licate, arising from a small
hypothallus. Capillitium of tubules forming a dense net-work, bearing
numerous large irregular white nodules of lime, which are often
confluent in the axis of the sporangium. Spores globose, very minutely
warted, violaceous, 8-10 mic. in diameter.

Growing on old leaves, herbaceous stems, etc. Sporangium .6-1.0 mm. in
height including the stipe and .3-.5 mm. in diameter, the stipe much
shorter than the sporangium. The thin apex breaks up into pieces and
falls away, leaving sometimes a regular cyathiform portion, at other
times the margin is broken and irregular. This is _Craterium
leucocephalum_ of Rostafinski's monograph. The specimens of _Physarum
scyphoides_ C. & B. which I have seen appear to be a small form of this
species.

6. CRATERIUM AUREUM, Schum. Sporangium obovoid to oblong obovoid,
stipitate, the wall a thin and delicate membrane above, thicker and
firmer below, hyaline or yellowish, almost entirely covered by a dense
layer of granules of lime, varying from lemon-yellow to orange in color.
Stipe short, erect, yellow to orange, brownish toward the base,
longitudinally plicate, rising from a small hypothallus. Capillitium of
slender tubules, forming a dense net-work, bearing numerous rather small
irregular nodules of lime, yellow or sometimes white in color, and often
confluent along the axis of the sporangium. Spores globose, very
minutely warted, dark violaceous, 8-10 mic. in diameter.

Growing on old leaves, sticks, herbaceous stems, etc. Sporangium and
stipe .7-1.0 mm. in height and .3-.5 mm. in diameter, the stipe .2-.4
mm. long. The elongated form is the common one in this region.
_Craterium mutabile_ Fr.

_b. Stipe longer than the sporangium._

7. CRATERIUM NODULOSUM, C. & B. Sporangium globose or obovoid,
stipitate; the greater part of the wall a thin hyaline membrane, easily
breaking away, covered externally with large white scales and nodules of
lime; the basal portion naked, thickened, and more persistent, red-brown
and plicate. Stipe long, erect or inclined, plicate, red-brown, rising
from a small hypothallus. Capillitium of tubules forming a loose
net-work, containing a variable quantity of lime in the shape of long
irregular white nodules, sometimes confluent, with pointed lobes and
branchlets. Spores globose, very minutely warted, dark violaceous, 10-12
mic. in diameter.

Growing on old wood, bark, leaves, etc. Sporangium .5-.6 mm. in
diameter, the stipe two