58 Mycetozoa of North America 



34. Physarum javanicum Racib. Hedwigia 37: 53. 1898. 



Physarum discoidale Macbr. N. A. Slime-Moulds ed. 2. 74. 1922. (N. Y. 

 B. G. no. 7701, type material?) 



Plasmodium? Sporangia scattered, orbicular, flattened, con- 

 vex, or obconical below, concave or umbilicate above, 0.6 to 0.8 

 mm. diam., 0.25 mm. thick, stalked, grayish white; sporangial 

 wall membranous, with evenly distributed or clustered lime- 

 granules, fragile and fugacious, often dehiscing by spreading lobes. 

 Stalk subulate, slender, flexuose, 1.5 to 1.8 mm. high, white or 

 pale straw-colored above, darker from included refuse matter 

 below. Capillitium a lax network of slender threads with long, 

 fusiform and branching, white lime-knots, or almost Badhamia- 

 like, and consisting of a network of branching tubes filled with 

 lime-granules and attached to the sporangial wall by straight, 

 hyaline threads. Spores brownish or gra\ish lilac, nearly smooth, 

 9-10 ft diam. 



Type locality: Java. 



Habitat: On dead wood, twigs, and grasses. 



Distribution: *California, Florida, Puerto Rico. 



Illustration: Lister, Mycetozoa ed. 3. pi. 197 . 



This species resembles P. pezizoideum , but in the latter species 

 the stalks are dark red. The description and figures of P. 

 discoidale, from California, indicate this may be a form of P. ja- 

 vanicum, and an authentic specimen discloses nothing otherwise, 

 except that the stalks are somewhat shorter than usual. 



35. Physarum crateriforme Petch, Ann. R. Card. Perad. 4: 304. 

 1909. 



Plasmodium dull ochraceous (Lister). Sporangia scattered or 

 in groups, cylindrical, obovoid, spherical, or reniform, sometimes 

 depressed, stalked, with occasional plasmodiocarp forms, grayish 

 white, rarely pale brown; sporangial wall membranous, with clus- 

 tered deposits of white lime-granules. Stalk conical, black or 

 black below and white above, opaque from included refuse matter, 

 0.1 to 0.7 mm. long. Columella variable in color and shape, 

 white, yellowish brown, or black, cylindrical, and reaching to the 

 apex of the sporangium, or ending below it and then clavate or 

 shortly conical, sometimes absent. Lime-knots white or pale 

 brown, either united to form a massive columella giving off hori- 

 zontal, spike-like points which end in simple or forked hyaline 



