428 White : Tvlostomaceae of North America 



Stem not tapering ; peridium globose. 



Capillitium freely septate ; stem short (1-1.5 cm.), collar close. 



5. T. viinutiim. 

 Capillitium rarely or never septate ; stem longer (1.5-5 cm. ), collar 

 distant. 6. T. Kaiiscnse. 



Mouth raised, convex. 



Capillitium freely septate ; outer peridium long persistent. 



7. T. poculatum. 

 Capillitium rarely or never septate ; outer peridium soon receding. 



8. T. obestim. 

 Spores verrucose or granular. 



Mouth plane. 9- ^- campestre. 



Mouth raised, convex. 



Spores furnished with long blunt spinules ; stem short (0.75 cm. ), rough 



spiny. 10. T. exasperattuii. 



Spores with coarse scattered tubercles ; stem longer (3 cm. ), even, nearly 

 smooth. II- T. tuberculatum. 



Spores finely granulate-verrucose. 



Capillitium sparingly septate, not much swollen at the joints. 



Stem elongate (6 cm.), with copious persistent mycelial strands. 



12. T. fibrillosutn . 

 Stem shorter (3.5 cm.), without mycelial strands. 



13. T. subfuscum. 

 Capillitium freely septate, swollen at the joints. 



Peridium smooth ; inouth fimbriate. 14- T. fitubriatuni. 



Peridium pitted ; mouth lacerate. 15. T. punctatum. 



I. Tylostoma albicans sp. nov. 



Peridium depressed globose, 0.7-1 cm. high, 1-1.5 cm. in 

 diameter : outer peridium scaly, retreating and leaving a smooth 

 whitish surface to the inner membranaceous peridium : mouth short 

 tubular, entire, prominent : collar irregular, 3-5 mm. distant from 

 the stem : stem equal, slightly thickened at the base, the outer coat- 

 ing lacerate scaly, whitish like the peridium, 4-6 cm. long, 0.5 cm. 

 in diameter : capillitium whitish, hyaline, branched, septate, slightly 

 swollen at the joints, 4-6 // wide, free ends rounded : spores reddish 

 brown, irregularly globose, pedicled, smooth, or if rough only a- 

 vcry few of them so, 4-5 /^ in diameter. (PI. 31, f. A--?-) 



Texas : E. D. Cope. 



2. Tylostoma pedunculatum (L.) Schroeter ; Cohn, Beitr. Biol. 



Pflan. 2 : 65. 1877 

 Lycoperdon pedunculatum L. Sp. PI. 1 1 84. 1753- 

 Tulostoma bnimalc Pers. Romer Neues Mag. Bot. i : 86. 



1794. 



Tulostoma mammosum Fr. Syst. 3: 42. 1829. 



