90 THE NORTH AMERICAN SLIME-MOULDS 



Pennsylvania. Dr. Rex. 



Lister, op. cit., describes a variety, sessile, presenting plasmodio- 

 carpous fructification, from Ceylon, also from Antigua, but there are 

 some doubts as to the identity of these with American sessile and 

 plasmodiocarpous forms. Vid. Jour. Bot. XXXVI., p. 113. 



47. Physaruim auriscalpium Cooke. 



1877. Physarum auriscalpium Cooke, Myx. U. S., Am. Lye. Nat. Hist. 

 N. Y., XL, p. 384. 



1877. Physarum auriscalpium Cke., Myx. Gr. Brit., PI. 24, f. 253-4. 



1893. Physarum sulphureum (Alb. & Schw.), Sturgis, Bot. Gaz., XVIIL, 

 p. 197. 



1898. Physarum auriscalpium Cke., List., Jour. Bot., XXXVL, p. 115. 



1911. Physarum auriscalpium Cke., List., Mycetozoa, 2nd ed., Syn. excl. 



Sporangia scattered, stipitate or occasionally sub-sessile spherical, 

 .8-1 mm. high; peridium granulated, bright golden yellow; stipe, 

 when present, one-half to two-thirds the height of the sporangium, 

 blackish-brown; hypothallus, minute, thin, brown; columella absent; 

 capillitium rather dense, composed of large angular nodes, completely 

 filled with bright yellow granules of lime, and connected by very 

 short, delicate, colorless inter-nodes destitute of lime; spores globose 

 minutely verruculose, or asperate, 10.7-11.8 /u, in diameter, brownish- 

 violet by transmitted light, black in the mass. 



This is the original description, 1893, of P. sulphureum (Alb. & 

 Schw.) Sturgis; the author last named having compared certain 

 stalked New England forms with what he could find of P. sulphur- 

 eum in the herbarium of Schweinitz at Philadelphia, and having, as 

 he thought, established identity. 



Meantime Mr. Lister had been inclined to refer P. auriscalpium 

 Cke. to P. rubiginosum Fr., Alycetozoa, p. 61. 



In 1898 Professor Sturgis and Mr. Lister agreed that the New 

 England specimens, owing to color and character of stipe and some 

 other differences could not be the Schweinitzian species, but did in- 

 deed conform much better with those in London labelled P. auriscal- 

 pium Cke. 



Accordingly P. sulphureum is something else, very different, (v. 



