February 1907] 



Mycological Bulletin No. 74 



297 



GROUP 2. 



TYLOSTOMA VERRUCOSUM.— Peridium globose deeply colored, 

 reddish l)ro\vn. with a protruding, tubular mouth. Cortex thin, adnate, 

 verrucose, persistent. Stem deeply colored, covered when growing with 

 long, .spreading scales which mostly fall away from dried specimens leav- 



Vi-. 222. — Ty-los'io-ma ver-ru-co'-sum. (C. G. Lloyd.) 



ing the stems with short scales. Capillitium faintly colored, freely septate, 

 not swollen at the septa. Spores .5-6 mic. aculeate. 



This is evidently a very rare and local plant. I collected it once in 

 company with Prof. Morgan who told me it was the first time he had 

 seen it since tlie original collection some ten or fifteen years before. 1 

 have received it from no correspondent save Mr. Long, Texas, who sent 

 two small specimens bi't evidently the same species. Tylostoma verruco- 

 sum is verj' close to Tylostoma squamosum of Europe, having the same 

 mouth, color, spores rnd stem scales, and is in my opinion the American 

 expression of tlic European plant. It differs in its verrucose cortex and 

 more robust habits. 



GROUP 4. 



TYLOSTOMA ALBICANS.— Peridium uncolored. dirty white, with a 

 small, tubular, circular protruding mouth. Corte.x adherent, separating im- 

 perfectly, particles ndhering to the peridium. at the base of the peridium 

 thickened and subpersistcnt. Stem pale or slightly colored, rough, striate 

 but not scaly. Tntcmally white, with central fibrils Capillitium hyaline, 

 slightly swollen at the joints, with a plane septum. Spores .5-() mic, slight- 

 ly asperate. 



The prominent features arc the uncolored peridium, the tubular mouth, 



