with particles; spores hlackish-brown, threads of capillitium
citrin.
Physarum caesgntosum, Schweinitz, Syn., Fung. Amer. Bar.,
n. 2310; Saco., Syll., vii., 1 , n. 1212.
On leaves and stems of Bhododendron. Bethlehem; United
States.
Physarum muscicolum, Pers.
Sporangia turbinate, grey; stem short, yellowish; capillitium
white; spores black.
Physarum m'lcscicolum, Pers., Obs., i., p. 6 ; Pers., Syn., p. 170 ;
Alb. and Scbw., p. 93; Saco., Syll, vii., 1 , n. 1219.
On tbe larger mosses in pine woods, peat mosses, &o.
Sweden; Germany.
Scattered or gregarious, hypothallus not distinct; stem variable
in length,about twice as long as sporangium,often reddish;
sporangium smooth, at length squamulose, varying from obovate
to cylindrical; threads adnate, white, spores compacted. (Pers.)
Physarum albicans, Peck.
Sporangia whitish, fugacious, except at the base, externally f
mealy with lime granules, globose, as well as the more persistent
whitish capillitium; stem white, tapering upwards,
sometimes connate at the base, slightly penetrating; spores
globose, purplish-brown, -00033' in diameter ( = about 8—9 g).
Physarum albicans. Peck, 30th Keport, State Mus. of N. York,
p. 50, pi. ii., figs. 5—8 ; Saoc., Syll., vii., 1 , n. 1201.
Didymium subroseum. Peck.
Bark and mosses. Adirondack Mts., U. States.
The fragments of the base of tbe peridium sometimes remain
just below the capillitium, surrounding the stem like a calyx
or collar. The stem is even and generally longer than the
peridium, which it penetrates. After tbe spores have fallen
the whitish colour of the capillitium becomes apparent. I t
then resembles a small globose tuft of wool. The plants grew
on tbe branches and mosses of a standing dead birch tree.
Didymium subroseum is apparently tbe same species, with a
pinkish tinge to the peridium. (Peck.)
Physarum effusum, Scbw.
Broadly effused or vermiform, sinuous, and combined to form
a reticulation, whitish, almost membranaceous, very much flattened
; threads of capillitium and mass of spores blackish.
Physarum effusum, Schweinitz, Syn., Fung. Amer., Bar., n.
2297; Sacc., Syll., vii., 1 n. 1211.
Broadly effused on ashes or soot {“pulvere vaporario ”). Salem ;
United States.
Physarum elegans, Sz.
Sporangia crowded, subrotund, difformed, convex, flattened
above, subrugose, clear amethyst-colour; spores blackisb-brown;
threads of capillitium thickish.
Physarum elegans, Schweinitz, Syn., Fung. Amer,, Bar., n.
2294; Saco., Syll, vii., 1. n. 1213.
Salem; United States.
Physarum piceum, Fr.
Scattered; sporangia sessile, globose, pitch-black, shining;
capillitium threads very slender, and witb the spores, smoky-
black.
Physarum piceum, Fr., Syst. Myc., iii., p. 143; Sacc., Syll.,
vii., 1 , n. 1222.
On heaped up decorticated oak branches. Sweden.
Sporangial wall very tbin, membranaceous, very smooth, but
rugulose, dehiscing irregularly, tbe size of a turnip-seed;
capillitium threads very slender, almost inconspicuous. (Fries.)
Physarum antiades. Fries.
Sporangia globose, smoky-brown, marked witb sinuous lines;
stem branched, blackish, sulcate; threads and spores brown.
Physarum antiades, Fr., Syst. Myc., iii., p. 135; Sacc., Syll.,
vii., 1, n. 1209.