194 Mycetozoa of North America 



cylindrical, the length of the sporangium or more, rugose, black. 

 Spores yellowish, minutely warted, 5-8 ^ diam. 



Type locality: Germany. 



Habitat: On dead coniferous wood. 



Distribution: *Montana, *Ohio, Ontario, Oregon, Pennsyl- 

 vania, *Prince Edward Island, *Washington, 



Illustration: Lister, Mycetozoa ed. 3. pi. 140, figs. a~c. 



This species is distinguished by the usually firm and large 

 meshes of the net and the reddish orange color. Its nearest 

 neighbor is C. minutissima, but there is little comparison because 

 of the minute size of the latter. 



7. Cribraria minutissima Schw. Trans. Am. Phil. Soc. II. 4: 260. 



1832. 



Cribraria minima Berk. & Curt.; Berk. Grevillea 2: 67. 1873. 

 Cribraria microscopica Berk. & Curt.; Berk. Grevillea 2: 67. 1873. 

 Cribraria oregana Gilb.; Peck & Gilb. Am. Jour. Bot. 19: 142. 1932. (N. Y. 

 B. G, no. 7127, type material.) 



Plasmodium blackish blue (Lister). Total height 0.5 to 0.7 

 mm. Sporangia stalked, gregarious, globose, erect or inclined, 

 0.1 to 0.3 mm. diam., nut-brown; cup entirely wanting, or even 

 at the margin and about half the height of the sporangium, or 

 still higher and constricted below the rim, faintly striate longitu- 

 dinally with lines of plasmodic granules about 1 /x diam, ; nodes of 

 the net not expanded, or narrow and flattened, connected by 

 three to five slender threads. Stalk filiform, two to four times 

 the height of the sporangium, brown. Spores ochraceous, mi- 

 nutely spinulose, or warted, 5-7 n diam. 



Type locality: North Carolina. 



Habitat: On dead coniferous wood. 



Distribution: Colorado, Indiana, *Iowa, Massachusetts, 

 *Missouri, New Jersey, New York, North Carolina, Oregon, 

 Pennsylvania, *South Carolina, *South Dakota, *Washington. 



Illustration: Lister, Mycetozoa ed. 3. pi. 140, figs. d-h. 



This minute species is usually found in the early months of 

 the season when the more common Cribrarias appear in abun- 

 dance. It is subject to considerable variation in the size and 

 shape of the cup, and the nodes of the net are sometimes enlarged 

 more prominently. The species compares in size with several 

 other minute forms of Cribraria, but is readily recognized by 

 sharp and clear characters. C. oregana is an abnormal form of 



