PHYSARUM 91 



A. & S., Cons. Fung. Tab., VI., f. 1), and by aid of recent^ discov- 

 eries in Sweden goes its own way again. Meanwhile P. sulphureum 

 Sturgis stands, a new type for P. auriscnlpium Cke., the description 

 modified to suit; the lamented pioneer-author receives honor due^ 

 and his handsome species, with its "golden graving," may now march, 

 let us hope, under appropriate banner far down the fair highway to 

 future fame! 



48. Physarum oblatum Macbr. 



Plate III., Fig. 6; Plate XIV., Figs. 3, Z a, 3 b. 



1879. Physarum ornatum Peck, Rep. N. Y. Museum, XXXI., p. 40{?). 



1893. Physarum oblatum Macbr., Bull. Lab. Nat. Hist, lovja, II., p. 384. 



1896. Craterium maydis Morg., Myx. Miam. Vail., p. 87. 



1909. Physarum maydis Torr., Flor. des Myxo., p. 193. 



1911. Physarum maydis Torr. List., Mycet., 2nd ed., p. 59. 



Sporangia gregarious, stipitate, small, bright yellow, globose or de- 

 pressed-globose, rough ; stipe reddish-brown or fuliginous, even, 

 short, slender; hypothallus scant, black, or none; columella none; 

 threads of the capillitium yellow, delicate, connecting the rather 

 dense and abundant yellow lime-granules; spore-mass brownish- 

 black, spores violaceous, minutely but distinctly spinulose, 9-11 fi. 



This species is easily recognizable by its brilliant yellow color, 

 somewhat rugose, sometimes scaly peridium, its richly calcareous 

 capillitium, also bright yellow where not weathered or faded, its 

 dark brown, translucent, non-calcareous stem. In dehiscence, the 

 base of the peridium in cup-form, sometimes persists. This circum- 

 stance, with the fact that decaying maize-stalks and leaves are a 

 favorite habitat, led Professor Morgan to its description as Crate- 

 rium maydis. But it is doubtless a physarum, occurring on habitats 

 of all sorts, from Ohio to Iowa, Colorado and Washington. Cey- 

 lon (?). 



Physaru?n ornatum Peck is doubtfully cited here, although Pro- 

 fessor Morgan thought it the same as P. oblatum. As a matter of fact 

 the original brief description, op. cit., does not suggest either P. ob- 

 latum or P. maydis; rather a form of Tilmadoche viridis. Professor 



iRobt. E. Fries, Ofvers. K. Vetens. Akad. Forh., 1899, No. 3, p. 225. 



