114 
FUNGI OF CALIFORNIA. 
stages of development ; e, threads of capillitium ; f, spores. 
Threads and spores to the same scale. 
Didezxna vernicosuxii. P. — Winter. San Francisco, U.S. No. 1 6. 
Didexxna granulatum. Pr.— Winter. San Francisco, U.S. 
No. 36. 
Diderma testaceum. So7irad . — Winter. San Francisco, U.S. 
No. 82. This specimen differs from the normal form in not being 
“ applanato-sessile,” but sessile or substipitate. 
Diderma albescens, n. s. — Sessile, spherical, contiguous or 
scattered ; peridium brittle, splitting irregularly, "whitish ; inner 
peridium obsolete ; columella white ; flocci abundant, purple-black, 
as well as the spores. 
Spo. ‘008 mm. ‘‘Agreeing with D. depressum^ in its unusually 
copious capillitium, but not in other points.” M. J. B. 
Pine bark. April. Blue Canon, Pacific Eailway, U.S. Nos. 
361 and 396. 
PI. 87, fig. 3, a, natural size; 5, c, magnified; c?, showing the 
columella ; 6,/, threads and spores magnified to the same scale. 
Diderma brunneolum. n. s. — Globose, sessile, scattered, rufous- 
brown ; outer peridium thick, fragile, splitting irregularly ; inner 
peridium white, evanescent ; columella none ; flocci white ; spores 
fuliginous. 
Spo. *012 mm. On oak bark. “ A very pretty distinct species.” 
M. J. B. San Francisco. Winter. No. 126. 
PI. 87, fig. 4, a, natural size ; c, cZ, different stages, magnified; 
e, fragment of thread ; f, spore magnified to same scale. 
Didymium cinereum. Fr. — Winter. San Francisco. Nos. 7 
and 37. 
Didymium squamulosum. A. ^ S. — On Arhor vitce. Winter. 
San Francisco. No. 58. 
Didymium granuliferum, n. s.— Applanato-sessile, contiguous, 
subglobose ; clothed with dirty cinerous granules ; columella small ; 
flocci abundant, black, as are the very large spores. 
Spo. •022-‘025 mm. On herbaceous stems. Blue Canon, 
Pacific Railway, U.S. No. 423. 
PI. 88, fig. 1, a, natural size ; h, c, in different stages, magnified ; 
d, section showing columella ; e, J, threads of capillitium and spores 
more highly magnified. 
Didymium glaucum, n. s. — Applanato-sessile, contiguous, glo- 
boso-depressed, or elongated, glauco-cinerious, scaly ; columella 
none; flocci white; spores minutely asperate, brownish- black. 
Spo. -01 mm. 
PI. 88, fig. 6, a, natural size; b, c, magnified; d, section of 
peridium ; e, spores more highly magnified. 
On dead sticks. San Francisco. No. 12. 
Physarum nutans P. var. aureum.— San Francisco. No. 99. 
