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C h o n d r i o d e r m a r a d i a t u m , Kost. (figs. 92—95).
Sporangia stipitate or sessile, subglobose or depressed, mnlili-
cate below, pallid or witb a brown tinge, wben mature splitting
in an irregnlarly stellate manner from the apex, segments reflexed,
persistent; stem, when present, shorter than sporangium,
attenuated downwards; columella large, globose or slightly elongated,
rugulose, pallid or with a rufous tinge; threads of capillitium
thin, fuliginous, or almost colourless, simple below, then
bifurcating at acute angles, now and then combining laterally ;
spores globose, violet-brown, minutely warted, 9—12 g diameter.
Ghondrioderma radiatum, Rost., Mon., p. 182, figs. 152, 153,
155, 156, 170; Cooke, Myx. Brit., p. 40, figs. 152, 153, 155, 156,
170; Schroeter, p. 123.
Biderma stellare. Fries. Seler. Suoc. Exs.
On wood, bark, &c. Britain (King’s Cliffe, Scarboro’);
Sweden; Germany; Denmark; France; United States.
Sporangia scattered or loosely gregarious, about '5 mm.
diameter before dehiscence. Recognized amongst the species
that dehisce in a stellate manner by the umbilicate sporangium,
which is constant when the specimens are sessile, the large
rugulose pale columella, and the minutely warted spores.
(Rostafinski’s Synonyms.)
Lycoperdon radiatum, Linn., sp., 1654 (1753).
Bidymium stellare, Schrad., t. 5, f. 3, 4 (1797).
Bidxrma stellare, Pers. Syn., 164 (1801).
Biderma umbilicatum, Pers. Syn., 165 (1801); Eng. FL, v.,
310; Cke., Hdbk., No. 1106.
Bidei-ma crassipes, Schum. Saell., 1421 (1803).
Beticularia umbilieata, Poir., Ency.
Bidymium geäster. Link, diss. ii., 42 (1809).
Leangium stellare. Link, diss. ii., 42 (1809).
Gionium stellare, Spr. Syst., iv., 529 (1827).
Gionium umbilicatum, Spr. Syst., iv., 529 (1827).
Leangium umbilicatum, Rabh. FL Crypt., 285 (1844).
Bidymium compilanatum, Fckl., Sym. Myc., 341 (1869).
C h o n d r i o d e r m a g e a s t e r o i d e s , P h i l .
Sporangia sessile or shortly stipitate, globose or broadly
pyriform, ochraceous-bi'own, polished, dehiscing in a stellate
manner into five or six unequal, acute segments which become
strongly refiexed, inner surface of wall white, rough with
granules of lime; stem, when present, shorter than sporangium,
thick, obscure brown; columella globose, ochraceous-brown;
threads of capillitium brownisb or almost colourless, repeated
branching in a diehotomous manner, and anastomosing laterally
to form a network; base of each bifurcation swollen and darh-
colcfured; spores globose, brown, minutely warted, 11—14 g
diameter.
Ghondrioderma geasteroides, Phil., in Herb.
Biderma geasteroides, Phil., Grev., v., 5, p. 113, t. 87, fig. 1,
a—f; Sacc., Syll., 1293.
Biderma laciniatum, Phil., Grev., v., 5, p. 113, t. 87, fig. 2,
a—f; Sacc., Syll., n. 1294.
(Types in Herb., Phillips.)
On rotten wood, mosses. &c. California.
For an opportunity of examining the present and other types
of Myxogastres from California, I am indebted to the kindness
of Mr. Wm. Phillips, F.L.S., of Shrewsbury.
Gregarious or scattered, f—1 mm. high. After dehiscence
the present species is a very beautiful object under a low power,
the snow-white inner surface of the refiexed segments standing
out in contrast to the purple-black mass of spores, and the
ochraceous-brown or fulvous outside colour. Distinct from G.
radiatum, its nearest ally, in the peculiar structure of the
capillitium and the colour and coarsely granular inside of the
sporangial wall, the spores are also larger in the present species.
C h o n d r i o d e r m a L y a l l i i , Mass. (n. sp.).
Scattered or aggregated; sporangia globose or broadly obovate,
stipitate, wall thick, polished, whitish or pallid, splitting in an
irregularly stellate manner; stem shorter than sporangium,