Figs. 221-222.
1894. _Craterium pedunculatum_ Lister, _Mycetozoa_, p. 71.
1911. _Physarum brunneolum_ Mass., Lister, _Mycetozoa, 2nd ed._,
p. 63, Pl. 69, Fig. _a_.

Sporangia scattered or gregarious, but not crowded, sessile, globose or
sub-depressed; peridium double, thick, smooth or polished, yellow brown,
stellately dehiscent, the segments reflexed, white within; columella
none; capillitium dense, with nodes numerous, large irregular,
internodes thin and short; spores globose, lilac, minutely warted, 6-7
mu.

This form was first described in _Grevillea_, V., p. 114, as _Diderma
brunneolum_ Phillips. Later, students of the specimens preserved by Mr.
Phillips, concur that we have to do not with a diderma, but with a
craterium, Lister, or physarum, Massee. There seems no reason why we
should not respect the decision of Massee, whose description is here
quoted in form somewhat abridged. The peridium is about as double as in
the many physarums, not more so; the inner membrane so delicate as only
occasionally to be revealed except to scrutiny most searching. But the
appearance as a whole is as of some brown diderma; only the calcareous
capillitium abides to prevent mistaken reference.

When opened by irregular dehiscence from above, the persisting cup-like
base of the sporangium recalls _Leocarpus fragilis_; but then again the
capillitium is different.

California, Portugal; Colorado,--_Sturgis._

13. PHYSARUM CINEREUM (_Batsch_) _Pers._

PLATE IX., Figs. 4, 4 _a_, 4 _b_.

1786. _Lycoperdon cinereum_ Batsch, _Elench. Fung._, p. 249, Fig. 169.
1801. _Physarum griseum_ Link, _Diss._, I, p. 27.
1805. _Physarum cinereum_ Persoon, _Synopsis_, p. 170.
1829. _Didymium cinereum_ Batsch, Fries, _Syst. Myc._, III., p. 126.
1829. _Physarum plumbeum_ Fries, _Syst. Myc._, III., p. 142.
1875. _Physarum cinereum_ Batsch, Rost., _Mon._, p. 102, in part.
1896. _Physarum plumbeum_ Fr., Morgan, _Myx. Mi. Val._, p. 98.
1899. _Physarum plumbeum_ Fr., Macbr., _N. A. S._, p. 35.
1909. _Physarum cinereum_ (Batsch) Pers., Torrend, _Flore des Myx._,
p. 183.

Plasmodium watery white, or transparent, wide streaming on decaying sod,
etc. Sporangia sessile, closely gregarious, or even heaped, sub-globose,
elongate or plasmodiocarpous, more or less calcareous, gray; peridium
simple, thin, more or less densely coated with lime; capillitium
strongly developed, the nodes more or less richly