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Mycological Bulletin No. 74 



Vol. v.] 



wliite with central fibrils. Capillitium faintly colored, not swollen at 

 the septa. Spores /J mic, granulose. 



This species has been, I am sure, usually determined as Tylostoma 

 mammosum in the United States. It differs from Tylostoma mammosum 

 of Europe in its more deeply and uniformly colored and larger peridium, 

 its short, thick, scaly stem and in its capillitium nodes. 



Fig. 227. — Ty-lo.s' -lo-MA pur-pu'-si-i. (C. G. Lloyd). 



TYLOSTOMA PURPUSII.— Peridium pale, castaneous color, darker 

 at the mouth, with a circular, tubular, protruding mouth. Cortex partly 

 adherent at the base but mostly freely separating, leaving the peridium 

 smooth. Stem colored, rough but not scaly. Capillitium .-.ubhyaline, the 

 septa rare, those of the smaller branches swollen but of the large 

 branches very slightly. Spores .5 mic, asperate. 



This species can easily be taken as a giant form of Tylostoma mam- 

 mosum. It is a rare plant and I have seen from .Vmerica only the type 

 specimens at Berlin, which were collected in Colorado b3 a Mr. Purpus. 



Fiff. 2'-:8. — '1'v-los'-io-n: A n.oR-inA'-NUM. (C G. Llnycl). 



