CRIBRARIA 215 



13. Cribraria macrocarpa Schrad. 



Nov. Gen. PL 8, pi. 2, figs. 3, 4. 1797. 

 PL XIV, Figs. 353, 354. 



1808. Trichia macrocarpa (Schrad.) Poiret, in Lam. Encycl. 8 : 55. 



1885. Cribraria tatrica Racib., Hedwigia 24 : 170. 



1889. Heterodictyon bieniaszii Racib., Hedwigia 28 : 121. 



1892. Cribraria bieniaszii (Racib.) Massee, Mon. 60. 



Sporangia more or less closely gregarious, yellowish brown, pear- 

 shaped or obovate, large, 0.8-1 mm. in diameter, stipitate; stipe brown, 

 furrowed, erect or often nodding, about equal to the sporangium or 

 longer, arising from a thin iridescent hypothallus; calyculus distinct, 

 marked by numerous dark brown radiating ribs, iridescent, perforate 

 above, deeply dentate, and merging gradually into the elegant net- 

 work, of which the dark nodes are more distinctly expanded about 

 half way up, less so at the apex and below, the filaments exceedingly 

 delicate, simple, with occasional free ends projecting into the small 

 meshes; spore-mass yellowish; spores by transmitted light almost 

 colorless, minutely roughened, 5-6 /i. 



Perhaps the most striking characteristic of the present species, aside 

 from its large size, is the peculiarly perforated cup or calyculus. Schra- 

 der's artist failed him here completely. The structure is exceedingly 

 delicate, the peridium between the ribs and reticulations reduced to 

 the last degree of tenuity, with the iridescence of the soap-bubble, here 

 and there lapsed entirely. Withal the structure seems firm enough and 

 persists until all the spores are dissipated by the wind. 



Easily distinguished from C. argillacea, its only rival in size among 

 the species with ochraceous spores, by the obovate or turbinate, netted 

 sporangium, the much longer stem, and the flat, perfectly formed nodes. 



Rare. New York, North Carolina, South Carolina, Ontario, Wash- 

 ington, Oregon, Chile; Europe. 



14. Cribraria tenella Schrad. 



Nov. Gen. PL 6, pi. 3, figs. 2, 3. 1797. 

 PL XIV, Figs. 355, 356. 



Sporangia gregarious, globose, small, 0.3-0.5 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 



