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PLcelLaph. 9. GASTEROMYCE^. 21.2.DIdyni. 571
2. Didymium testaceum. Pearly sk'/n-moidd.-
Sporangia sessile, roundish, hemispherical, flesh-colour,
afterwards whitish.
Didymium testaceum, ScJirad. N. Gen. PL, 1, 25.
Diderma testaceum, Persoon S^n. 167.
On decayed leaves; autumn.
3. Didymium diffhrme. Irregular bkiti-mouM.
Sporangia sessile, smooth, difform ; outer peridium snow-white;
inner bluish; sporidia dull-brown.
Reticulari.i angulata, Gnielin Syst. Nat. 2, 1472.
Diderma difiForme, Persoon Syn. 167.
On the stems of the potatoe-plant.
XII. 213. DIDERMA. Link. Tall-mould.
Sporangium roundish or globular ; peridia double, both
membranaceous, bursting; outer chaffy; columella 0; sporidia
crowded.
Diderma muricolum. Wall tall-mould.
Sporangium roundish, lobed, rather angular, sessile;
outer peridium white ; inner brown ; sporidia black-brown.
Diderma Muricola, Link in Berl. Mag. 3.
Diderma difforme, Alb. et Schwein, Fung. 90,
On mosses.
XIII. 214.. CIONIUM. Link. • Flock-mould..
Sporangium globular, pedicelled; peridium single, membranaceous,
bursting, separating into scales ; columella
distinct.
1. Cionium iridis. Flag Jlock-motdd.^
Sporangium globular, pedicelled ; peridium grey ; pediceU
yellow, thickest at bottom.
Cionium iridis, Ditmar in Sturm. Deutsch. Fl. 3, 1.
On the leaves of the yellow water-flag ; summer.
2. Cioniumfarinaceum. Floury Jlock-motdd.
Sporangium globular, pedicelled; peridium grey; pcdicell
grey, thickest at bottom.
Didymium farinaceum, Schrad. N. Gen. 26.
Trichia compressa, Trentepohl in Roth Cat. Bot. 1, 229.
Pliysarura melanospermum, Persoon Disp. 3.
Physarum farinaceum, Persoon Syn. 175, 15.
. On the branches of pine-trees, or the mosses on thepi.
Sporangia sometimes unite in pairs.
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