearly cylindrical or slightly tapering upward, often flexed, 

 2-4-septate, brown, 400-500 x 14 /i; capitulum nearly spher- 

 ical, about 40 ti\ conidia globose, brown, echinulate, about 

 10-14 /i. 



On more or less definite areas on dead leaves. I refer here 

 a specimen on leaf-miner spots on Smiiax, from New Jersey 

 (Ellis), and on Ailanthus leaves, locality and collector not 

 stated. 



The taking up of von Schweinitz's name for this species is 

 perhaps hardly warranted by his description which is as 

 follows : 



" 3°47- P- epiphylla L.v.S., in variis foliis dejectis obser- 

 vata, Bethl. P. sparsa, pluribus tamen approximatis. Sporo- 

 dochio breviusculo, superne attenuate, nigro. Capitulo pro 

 ratione magno, fusco, globose Sporidiis nigris, densein 

 inspersis." 



