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116
alboflava. Flocci capillitii tenerrimi, in reticulum densum
connexi, incolores, protuberantiis numerosis, niinutis praediti.
Sporae sublaeves, fusco-atrae, diam. 10—11 mmm.
Syn. Diderma effusum Link. Obs. II, p. 42. Didymium
effusum, Rostaf. Sluzowc. p. 163.
Hab. In foliis deciduis arborum frondosarum,
praeci-pue Bctulae, aestate et autumno.
8. D. sqvamulosum (Alb. et Schw.) Fr.. Syst. myc.
III, p. 118.
Sporangia stipitata, hemisphaerica, basi applanata et
umbilicata, superne demum frustulatim rumpentia, 1 mm
lata. Stipes sporangium inträns ibiqve in columellam
sphae-roideam, laevem, niveam expansus, logitudinaliter leviter
striatus, niveus, sporangium aeqvans. Flocci capillitii tenelli,
hyalini, e columella surgentes, angulis valde acutis ramosi.
Sporae laeves, fusco-atrae, diam. 8—10 mmm.
Syn. Reticidaria liemispliaerica Bull. Chanip. Franc. p. 93
pr p. Diderma sqvamulosum Al.b. ct Schw. Consp. Fung. nisk. t.
IV, f. 5. Didymium herbarum Fr. Syst. myc. III, p. 120. D.
sqvamulosum Rostaf. Sluzowc. p. 159, f. I’i8.
Hab. Ad folia decidua vel viva, aestate et autumno.
Var. ß. 1 e u c o p u s. Didymium leucopus Fr. Syst. myc.
III, p. 121.
Sporangia sphaeroidea, subtus leviter vel vix umbilicata,
non rumpentia, 0,3—0,5 mm. lata. Stipes brevis, rigidus,
alte striatus.
Hab. In truncis. E Fennia nobis non visum.
Var. y. costatum. Didymium costatum Fr. Syst. myc.
III, p. 118.
Sporangia irregulariter hemisphaerica vel lenticulari-
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