CRIBRARIA 213 



Rare, but widely distributed. New York, South Carolina, Ontario, 

 Ohio, Washington, West Indies; Europe, West Africa, Ceylon. 



10. Cribraria oregana Gilbert 



Am. Jour. Bot. 19 : 142. 1932. 

 PI. XIV, Figs. 348, 349. 



Sporangia gregarious, dark brown, nearly black, small, 0.3-0.4 mm. 

 in diameter, erect; calyculus nearly black, about one-half the spo- 

 rangium, the margin deeply toothed, granular; net arising from the 

 broad teeth of the margin; nodes thickened, large, flat and angular, 

 crowded with dark granules; connecting threads fine, granular, with 

 few free ends; hypothallus very small; stipe light brown, short, 0.5- 

 0.7 mm., nearly smooth, tapering upward from a broad base; spores 

 in mass dark brown, pale filaceous by transmitted light, with a con- 

 spicuous guttule in each, minutely warted, globose or oval, the spher- 

 ical 8-9 ix, the oval sometimes attaining 10 \i or more in the longer 

 dimension. 



Distinguished by the large spores and the dark color. The teeth at 

 the margin of the calyculus are very broad, and two fine threads 

 usually extend from each to the irregular nodes. The large granules 

 frequently have a dark center with a paler peripheral portion. 



Oregon. 



11. Cribraria dictyospora Martin &• Lovejoy 



Jour. Wash. Acad. Sc. 22 : 91. 1932. 

 PI. XIV, Figs. 365, 366. 



Sporangia gregarious, dark purplish brown, erect or slightly nodding, 

 globose, 0.4-0.8 mm. in diameter, total height 1-2 mm. ; calyculus 

 occupying about one-third of the spore-case, marked with irregular, 

 dark, granular rays, the margin toothed; net rather fine-meshed, the 

 connecting threads narrow, the nodes flat and angular, not greatly 

 thickened, densely filled with large, dark granules, making them appear 

 black, free ends abundant, often branched, arising both from nodes 

 and from connecting threads; stipe slender, two or three times the 

 diameter of the sporangium, furrowed, light at the apex, otherwise 

 dark; spores ochraceous brown in mass, clear violet by transmitted 

 light, globose or somewhat angular, minutely warted, and under oil 

 immersion shown to be covered with a coarse and often imperfect 

 reticulum of three to five meshes to the hemisphere, 8-8.8 \i, averaging 

 8.5 /x. 



The most striking characteristic of this species is the reticulation of 



