78 THE NORTH AMERICAN SLIME-MOULDS 



This is the common form in the United States. Massee 

 describes it as C. cylindricum Mass., and it seems not to occur 

 in Europe. Lister has put it in with C. leucocephalmn, from 

 which its more delicate structure and elegant cylindrical shape 

 certainly distinguish it. The dehiscence is even more regular 

 than in the preceding species and approaches that of C. minn- 

 tum Leers., with bleached forms of which it must not be con- 

 fused. N. A. F., 1400. 



New England to Iowa and south. 



6. CRATERIUM CONCINNUM Rex. 



1893. Craterium continuum Rex, Proc. Phila. Acad., p. 370. 



Sporangia scattered, usually minute, broadly funnel shaped, 

 stipitate. The peridium simple, variously colored by innate 

 lime granules, opening by a regular cap or operculum, brownish 

 white, darkest in the centre, always more or less convex ; stipe 

 equalling the cup in height, dark brown, longitudinally ridged ; 

 the capillitium a close-meshed network, with small rounded or 

 slightly angular masses of ochre brown lime granules, larger 

 toward the centre ; spores pale brown, minutely warted, 9-10 p. 



This species differs from the following, to which it seems 

 most nearly allied in form, color, as in the capillitium, and color 

 of the spores. In habitat as well, it seems no less distinct, 

 being found always (?) on the spines of decaying chestnut burs 

 lying on the ground, and in company with that other peculiar 

 species, Laclinobolus globosus. 



The range is probably that of the chestnut, Castanea sativa 

 Mill, var. americana, east of the Mississippi River. 



7. CRATERIUM MINUTUM {Leers) Fries. 



PLATE XV., Fig. 5. 



1775. Peziza minuta Leers, Fl. Herborn, p. 277. 



1797. Craterium pedunculatum Trentepohl, Roth, Catal. Ztot., p. 224. 



1813. Craterium vulgare Ditmar, Sturm, Dcutsch. Fl. Pilze, p. 17. 



1829. Craterium pedunculatum Trent., Fries, Syst. Afyc., III., p. 150. 



1829. Craterium minutum Leers, Fries, Syst. Myc., III., p. 151. 



