38 THE NORTH AMERICAN SLIME-MOULDS 



the internodes delicate, short ; spore-mass black, spores viola- 

 ceous brown by transmitted light, strongly spinulose, 10-12.5 /a. 



Rare on mosses and rotting leaves. 



The original description is as follows : "P. ctzspitosum L. v. S., 

 pulcherrimum. In foliis et stipitibus Rhododendri, Bethlehem. 

 Physarum substipitatum aut saltern basi attenuata, caespitosim 

 crescens et sparsim. Csespitulis 3 linearibus ; peridiis stipatis, 

 turbinatis, ovatis, basi contracta membranula exterori luteo- 

 squamulosa aut punctato-squarrulosa. Sporidiis nigro-brunneis, 

 floccis citrinis inspersis." Synopsis N. A. Fungi, No. 2301. 



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

 we think, referred this species to Physarnm citriunni Schum. 

 On the appearance of Rostafmski's Monograph, Dr. Peck 

 (Thirty-first Annual Report N. Y., p. 55) gives a revised list of 

 the New York species of Slime-moulds, and for what he had 

 before entered as P. citrinum Schum., writes P. citrinellnm 

 Peck, without other citation or description. Under the last 

 name the species has been generally recognized in the United 

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



A very distinct and handsome species. Easily recognizable 

 at sight by its large, globose, almost sessile and yet distinctly 

 stalked sporangia. The color to the naked eye is pale ochra- 

 ceous or buff. Only under a moderate magnification do the 

 citrine tints come out. 



Maine, New York, Pennsylvania, Missouri, Iowa. 



1 6. PHYSARUM AURISCALPIUM Cooke. 



PLATE XIV., Figs. 3, 3 a, 3 b ; PLATE III., Figs. 7, 7 a. 



1877. rhysarum auriscalpinm Cooke, Myx. U. S., p. 384. 



1879. Physarum ornatum Peck, Rep. N. Y. Mns., XXXI., p. 40. 



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



1893. Physarum sulphureum Alb. and Schw., Sturgis, Bot. Gas., XV 'III., 

 p. 197. 



1898. Physarum auriscalpium Cke., Lister, Jour. Bot., XXXVI., p. 115. 



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

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



