CRIBRARIA 225 



nodules small, globose or undifferentiated, slightly convex or flat; 

 spore mass dull, yellowish brown; spores by transmitted light pale 

 ochraceous or salmon-tinted, nearly smooth, 5-6 fx. 



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

 though variable, is j'et generally so far pyriform as to show distinct 

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

 ed 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 net open, uniform, the stipe 

 rather stout, short, and distinctly furrowed, rising often from a small 

 hypothallus — these are marks of this species. The net suggests C. 

 tcnella, 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. 



Apparently rare. Our specimens are from New York, through 

 the courtesy of Dr. Rex, Virginia, North Carolina, Iowa, Oregon, 

 Colorado, and represent, as usual a modification of the European 

 type, C. notabilis Rex. Miss Lister, Mon., 2nd ed., writes var. 

 notabilis. 



Colorado forms are remarkable for dense brown coloration. 



10. Cribraria tenella Schrader. 



Plate XVII., Fig. 5. 

 1797. Cribraria tenella Schrad., Nov. Gen. PL, p. 6. 



Sporangia gregarious, small, .3-.5 mm. in diameter or smaller, 

 olivaceous or ochraceous, long-stipitate, nodding; stipe slender, dark 

 brown or blackish, very long, reaching 6 mm., weak and flexuous; 

 calyculus variable, sometimes well defined, brown, costate, sometimes 

 represented by the costae only connected by a thin, transparent mem- 

 brane ; net well differentiated, the meshes small, irregular, the nodes 

 small, black, more or less globular, prominent, connected by trans- 

 parent threads with occasional or a few free ends; spores in mass, 

 olivaceous-ochraceous, under the lens pallid, globose, smooth, 5-7 fi. 



Very common eastward and south, on the weathered surface of 

 rotten wood. Generally easily recognized by its very long stipe, 



16 



