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becomes Irrohen upj into large, irregular, persistent patches; mass
of spores brownisb-black; stem white, equal in length to sporangium
or much shorter, slightly rugulose; columella %ohite or
dirty oehraceoms, large, stobglohose; threads of capillitium pale
or colourless, about equal throughout their length, 2—3 g thick,
branching at acute angles and connected laterally, forming a
net, sometimes flexuous; spores globose, dingy violet, mimitely
verrucose, 8—11 g diameter.
Didymium hypnophilum, Mass., Joum. K. Micr. Soc., v., 5.
p. 757.
Didymium neglectum. Berk., Linn. Soc. Journ., v., 14, p. 83;
Sacc., 1325.
a. genuinum. Sporangia stipitate, stem elongated or short,
and almost lost in tbe umbilicus of the sporangium.
S- sessilis. Sporangia sessile, distinct, or sometimes several
confluent, when the columella becomes elongated.
Didymium squamulosum, var. genuinum, Rost., Mon., p. 159,
f 148; Cooke, Myx. Brit, p. 33, f. 148; Schroeter, p. 122;
Rannk., p. 88; Saoc., Syll., 1301.
Exsicc.—Syd., Myc. March., 1887, 1388; Cke., Fung. Brit.,
Ed. 11., 613; Rab., Fung. Eur., 813; Rab.-Wint, Fung. Eur,,
2969; Roum., Fung. Gall, 1212; Fuckel, Fung. Rhen., 2497;
Syd., Myc. March,, 396 (as Didymium farinaceum'); and 492 (as
Didymmm lierbarum, Fr.); Ellis, N. Amer. Fung., 1216; Roum.,
Fung. Gall., 1684 (as Didymium farinaceum'); Klotzsch (Rab.),
Herb. Myc., 455 (as Didymium hemisphericim).
On rotten wood, leaves, moss, &c.
About 1 mm. high, distinguished by tbe calcareous crust of
tbe sporangium becoming broken up into large irregular patches,
separated from each other by the blackish inner layer and tbe
pale columella. Most closely allied to Didymmm virgineum.
For distinctive characters see under the latter.
Britain (Kew, Wothorpe, King’s Cliffe, Norwich, Scarboro’,
Carlisle, Glamis, Appin, N. B.); France; Ita ly ; Germany;
Switzerland; Belgium; U. S t a t e sC u b a ; Ceylon; Australia;
Tasmania; New Zealand.
Var. eostatum, Mass.
Sporangia covered uniformly with minute particles of lime,
not becoming broken up into large, distinct patches; stem white,
variable in length, expanding at the base into a small hypothallus
with prominent radiating ridges. Stem sometimes very
short, sunk in the umbilicus or entirely absent.
Didymium squamulosum, ¡3. leucopus, y. eostatum, Rost., Mon.,
p. 159; Cooke, Myx. Brit., p. 33; Saco., Syll, no. 1301.
Exsicc.—Rab., Fung. Eur., 367 (as Didymium praecox, De
Bary); Fuckel, Fung. Rhen., 2690 (as Didymium squamulosum
y. eostatum); Rab.-Wint., Fung. Eur., 2675 (as Didymium Nea-
politanum, Ces.).
On leaves, wood, &c.
Distinguished from the type by the white crust of the pileus
not becoming broken up into patches, and by the markedly
costate hypothallus. Somewhat resembling Didymium depressum,
Fr., which however is readily distinguished by the much
larger and more coarsely warted spores.
Britain (Epping Forest, Chiselhurst, Kew, Carlisle); France;
Germany; Austria.
(Rostafinski’s Synonyms.)
Reticularia hemispherica, Bull, p. 93 (1791).
Diderma squamulosum, A. and S., t. 4, f 5 (1805).
Didymium globosum, v. stipitatum, Schwarz., Ao. Holm., p.
114 (1815).
Licea stipitata, D. C., El. Fr., No. 670 (1815).
Tubulina pedicellata, Poir., Ency., v., p. 373.
Gionium farinaceum, Spr., Syst., iv., 528 (1827).
Didymium- herharum, Fr., S, M., iii., 120 (1829).
Didymium leucopus, Fr., S. M., iii,, 121 (1829); Cooke, Hdbk.,
No. 1127.
Didymium eostatum, Fr., S. M., iii., 118 (1829).
Didymkim liceoides, Duby, Bot. Gall, ii., 864 (1830).
Didymium flamentosum, Wallr., FI. Germ,, No. 2187 (1833).