388 The Myxomycetes of the United States. 



Genus 4. Craterium Trent. 



Sub-gen. A. Leiocraterium. 



29. Craterium vulgare Ditm., t. 9. Scliw., Am. Bor., 2305. 



Craierium pedunculatum Trent., Curtis, Cat., p. 112. 



Spores -0083— -01 mm . 



On leaves, stems, etc. Car. (Curt., Schw.). 



Sub-gen. B. Trachycraterium. 

 30. Craterium leucocephalum Pers. Ditm., t. 4. Schw., Am. Bor., 2306. 



Craterium leucostictum Fries, Sys. Myc, iii, 152. 

 Craterium pruinosum Corda, Ic, vi, f. 33. 



Spores -0083— -01 mm . 

 On bits of wood, etc. Car. (Schw., Curt.) ; N. York (Peck). 



UsTCERT^E] SEDIS. 

 31. Craterium minimum B. and Curt., in N. A. Fungi, No. 367. 

 «On dead grass, etc. Car. (Curt.). 



32. Craterium porphyrium Schw., Am. Bor., No. 2308. 

 On rotten wood. Bethlehem (Schwz.). 



Genus 5. Crateriachea R. 



The only species, Crateriachea mutabilis R., is not re- 

 corded in the United States, unless Craterium obovatum 

 Peck, proves to belong to this genus, which it is too imper- 

 fectly described to determine. 



Genus 6. TihnadocJie Fr. 



33. TlLMADOCHE NUTANS (PerS.). 



Physarum nutans Pers., Syn., 171. Schw., Am. Bor., 2277. 

 Physarum bulbiforme Schum., Saell., 1432. Fl. Dau., t. 1974, f. 3. 

 Tilmadoche cernua Fr., S. V. S., 451. 

 Physarum connatum Ditm., in Sturn, t. 41. 

 Didymium polycephalum B. and Curt., MSS. 



Spores -009— •01 min . 

 On wood and leaves. Car. (Schw., Curt.) ; Penn. (Schwz.). Boston 

 .(Farlow); Conn. (Wright). 



