i8 Cinciiniati Society of Natural History. 



threads about as thick as the spores, branched ; spores glo- 

 bose, very minutely warted, 35-45 niic. in diameter, with a 

 minute pedicel. 



Growing on the ground in open woods and pastures. Wis- 

 consin, Trelease. Peridium Yi-^yi inches in diameter and 

 }^-ij4 inches in height. " This species superficially resembles 

 small plants of L. i^labelhun so closely that it is difficult to 

 distinguish them." The spores, however, "afford constant 

 and certain means of distinguishing them." 



/•. Cortex of Diinute spinules scales or granules, 



** Lignatile. 



24. Iv. PYRiFORME, SchaefiF. Peridium obovoid or pyri- 

 form, with an abundant mycelium of very long white branch- 

 ing fibers. Cortex a thin coat of minute scales or granules or 

 short stout spinules, whitish gray or brownish : it is quite 

 persistent, drying up and becoming reddish-brown in color 

 and often rivulose or areolate. Subgleba small, white, quite 

 compact, the cells minute ; mass of spores and capillitium 

 greenish-yellow, then brownish-olivaceous ; threads thicker 

 than the spores, branched, those in the center very long and 

 forming a dense tuft; spores globose, even, 3.5-4.5 mic. in 

 diameter. 



Growing on old timber or sometimes on the ground : usually 

 caespitose, sometimes in dense clusters several feet in extent. 

 New England, Frost; New York, Peck: Pennsylvania, 

 Seine e i 7iit z ; North Carolina, Curtis; 0\i\o, Lea ; Wisconsin, 

 Trelease; Kansas, Crai^in; California, Harkuess. Peridium 

 }i-i}i inches in diameter and 1-2 inches in height. The 

 commonest of all puff-balls, distributed throughout the whole 

 w(jrld. 



25. L. si'iiiNCAKNATUM, Peck. Peridium globose, sessile, 

 with a mycelium of long branching white fibers. Cortex 

 pinkish-brown, composed of minute .short stout spinules, 

 which fall away after maturity, leaving the surface of the 

 inner peridium deeply pitted. Subgleba quite small, but 

 usually distinct ; ma.ss of spores and capillitium greenish- 

 yellow, then brownish-olivaceous: threads long, simple, 

 livaline, once to twice as thick as the spores; sjiores globose, 

 minutely warted, 4-4.5 mic. in diameter. Plate II, P'ig. 6. 



