f i I
(i
tlJ I
liii I
Didymmm squamulosum, which differs in the large, white
columella. Distinguished from sessile forms of Physarum leu-
cophamm, by the coarser capillitium furnished with numerous
large nodes, and tbe slightly larger and more coarsely warted
spores.
(Rostafinski’s Synonyms.)
Didymium Imeoptis, Link, Diss., 2, p. 42 (1809).
Physarum hidlatum. Link, Diss., 2, p. 42 (1809); Ditmar,
t. 22.
Physarum albopunctakom. Link, Herb.
Didymium leiKopics, Fr., S. M., iii., 121 (1829); Engl. FL, v.,
p. 313; Cke., Hdbk., n, 1127.
Physarum ramentaceum, Fr., in litt. ad Wein (1836).
Physarum leucophaeum, Fr. (figs. 63—66 and 96).
Sporangia subglobose, usually a little depressed below, stipitate
or sessile, wall thin, witb irregular, white, innate patches of
lime, dehiscing irregularly; stem usually longer than the sporangium,
erect, slightly attenuated upwards, longitudinally rugulose,
hroion, paler above, passing into a dark hypothallus; capillitium
dense, colourless, anastomosing very irregularly, threads
thin, often flattened at the angles which rarely contain lime;
spores globose, dingy lilac, minutely warted, 8—10 g diameter.
/ . fascicidatum. Stems confluent.
/ . sessile. Stem very short or entirely absent, sporangia
scattered or confluent, regular or sometimes elongated and
anastomosing.
Physarum leucophaeum, Fr., Symb. Gast., p. 24; Rost., Mon.,
p. 113, figs. 77, 78, and 89; Cooke, Myx. Brit., p. 16, figs. 77
78, and 89; Sacc., Syll., n. 1192; Schroeter, 129; Raunk., Myx.
Dan., p. 75.
Didymium pruinosum, B. and C., Cuban Fungi, n. 530.
(Type in Herb. Berk.)
On leaves, twigs, bark, moss, &c. Britain (Queen’s Cottage
grounds, Kew; Hampstead, Bristol, Deal, Scarboro’, Carlisle,
289
Edinburgh); France; Germany; Italy; Hungary; Denmark;
S. Africa; Australia.
About 1'5 mm. h ig h ; stem, when perfect, dingy brown, slightly
attenuated upwards; the sessile and irregular forms are distinguished
from Physarum cinereum by the dense, irregular
capillitmm having most of the angles flattened and rarely
containing lime.
Var. molascens, Rost. Sporangium subglobose or compressed,
wall tbin, iridescent, with violet or reddish tints, with very few
small, innate patches of lime, or these may be entirely absent;
stem short or equal to sporangium, stout, expanding at the
base into a small hypothallus, yellowish, darker below, strongly
wrinkled longitudinally; capillitium and spores as in the type.
Physarum leucophaeum, ¡3. violascens, Rost., Mon., p. 113;
Cke., Myx. Brit., p. 15.
On moss. Epping Forest.
(Rostafinski’s Synonyms.)
Sphaerocarpiis albus, Bull., p. 136, var. 3, 4 (1791).
Trichia filarnentosa, Trent., p. 227 (1797).
Physarum coufluens. Link, Diss., ii., 42 (1809).
Physarum connexum. Link, Diss., ii., 42 (1809).
Physarum hypnorimi, Link, Diss., ii., 42 (1809).
Physarum albopunetatum. Link, Herb.
Physarum clavus, Ehr., Herb.
Physarum conglobatum, Ditm., t. 40 (1817). ,
Physarum leucophaeum, Fr., Sym. Gast., p. 24; Syst. Myo.,
iii., 132 (1818); Cooke, Fung. Brit., ii., n. 519.
Didymium melanopus, ¡3. clavus, Wallr., non Fries (1833).
Didymium terrestre, Fr., in Weinm. (1836).
Physarum albipes, De Bary, not Link (1859).
Physarum striatum, Fckl., Sym. Myo., 342 (1869).
Didymium hemispherieum, Fckl., Sym. Myo., 341 (18,69).
Physarum granulatum, Balf. fil. (figs. 68—70).
Sporangia stipitate, globose, sometimes slightly flattened
below, grey, witb small innate granules of lime, and having in