PHYSARUM.] PHYSARACB^. 63 



binato-ovate, with yellow scales. Oapillitium yellow. Spores 

 blackish-brown. 



Hah. On leaves and stalks of rhododendron.^Bethlehem, N. 

 America. 



This description would apply to P. virescens Ditm. ' 



38. P. Schroeteri Eost., Mon., p. 419. Sporangia stipitate, 

 hemispherical, flattened, greenish-grey. Stalk thick, conical, dull 

 yellow or golden, shining, continued into a distinct obtuse conical 

 columella. Capillitium of delicate threads, formiiig a dense net- 

 work provided with lime-knots. Spores violet, delicately spinulose, 

 10 to 11 ^ diam. 



Hub. Otterdorf, near Kastatt ; Dr. Schroeter. 

 This description points to a form of P. citrinum. 



39. P. Famintzini Rost., Mon., p. 107. Sporangia sessile, minute, 

 crowded, sometimes confluent, dull chestnut, irregularly hemi- 



^spherical, dehiscing at the apex. Columella none. CapUhtium 

 elastic, elongated after dehiscence ; the greater part of the knots 

 not developed, a few containing milky yellow lime-granules. 

 Spores pale violet, smooth, 10 |u, diam. 

 Sab. On twigs in Poland. 



40. P. capense Eost., Men., p. 113, fig. 92. Sporangia irre- 

 gularly hemispherical or turbinate, sessile, simple, or more often 

 collected in small clusters on a copious hypothallus, greyish-white, 

 wrinkled. Columella none. Capillitium abundant, with few 

 more or less rectangular lime-knots with very long connecting 

 hyaline threads. Spores pale violet, smooth, 11 to 14 /* diam. 



ITab. On branches. — Cape of Good Hope. Specimen in the Leipsio 

 Museum. 



The figure and description apply to a form of P. cinereum. 



41. P. Braunianum de Bary, in Eost., Mon., p. 105. Plas- 

 modium yellow ; sporangia irregularly globose, small, sessile, 

 simple, or collected in Uttle heaps, brown, 6 '5 mm. diam., dull 

 or shining above ; sporangium-wall yellowish brown above, dull 

 brown towards the base. Columella none. Capillitium well 

 developed, with small rounded-angular brown lime-knots weakly 

 developed. Spores violet, smooth, 10-7 jw, diam. 



Hab. Grundewald, near Berlin. — A. Braun. 



The nearest allies of this species seem to be P. murinum and P. 

 virescens var. obscurum. 



42. P. ornatum Peck, in Rep. N. York Mus., xxxi., p. 40. 

 Sporangia depressed or hemispherical, plane or slightly concave 

 beneath, greenish-cinereous, dotted with small yellow granules, 

 the empty walls whitish. Stem short, black or blackish-brown, 

 generally longitudinally wrinkled when dry. Columella none. 

 Capillitium with numerous yellow knot-like thickenings. Spores 

 globose, smooth, violet-brown in the mass, about 10 to 11 a diam. 



Hab. Decaying wood. — Albany, U.S.A. 



This description applies to the pale form of P. viride Pers. 



