' I \i I
306
72. .®THALItrM, Lk.
Peridium indeterminate, externally covered by a floccose
evanescent bark, cellular within from the c o n f l u e n t interwoven
flocci.
1. septicum, Fr. In woods, on various substances.
3. vaporarmm, F r . ; Grev. t. 373. In stoves, on bark.
73. SPUMARIA, P.
Peridium indeterminate, simple, crustaceous, flooculoso-
cellular. Spores surrounded by membranaceous, ascending,
often sinuous folds.
1. alba, DO.; Grev. t. 367. On living culms of grass, etc.
74. DIDERMA, P.
Peridium double; external, distinct, crustaceous, smooth;
internal delicate, evanescent, attached to the straggling flocci,
with or without a columella.
I . floriforme, P . Syn. p . 165 ; Bull. t. 371. On decayed wood, etc.
3. umbilicatum, P . I. c.; I I . Dan. 1973. / . 1. On dead bark, etc.
3. citrinum, Fr.; Fl. Dan. 1 3 1 3 ./. 1. On Sphagnum.
4. vernicosum, P . Ohs. t. 3 . / . 7; Grev. t. 111. On dead leaves, etc.
B. spumarioides, F r .; F l. Dan. 1798. / . 3. On moss, dead leaves, etc.
6. Trevelyani, F r . ; Grev. /. 133. On mosses.
7. Carmichaelianum, B . in Engl. Fl. I. c. p. 811. On mosses.
8. nitens, Klotzsch; Engl. Fl. I. c. On bark.
9. globosum, F r.; Grev. t. 133. On dead leaves.
10. eyanesoens, Fr. On dead and living leaves.
I I . deplanatum, Fr. On dead oak-leaves, etc.
12. contextum, P . Ohs. i. ji. 89; Ditm. in Sturm, i. t. 39; {no. 109). On
dead grass, fern, etc.
75. DIDYMIUM, Schrad.
Peridium scaly or floccose, bursting irregularly.
1. melanopus,Pr.(»o.383),andy8clavus(«o.llO). On various substances.
2. heiuisphmrioum, Fr.; Sow. t. 13. On dead twigs, etc.
3. furfuraceum, Fr. {no. 734). On dead leaves.
4. tigrinum, Fr.; Schrad. t. 6./. 3, 3 ; {no. 383). On decayed wood.
5. squamulosum, A. and S. t. 4./. 5. On dead leaves, etc.
6. farinaceum, Fr.; Schrad. t. 5./. 6. On dead leaves, etc.
7. nigripes, Fr.; Ditm. t. 43. On rotten wood.
8. pei'tusum, B. Eng. Fl. I. c. p. 313. On dead herbaceous stems.
9. xanthopns, Fr.; Ditm. t. 43 ; {no. 111). On dead leaves.
10. leucopus, Fr.; Lk. Diss. i. p. 37. On dead leaves, etc.
11. Sowerbeii, B.; Sow. t. 412./. 3. On a decaying bulb.
13. lobatum, Nees, Syst.f. 104. On mosses.
13. congestum, B. and Br. {no. 884). On dead leaves, grass, etc.
14. dsedaleum, B. and Br. {no. 385). In a cucumber-frame.
15. physaroides, Fr. On dead wood, mosses, etc.
16. cinereum, Fr.; Batsch,/. 169. On various decaying substances.
17. serpula, Fr. On dead leaves.
76. PHYSARUM, P.
Peridium simple, membranaceous, very delicate, naked,
quite smooth, bursting irregularly. Columella none.
1. nutans. P., and y am-eum, Grev. t. 134. On decayed wood.
2. bulbiforme, Schum.; Fl. Dan. t. 1974./. 3. On rotten wood.
3. nibiginosnm, Ghev.; Fl. Par. p. 338. On bark, amongst moss.
4. Ulacinum, Fr. {no. 215). On decayed wood.
5. metalHcum, B. {no. 29, with a figure). On elder-sticks.
6. album, Fr.; Grev. t. 40. On dead leaves, etc.
7. atram, Fr. {no. 216). On fallen oak-branches, etc.
77. ANGIORIDIUM, Grev.
Peridium membranaceous, opening by a longitudinal fis-
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