214 THE MYXOMYCETES 



the spores, otherwise unknown in the genus. The nodes are similar to 

 those of C. macrocarpa, but the granules with which they are filled are 

 larger and much darker. The margin of the calyculus, with its granular 

 rays, suggests that of C. piriformis. 

 Oregon. 



12. Cribraria piriformis Sckrad. 



Nov. Gen. PI. 4, pi. 3, figs. 4, 5. 1797. 

 PI. XIV, Figs. 350, 351, 352. 



1797. Cribraria intermedia Schrad., Nov. Gen. PI. 4, pi. 1, fig. 2. 



Sporangia gregarious, small, 0.3-0.5 mm., turbinate or pyriform 

 occasionally globose, erect, purplish brown, stipitate; stipe compara 

 tively short, 0.5-0.7 mm., tapering upward, longitudinally furrowed 

 purple or brown ; calyculus very well-defined, one-third the sporangium, 

 not ribbed but marked with minute granular lines, flattened or even 

 umbilicate below, the margin denticulate, dusky brown; net simple, 

 the meshes large, triangular, with few free ends; nodes thickened, 

 slightly convex or flat, studded with dark granules; spore-mass dull 

 brown; spores by transmitted light pale ochraceous or salmon-tinted, 

 with distinct, pallid warts, 5-7 jx. 



Schrader defined this beautiful form chiefly by its shape. This, 

 though variable, is yet generally so far pyriform as to show distinct 

 contraction toward the stipe. The well-defined calyculus is narrowed 

 below and eroded or denticulate above. The cyanic tints due to the 

 presence on the calyculus of radiating lines of purplish granules about 

 one-half the size of the spores, the uniform, open net, the stipe rather 

 stout, short, and distinctly furrowed, rising often from a small hy- 

 pothallus — these are marks of this species. The net suggests C. lenella, 

 but the latter species is much smaller, has a different stem, much longer 

 and unfurrowed. The cup here is more nearly that of some form of 

 C. intricata, but is better defined, passing into the net very abruptly by 

 the simple intervention of projecting teeth. 



Var. notabilis Rex ex List., Mycetozoa, 2nd edition, 182 : 1911, is a 

 form with globose sporangia, convex nodes and more slender threads. 



Var. fusco- purpurea Meylan, Ann. Cons. Bot. Geneve 16 : 319, 

 1913, is described as darker and with most or all of the nodes unex- 

 panded. 



Not common. New York, Virginia, North Carolina, Tennessee, 

 Iowa, South Dakota, Colorado, Wyoming, Washington, Oregon; 

 Europe, Japan. 



