ile; the wall a more or less thickened membrane, the external
surface destitute of lime, polished and shining, irregularly dehiscent.
Stipe short, poorly developed or sometimes wanting. Capillitium of
slender tubules, forming an irregular net-work more or less expanded at
the angles; the tubules enlarging at intervals into vesicles, which
usually contain nodules of lime. Spores globose, violaceous.

A genus characterized by the form of the sporangia and the smooth and
glossy surface of the wall.

1. LEOCARPUS PSITTACINUS, Ditm. Sporangium small globose or somewhat
depressed, stipitate or subsessile; the wall a thin membrane, rugulose
and iridescent, with thicker red or yellow spots and patches, destitute
of lime. Stipe weak, erect or inclined, variable in length, the base
expanded, orange to red in color. Capillitium a dense net-work of
tubules, widely expanded at the angles and bearing numerous irregular
vesicles, various in size and form, yellow or orange to red in color.
Spores globose, even, dark violaceous, 7-9 mic. in diameter.

Growing on old wood, leaves, etc. The sporangium .5-.6 mm. in diameter,
the stipe about the same length or sometimes very short. The sporangia
are dull brownish to the naked eye, but when magnified the green,
purple, and blue metallic tints of the wall become apparent. There does
not appear to be any granules of lime either on the wall or in the
capillitium. _Physarum psittacinum_ Ditm.

2. LEOCARPUS CAESPITOSUS, Schw. Sporangium small subglobose or obovoid to
turbinate, somewhat irregular, stipitate or subsessile; the wall a
reticulately thickened and fragile membrane, yellow-brown to
greenish-yellow or olivaceous in color, externally rugulose and glossy,
the inner surface with scales and patches of lime. Stipe short and
thick, sometimes nearly obsolete, yellowish or reddish brown, darker
below, the base expanded into a small hypothallus. Capillitium a loose
irregular net-work of tubules with wide expansions at the angles; the
nodules of lime large, numerous, white or yellowish, irregular, with
acute angles and pointed lobes. Spores globose, minutely warted, dark
violaceous, 9-11 mic. in diameter.

Growing caespitosely or scattered on old wood and mosses. Sporangium
.6-.8 mm. in diameter, variable in shape, the stipe usually very short.
_Physarum caespitosum_ Schw., _North American Fungi_. My specimens, some
of them, have been referred to _Physarum citrinellum_ Peck; others to
_Physa