e more persistent cyathiform portion
standing on the substratum.

Sec.1. EU-CRATERIUM. Sporangium at maturity dehiscent in a regular
circumscissile manner, the apex falling away as a lid, leaving behind
the more persistent cup-shaped portion.

1. CRATERIUM MINUTUM, Leers. Sporangium cyathiform, stipitate; the lid
slightly convex, discrete from the first, usually depressed below the
rim of the cup, falling away at maturity, and leaving a smooth, circular
margin to the lower cyathiform portion. The wall a thick, firm,
yellow-brown membrane, the outer surface of the cup entirely naked,
smooth and shining, varying greatly in color from alutaceous or
ochraceous to various shades of brown; the lid usually whitened by a
thin layer of granules of lime. Stipe short, erect or bent, and slightly
curved at the apex, varying in color from rusty yellow to reddish brown,
longitudinally plicate, arising from a small, circular hypothallus.
Capillitium of tubules forming a loose net-work, bearing large,
irregular, white nodules of lime, which are sometimes confluent in the
axis of the sporangium. Spores globose, very minutely warted,
violaceous, 8-10 mic. in diameter.

Growing on old wood, sticks, leaves, etc. Sporangium, together with the
stipe, .8-1.4 mm. in height and .3-.5 mm. in diameter, the stipe usually
shorter than the sporangium, sometimes equal to it in length, rarely
longer. The latest authorities include the three species _Craterium
vulgare_, _C. pyriforme_, and _C. minutum_ of Rostafinski's monograph
all in one species.

2. CRATERIUM CONCINNUM, Rex. Sporangium usually minute, broadly
funnel-shaped, stipitate; operculum always more or less convex, rarely
approaching a hemispherical shape, dehiscent in a regular circumscissile
manner. The wall a thick, brownish membrane, externally smooth and
variously colored, sometimes uniformly light or dark umber, sometimes
dark brown below and brownish white above; the operculum brownish white,
darkest in the center. Stipe short, dark brown, longitudinally ridged.
Capillitium of tubules forming a close-meshed net-work, bearing small
rounded or slightly angular nodules of lime, ochre-brown in color.
Spores globose, very minutely warted, brown, 9-10 mic. in diameter.

Growing usually upon chestnut-burs, and frequently associated with
_Lachnobulus globosus_. Sporangium .5-.8 mm. in height including the
stipe and .2-.5 mm. in diameter at the top, the stipe equaling the
sporangium in le