234 Mycetozoa of North America 



12. Trichia decipiens (Pers.) Macbr. N. A. Slime-Moulds 218. 

 1899. 



Arcyria decipiens Pers. Ann. Bot. Usteri 15: 35. 1795. 



Plasmodium rose-colored or white (Lister). Total height 1.5 

 to 3 mm. Sporangia stalked, rarely sessile, gregarious or crowded, 

 turbinate, 0.6 to 0.8 mm. diam., shining olive or yellowish brown; 

 sporangial wall yellow, membranous, of two layers; upper part of 

 the wall often forming a cap of thinner texture which breaks up 

 leaving a circular opening. Stalk cylindrical, furrowed, 0.1 to 

 1 mm. long, olive or dark brown, filled to the base with spore-like 

 cells. Capillitium of simple or branched, smooth, olivaceous 

 brown elaters 4.5-5.5 y. wide, marked with four or five spiral 

 bands, gradually tapering into long, slender points. Spores 

 yellowish brown in mass, either closely and often irregularly 

 reticulate, or minutely warted, 9-12 n diam. 



Type locality: Europe. 



Habitat: On dead wood. 



Distribution: Common throughout the United States and 

 Canada. 



Illustration: Lister, Mycetozoa ed. 3. pi. 158, figs. a-d. 



This species superficially resembles Hemitrichia clavata. It is 

 distinguished from T. Botrytis, its nearest neighbor, by the stalks 

 filled with spore-like cells. 



13. Trichia Botrytis (Gmel.) Pers. Neues Mag. Bot. 1: 89. 

 1794. 



Stemonitis Botrytis Gmel. Syst. Nat. 2: 1468. 1791. 



Plasmodium purple-brown (Lister). Total height 1.5 to 5 

 mm. Sporangia stalked, piriform or turbinate, free or combined 

 in small clusters, 0.6 to 0.8 mm. diam., yellowish olive, reddish 

 brown, brown, or purple, often areolate with paler lines of de- 

 hiscence; sporangial wall of two layers, the outer charged with 

 granular matter and continued into the stalk, the inner mem- 

 branous, translucent, enclosing the spores. Stalks cylindrical, 

 often adherent in clusters of two to eight, furrowed, red or pur- 

 plish brown, consisting within of spongy tissue enclosing refuse 

 matter. Capillitium of cylindrical yellowish brown elaters 4-5 fi 

 diam., sometimes branched, gradually tapering to long slender 

 points which are smooth at the tips, marked with three to five 



