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564 201.Stilbum. 8. NEMATOMYCEiE. PlceU.apL 2. Stilhum vul^are. Common glancehead. Stromnta cylindrical, thickish, crowded into yellowish white tufts ; heads hemispherical, withering. Stilbum Tulgare, Persoon Syn. 682. On half- rotten stalks ; autumn. 3. St'ilhim lullosum. Bullous glancehead. Stroma slender, bulbous at bottom, ochre-yellow; head spherical, white, strewed with a yellowish powder. Stilbum bulbosum, Persoon Syn. 682. On rotten plants, in covered situations; autumn after heavy rains. Fam. IX. 9. GASTEROMYCE^. Fungormn pars, Linnaeus, Jussieu. GasferomT/ci, Persoon. Thallus 0; peridium single or double, membranaceous or leatherlike, bladdershape ; sporidia naked, or intermixed with fibres, included in the peridium, at first generally liquid. A. Peridium thin, sessile, irregular, lecoming fihrmis, or skinny ; sporidia in heaps. Spumarideae. Peridium membranous, globular sporidia naked, conglomerate Eurotium. 202. Per. sessile, outside towlike, ins. flaky; sporidia naked, conglobate JEthalium. 203. Per. membranous, fibres membranous at the axillae ; spor. in heaps Lignydium. 204. Per. cellularly fibrous, ascending sporidia in heaps Spumaria. 205. Per. membranous; fibres upright; sporidia in cylinders Strongylium. 206. Per. membranous, becoming fibrous sporidia crowded Lycogala. 207. B. Peridium thin, sessile, irregular, vanishing in dust sporidia in heaps, Myrotheciadeee. Dermodium. Perid. flattened, branlike, brittle sporidia conglutinated Myrothecium. 208. Perid. flattened, covered with granules; sporidia conglobated . ., Dichosportum. 209. Perid. globular or cylindrical, thin; sporidia heaped Licea. 210. Perid. irregular, very thin, vanishing; sporidia conglobated, very numerous . . 211.

PI. cell. aph. 9. GASTEROMYCE.E. 505 C. Peridium thin, pedicelled or regular, Irittle ; Jibres growing from the base, enclosed; sporidia conglobated* Physarideae. Peridium double; columell distinct . . , Didymium. 212. Perid. double ; columell Di derma. 213. Perid. single, scaly; col. distinct Cionium. 214. Perid. single, scaly; col. Physarum. 215. Pmc?. single, membranous; coZ. distinct Leangium. 216. Peric?. single, membranous ; coZ. ... Leocarpus. 217. D. Peridium thin, pedicelled or regular, brittle ; Jibres exserted, springing elasticallyfrom the base. Trichiadete. Perid. bursting ; Jibres ascending in an irregular mass from the bottom Trichia. 218. Perid. vanishing, leaving a saucer Jibres rising elastically, falling off ....... . Arcyria. 219. E. Peridium thin, pedicelled, regular, becoming Jlocklike, tietworked. Cribaridese. Perid. becoming netlike at top Cribaria. 220. Perid. becoming netlike throughout . . DiCTvmuM. 221. F. Peridium thin, single pedicelled, vanishing aivay ;fbres free, in ?ietivork, perforated by the stem. Stemonitidese. Perid. globular or long Stemonitis. 222. G. Peridium thin, single, operculated ; fibres falling off with the sporidia. Craterideae. orfee and Peridium pedicelled ; fiocci many . . . Craterium. 223. Peridium sessile; fiocci Pyxidium. 224. H. Peridium crustlike, fibrous, single ; sporidia naked, conglobated. OnygenideaB. Perid. globular; pedicells fibrous OnycxENA. 225. I. Peridium leatherlike, double, outer peridium starlike, the inner projectile ; sporidia naked, conglobated. Sphsero- bolideffi. Perid. globular, sessile Sph^robolus. 226.

PI. cell. aph. 9. GASTEROMYCE.E. 505<br />

C. Peridium thin, pedicelled or regular, Irittle ; Jibres<br />

growing from the base, enclosed; sporidia conglobated*<br />

Physarideae.<br />

Peridium double; columell distinct . . , Didymium. 212.<br />

Perid. double ; columell Di derma. 213.<br />

Perid. single, scaly; col. distinct Cionium. 214.<br />

Perid. single, scaly; col. Physarum. 215.<br />

Pmc?. single, membranous; coZ. distinct Leangium. 216.<br />

Peric?. single, membranous ; coZ. ... Leocarpus. 217.<br />

D. Peridium thin, pedicelled or regular, brittle ; Jibres<br />

exserted, springing elasticallyfrom the base. Trichiadete.<br />

Perid. bursting ; Jibres ascending in<br />

an irregular mass from the bottom Trichia. 218.<br />

Perid. vanishing, leaving a saucer<br />

Jibres rising elastically, falling off ....... . Arcyria. 219.<br />

E. Peridium thin, pedicelled, regular, becoming Jlocklike,<br />

tietworked. Cribaridese.<br />

Perid. becoming netlike at top Cribaria. 220.<br />

Perid. becoming netlike throughout . . DiCTvmuM. 221.<br />

F. Peridium thin, single pedicelled, vanishing aivay ;fbres<br />

free, in ?ietivork, perforated by the stem. Stemonitidese.<br />

Perid. globular or long Stemonitis. 222.<br />

G. Peridium thin, single, operculated ; fibres<br />

falling off with the sporidia. Craterideae.<br />

orfee and<br />

Peridium pedicelled ; fiocci many . . . Craterium. 223.<br />

Peridium sessile; fiocci Pyxidium. 224.<br />

H. Peridium crustlike, fibrous, single ; sporidia naked,<br />

conglobated. OnygenideaB.<br />

Perid. globular; pedicells fibrous OnycxENA. 225.<br />

I. Peridium leatherlike, double, outer peridium starlike,<br />

the inner projectile ; sporidia naked, conglobated. Sphsero-<br />

bolideffi.<br />

Perid. globular, sessile<br />

Sph^robolus. 226.

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