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Didmiia 'physarioides, Sclium., Herb.
Biderma depressum, Fr., S. M., iii., 108 (1829).
Diderma lenticulare, Wallr., Herb.
Didymium Michelii, Lib., Exs. ii., 180 (1832).
Didymium hemisphemcum. Berk., Engl. FL, v., p. 312 (1836);
Cke., Hdbk., No. 1119.
Cbondrioderma globosum, Rost.
Sporangia globose, seated on a broad or narrow base, hypothallus
strongly developed, chalk-white, containing much lime, outer wall
thick, white, at length irregularly ruptured; inner wall cinereous,
often iridescent; columella white, small, globose or
ellipsoid; threads of capillitium bright violet, sometimes almost
colourless, forming a dense n e t; spores lilac with tinge of
brown, minutely warted, 8—10 g diameter.
Ghondrioderma globosum, Rost., Mon., p. 180, fig. 138; Cooke,
Myx. Brit., p. 39, 40, fig. 138; Schroeter, p. 370; Saco., Syll.,
n. 1278.
On leaves, twigs, &c. Britain (Norths); France; Germany;
Belgium; Ita ly ; U. States.
Sporangia often subangular from mutual pressure, f—1 mm.
diameter. Columella pure white.
(Rostafinski’s Synonyms.)
Mucilago, 7, Mich., t. 96, f. 6 (1729).
Lycogala, Hall, n. 2143 (1763).
Beticularia sphaeroidalis. Bull., 446, f. 2 (1791).
Diderma globosum, Pers. Disp., t. l,.f. 4, 5 (1797); Eng. FL,
V., p. 312; Cke., Hdbk., 1114.
Didymium candidum, Sohrad., Nov. Gen., 25 (1797).
Didymium globosum, Cbev., FL Par., t. 9, f. 28 (1827).
Physarum sphaeroides, Cbev., FL Par., 339 (1827).
Gionium globosum, Spr., iv., 529 (1827).
Cbondrioderma niveum, Rost. (figs. 89—91).
Sporangia sessile, bemispberical, elliptical or irregular from
mutual pressure, snow-white, polished, dehiscing irregularly;
columella large, depressed, dirty ochraceous or brownish; capillitium
dense, threads 2—3 g thick at the base, remaining fo r
some distance simple, then bifurcating and anasto'mosing laterally,
pale and lilac-brown; spores globose, pale lilac, very minutely
verruculose, many of the warts showing a tendency to become
elongated into ridges, 10—12 g thick.
Chondrioderma niveum, Rost., Mon., p. 170; Cooke, Myx.
Brit., p. 37; Saco., Syll., 1259.
(Specimen named by Rostafinski in Hb. Berk.)
Gn leaves, grass, wood. Britain (Linlithgow).
Scattered or crowded, 2—2’5 mm. across.
Chondrioderma virgineum, Mass. (n. sp.) (figs. 216—220).
Gregarious; regular, hemispherical, sometimes slightly depressed,
sessile on a broad base, wall at first polished, snow-white,
the outer film falling away in patches, grey or pulverulent below ;
columella snow-white, depressed, rugose, extending over the
greater portion of base of sporangium; capillitium forming a
dense net, threads very thin, colourless, coonbining cct numerous
points to foi'm large, irregular, membranaceous expansions of a
pale lilac colour; spores globose, pale lilac, very minutely verruculose,
8—11 g diameter.
Ghondrioderma Gookei, Mass., in Herb., Kew.
Gn leaves. Britain (Hampstead).
(Type in Herb., Kew.)
Densely gregarious, but not crowded, about '5 diameter.
Agreeing witb Ghondrioderma Friesianum, Rost., in the structure
of the sporangial wall, but distinct in the capillitium and
spores.
Chondrioderma dealhata, Mass.
Sporangia scattered or crowded, subglobose, sessile on a broad
base, sometimes seated on a white hypothallus, wall very smooth,
'white, fragile, dehiscing in a circumscissile manner; columella
subglobose, white, sometimes almost obsolete; capillitium dense,