218 Mycetozoa of North America 



Distribution: Known only from the type locality. 



Illustration: Sturgis, Mycologia 9: pi. 15. 



The description is that of Dr. Sturgia in Mycologia. It is 

 possibly a weak, aberrant phase of Enteridium olivaceum, but 

 different somewhat in the inner structure and spores. 



3. Enteridium Rozeanum Wing. Proc. Acad. Nat. Sc. Phila. 

 1889: 156. 1889. 



Reticularia? Rozeana (?) Rost. Mon. App. 33. 1876. 



Reticularia splendens Morg. Jour. Cin. Soc. Nat. Hist. 15: 137. 1893. 



Enteridium splendens (Morg.) Macbr. N. A. Slime-Moulds 151. 1899. 



Plasmodium watery white changing to flesh-color. Aethalia 

 pulvinate, hemispherical, or subglobose, 5 mm. to 6 cm. diam., 

 red or umber brown, shining, usually on a white, spreading hypo- 

 thallus; cortex composed of the confluent tops of the component 

 sporangia, often smooth, sometimes rough or perforated; sporan- 

 gial walls within the aethalium perforated, forming a network of 

 broad, membranous bands, or sometimes frayed into strands and 

 slender threads as in Reticularia. Spores rusty brown, closely 

 and evenly reticulate on two thirds of the surface, the remaining 

 part faintly warted, 7-9 ^ diam. (Plate 16, fig. 11.) 



Type locality: Pennsylvania. 



Habitat: On dead wood. 



Distribution: Throughout continental North America. 



Illustration: Lister, Mycetozoa ed. 3. pi. 153, figs. e-g. 



The species is related to Reticularia Ly coper don, and similar 

 frayed strands and threads, as in that species, are often found, 

 particularly in the lower part of the aethalium. The two forms 

 also resemble each other superficially in certain phases. Doubtful 

 specimens can be distinguished by lifting a part of the cortex, and 

 if the inner, perforated bands are attached thereto, it is E. 

 Rozeanum. 



Genus 35. RETICULARIA Bulliard, Herb. Fr. pi. 326. 

 1786; Bulliard, Champ. 83. 1791. 



Aethalium composed of numerous elongate, interwoven spo- 

 rangia whose walls are partly evanescent, partly persistent, and 

 form broad expansions and strands, dividing above into delicate 

 capillitial-like threads; spores and threads rusty brown. 



A single species. 



