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with granules of lime, the internodes thin and without lime;
dehiscence irregular, or hy a longitudinal fissure iu tbe plasmodiocarp
form.
Fhysarum, Pers.
Eost., Mon., p. 93; Cke., Brit. Myx., p. 11; Saoc., Syll., vii.,
p. 336 ; Zopf, p. 144.
The principal characteristic of the present genus is the
presence of numerous large, irregularly swollen nodes, or points
of junction of capillitium threads, filled with granules of lime,
tbe internodes, or threads connecting tbe nodes, being thin and
free from lime. Fhysarum passes by numerous transitional
forms into Tilmadoche, which in tbe typical condition differs
in the much fewer and smaller lime-containing nodes of the
capillitium.
Distrih. Europe; Africa; Himalayas; Ceylon; Java; Japan;
W. Australia; N. Zealand ; Tasmania; S. America; W. Indies;
U. States. Species, 70.
A. Spm-angia stipitate. (Some species included in the
present section have sessile forms.)
* Epispore warted.
Physarum psittacinum, Ditm. (figs. 290, 291).
Scattered, gregarious, or fasciculate, sporangia stipitate,
globose, slightly rugulose, lime scanty, green, often witb orange
and deep violet tin ts ; stem elongated, subequal or attenuated
upwards, expanding at tbe base into a small hypothallus, longitudinally
rugulose, orange-red; capillitium abundant, consisting
of irregularly anastomosing, rather thin threads, connecting
numerous large irregular nodes filled with lime, either colourless
m- usually some shade of orange; columella absent; spores
globose, hrownish-purple, very minutely verruculose, 7 9 g
diameter.
Physarum psiitaeinum, Ditm., Sturm, t. 62; Rost., Mon., p.
104, figs. 75, 76; Cooke, Brit. Myx., figs. 75, 76; Sacc., Syll,
n. 1179 (Excl. Syn. Didymium; Ravenslii, B. and C.); Raunk.,
Myx. Dan., p. 74.
Didymium erythrinum, Cke., Grev., 1873.
On bark, &c. Britain (Neatisbead, Norths); Germany;
Sweden; France; Italy; Denmark.
Distinguished amongst the red-stemmed species by the green
sporangium, and the capillitium consisting of thin, elongated
internodes, some of the nodes are flattened, with one or more
perforations and contain no lime, numerous others are filled
with lime which is usually tinged orange; from 2—2'o mm.
high.
Care must be taken not to confound the present species with
tbe green forms of Tilmadoche mutabilis.
(Rostafinski’s Synonym.)
Physarum psittacinum, Ditm., I.e., t. 62 (1817).
Physarum Sehumacheri, Rost. (figs. 287, 288).
Scattered or gregarious; sporangia globose, stipitate, warted
with grauules of lime, yellowish-olive, often with a tinge of
green; stem erect, subequal, usually longer than the sporangium,
filled with lime, longitudinally rugulose, expanding at
the base into a small hypothallus, pale yellow; columella
cylindrical, whitish; capillitium dense, forming an irregular net,
with numerous rather small knots containing yellowish granules
o f lime; spores globose, dull violet, minutely verrueidose, 7—9 g
diameter.
Physarum Sehumacheri, Rost., Mon., 99; Cke., Myx. Brit.,
p. 11; Raunk., Myx. Dan., p. 74.
Physarum, citrinum, Saco., Syll., n. 1176.
Physarum ehrysopeplum, B. and C., in Herb.
Exsicc.— FWis, N. Amer. Fung., n. 1395.
On bark, leaves, &o. Britain (Neatisbead, Carlisle); Ger-
many; Ita ly ; Finland ; Ceylon ; United States; 3. America.
About 2 mm. high. Capillitium dense, rather flaccid, internodes
long, thin, many of the angles flattened and not contain-
ing lime, others irregularly branched and filled with yellow
granules; columella prominent. The above description applies