MyxomycetsB, Myxomycetncese, Physarum. 798 



t. VI, f. 12. — Plasmodio?; peridiis orbiculari-discoideis v. irre- 

 gulariter elongatis et plasmodiocarpicis, 1 mm. circ. latis, saepe bre- 

 viter stipitatis et tunc supra subumbilicatis; tunica grisea, siepe 

 granulis calcareis farcta, deorsum brunnea; stipite nullo v. bre- 

 vissimo, nigro, ruguloso; capillitio albo; sporis nigro-violaceis, te- 

 nuiter verrucosis, 12-15 \i.. diam. 



Hdb. ad ligna emortua in America boreali. 

 3. Badhamia rubiginosa (Chev.) Rost. — Syll. VII, p. 334 — var. 5995 

 globosa List. ap. Torrend Myxom. p. 212. — Peridiis subglobosis, 

 leniter depressis, 0,7 mm. diam., e griseo purpurascentibus ; ca- 

 pillitio interdum parce calcifero; stipite atro-brunneo, 0,5-1 mm. 

 long. ; columella atro-brunnea, claviformi ; sporis valide verrucosis 

 v. reticulatis. 



Hdb. ad Muscos in Britannia et Hibernia. 



PHYSARUIi^ Pers. — Syll. VII p. 336, X 84, XI p. 462, XIV p.83l, 

 XVI p. 819, XVIII p. 209. 



1. Physarum variabile Eex, Proc. Philad- Acad. (1893) p. 371, Torr. 5996 

 Myx. p. 188. — Plasmodio?; peridiis totis 1 mm. alt., sparsis v. 

 aggregatis, ovoideis v. piriformibus, interdum plasmodiocarpis ses- 

 silibus V. stipitatis. 0,4-0,5 mm. lat.. rugosis, nitidulis, fiavo-oli- 

 vaceis, ochraceo-brunneis; tunica membranacea crusta calcarea fla- 

 vicante et caduca secedente, irregulariter dehiscente; stipite lon- 

 gitudine et colore vario, 0,3-0,4 mm. longo, albo v. flavido, sub- 

 inde atro-brunneo, ssepius olivaceo, granulis calcareis albis referto, 

 capillitio e filamentis reticulatis, hyalinis, axillis dilatatis. nodulos 

 calcareos albos v. flavidos conjungentibus: columella nulla v. sub- 

 nulla; sporis minute verrucosis, atro-violaceis, 9-10 a. diam, — 



var. sessile List., Journ. of Bot. (1898) tab. 385, fig. 2: peridiis 

 omnino sessilibus. 



Hdb. cum var. ad ligna emortua in America boreali et australi 

 et in Suecia. 



2. Physarum murinum Lister. Mycetozoa p. 41. t VII, f B, ed. 11, 5997 

 p. 50, t. 18, Torr. Myxom. p. 185. — Plasmodio?; peridiis glo- 

 bosis v. subglobosis, brunneo-griseolis v. murinis, sparsis v. gre- 

 gariis, rugulosis; stipite 0,5 mm. alt. v. amplius, pallide brunneo, 

 recto, subinde subfusoideo, fragili, granulis calcareis farcto; colu- 

 mella brevi, heraisph;nrica v. obtuse conica; capillitii diu persisten- 



tis floccis hyalinis, nodulos calcareos copiosos pallide brunneos v. 



