PHYSARUM 33 



Diderma, but with a Craterium, Lister, or Physamm, Massee. 

 There seems no reason why we should not respect the decision 

 of Massee, whose description is here quoted in form somewhat 

 abridged. 



San Francisco, Cal. 



8. PHYSARUM LATERITIUM (Berk, and Br.} Rost. 



1873. Didymium lateritium, Berk, and Rav., Grev., II., p. 65. 



1875. PJiysarum ditmari lateritium Rost., Mon. App., p. 9. 



1879. PJiysarum inequale Peck, Rep. N. Y. Aftes.,XXXl., p. 40. 



1892. Physarum cJirysotricJium B. and C., Massee, Mon., p. 300. 



1894. PJiysarum inequale Peck, Lister, Mycetozoa, p. 60. 



1896. PJiysarum lateritium Berk, and Br., Morgan, Jour. Cin. Soc., p. 95. 



Sporangia gregarious, sessile, globose or sub-globose, or some- 

 times plasmodiocarpous, yellowish or orange, everywhere when 

 fresh spotted with minute scarlet granules ; the peridium thin, 

 more or less rugulose ; columella none ; capillitium delicate, gen- 

 erally yellow, with nodules conspicuous, yellow or reddish ; 

 spores violet brown in mass, by transmitted light pale violet, 

 minutely roughened, 7-9 p. 



A well-marked species easily recognized by the characters 

 cited. The extent of lime deposit at the capillitial nodes varies ; 

 sometimes very little. This accounts for Berkeley's generic 

 reference. On the other hand, Lister makes the rounded lime 

 knots " each knot with a red centre surrounded by yellow round 

 lime granules " diagnostic. This pied condition does not come 

 out in any of our specimens. The capillitium in broken speci- 

 mens soon fades, tends to white, etc. 



New York, Pennsylvania, Ohio, and south. 



9. PHYSARUM VIRESCENS Ditmar. 



PLATE VIII., Figs. 7, 7 a ; PLATE IX., Figs. 5, 5 a, 5 b. 



1817. PJiysarum virescens Ditmar, Sturm, DeutscJi. Flo., Pihe, I., p. 123, 

 pi. 61. 



1875. PJiysarum ditmari Rost., Mon. App., p. 8. 



1892. PJiysarum ditmari Rost., Macbride, Bull. Lab. Nat. Hist. la., II., 

 p. 155. 



D 



