CRIBRARIA 219 



dark ribs, held together by a thin metallic membrane; net branching 

 irregularly from the ribs, the nodes barely expanded, reddish brown, 

 granular, the threads slender; stipe dark brown, furrowed, short, 

 0.5-1 mm. in length; spores brick-red or orange-red in mass, pale by 

 transmitted light, war ted, 5-7 (x. 



The ribbed calyculus suggests that of C. macrocarpa but the nodes 

 are not thickened as in that species, and the spores are brick-red in 

 color. 



On coniferous wood. Oregon, New Mexico; Switzerland, Poland. 



21. Cribraria purpurea Schrad. 



Nov. Gen. PI. 8. 1797. 

 PI. XIV, Figs. 359, 360. 



Sporangia gregarious, depressed-globose, large, 1 mm. or more in 

 diameter, reddish purple, erect, stipitate; stipe concolorous, furrowed, 

 about twice the diameter of the sporangium in length, with a distinct 

 hypothallus; calyculus persistent, less than half the sporangium, ob- 

 scurely ribbed, marked by concentric plications, the margin toothed; 

 net poorly differentiated, the meshes irregular in form and size, as 

 are also the flat, unthickened nodes, the threads pale, broad, free ends 

 short and not numerous; spore-mass purple; spores by transmitted 

 light pale or colorless, 5-7 /*, nearly smooth. 



Rare. Found on rotten coniferous wood in deep forests. Easily 

 recognized by its large size and uniform purple color. The purple 

 color is soluble in water and often colors the substratum. The species 

 bears a general resemblance to C. elegans, but has larger sporangia 

 and an entirely different net. Professor Brandza finds forms which 

 he regards as somewhat intermediate. The plasmodium just before 

 the formation of the fruit is scarlet. 



Maine, New York, Pennsylvania, Ontario, Colorado, Montana, 

 Washington, Oregon; Europe, Japan. 



22. Cribraria lepida Meylan 



Bull. Soc. Vaud. Sc. Nat. 56 : 326. 1927. 



Sporangia scattered, spherical, 0.25-0.5 mm. in diameter, long- 

 stipitate, erect, very dark blue; calyculus occupying one-third to 

 one-half the sporangium, marked by fine granular ribs, the margin 

 nearly straight, not perforated, the plasmodic granules very dark 

 blue, nearly black; net prominent, the meshes large, the nodes large, 

 round, thickened, crowded with black granules, connecting threads 

 rounded with a few dark granules, free ends none; hypothallus none; 



