86 THE NORTH AMERICAN SLIME-MOULDS 



perfectly defined hypothallus ; capilHtium abundant, the nodes stellate- 

 angular, large, the internodes delicate, short ; spore-mass black, spores 

 violaceous-brown by transmitted light, strongly spinulose, 10-12.5 fi. 



A very distinct and handsome species. Easily recognizable at sight 

 by its large, globose, almost sessile and yet distinctly stalked sporan- 

 gia. The color to the naked eye is pale ochraceous or buff. Only 

 under a moderate magnification do the citrine tints come out. 



In the Twenty-second N. Y. Report, Dr. Peck incorrectly re- 

 ferred this species to Physarum citrinum Schum. On the appearance 

 of Rostafinski's Monograph, Dr. Peck in his revised list, /. c, writes 

 P. citrinellurn Peck, with description on p. 57, following. Under 

 the last name the species has been generally recognized in the United 

 States and distributed. N. A. F., 2490. 



In the former edition, this species was referred to P. caespitosum 

 Schw., of which the original description is as follows: "P. caespitosum 

 L. V. S., pulcherrimum. In foliis et stipitibus Rhododendri, Bethle- 

 hem. Physarum substipitatum aut saltem basi attenuata, caespitosim 

 crescens et sparsim. Caespitulis 3 linearibus; peridiis stipatis, turbi- 

 natis, ovatis, basi contracta membranula exterori luteosquamulosa aut 

 punctato-squarrulosa. Sporidiis nigro-brunneis, floccis citrinis insper- 

 sis." Synopsis N. A. Fungi, 2301. 



The type from the Schweinitz herbarium is no longer in evidence. 

 Without it, the reference cannot be sustained. 



Not uncommon in the eastern United States; reported also from 

 Japan. 



45. Physarum albescens Ellis. 



Plate XVI., Figs. 4, 4 a. 



1889. Physarum albescens Ellis in litt: not described. 



1893. Physarum auriscalpium Cke., Macbr., Bull. Lab. N. H. Iowa, No. 2, 

 p. 155, in part. 



1894. Physarum virescens van nitens List., Mycetozoa, p. 59, in part. 

 1899. Physarum virescens var. nitens List., Macbr., A'^. A. S., p. 34, in 



part. 



1899. Leocarpus fulvus Macbr., N. A. S., p. 82. 



1911. Physarum fulvum Lister, Mycet., 2nd ed., p. 60. 



1911. Physarum virescens, nitens List., Mycet., 2nd ed., p. 84, in part. 



