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On twigs, moss, &o. Brazil; Argentine Republic; Aiken,
S. Carolina.
Gregarious, lA—2 mm. bigb, having tlie habit of Fhysarum
Sclmmacheri, but readily distinguished by the absence of a
columella and the very irregular sporangia which is not due
to the coalescence of several individuals, as proved by tbe thin,
simple stem.
Tilmadoche reniformis, Mass. (n. sp.).
Gregarious; sporangia rei/i/orTO, deeply umbilicate below, sometimes
umbilicate above also, and then presenting a dumb-belllike
form, coating of lime white, often becoming cracked, stem
elongated, slender, erect, straight, tapering upwards, pale brown,
wrinkled, filled with granules of lime; capillitium rather scanty,
threads forming a very loose net, with scattered, fusiform swellings,
colourless or tinged yellow; spores globose, didl purple,
coarsely spinulose, 16—17 g diameter.
Ceylon.
(Type in Herb. Berk., Kew.)
On bark. Gregarious, rarely scattered, 2 mm. high. The
sporangium is sausage-shaped and curved, the stem entering
tbe concave side or umbilicus. This peculiarity, and more
especially the large, coarsely spinulose spores, characterize the
species,
Ceinkowskia, Rost,
Wall of sporangium single, containing lime, dehiscing irregularly;
capillitium attached at many points to wall of sporangium,
forming an irregular network having numerous free,
curved, pointed ends.
GcinJeowskia, Rost., Mon., p. 91; Cooke, Brit. Myx., p. 11;
Schroeter, p. 181 ; Sacc., Syll., vol. vii., pt. 1., p. 329.
Physarum, Alb. et Scbwz., p. 90.
Biderma, Fr., S. M., iii., p. 112.
Bidymium, Bischoff. Kryptogamenkunde, f. 361.
Very closely allied to the genus Physarum, differing only in
having some free ends to the network of the capillitium.
Bistrih. Europe ; United States. Species 1.
Ceinkowskia reticulata, Rost. (figs. 266, 267).
Plasmodiocarp elongated, sinuous or irregularly anastomosing,
wall rough witb lime, deep yellow, sometimes with a tinge of
brown; capillitium rather scanty, threads yellow, about 3 g
thick, forming an irregular net, loiih free, curved, pointed ends ;
here and there large, irregular, flattened nodes containing yellow
granules of lime are present; spores globose, dull violet, very
minutely verniculose, 8—10 g diameter.
Geinkowskia reticulata, Rost., Mon., p. 91, fig. 107; Cooke,
Myx. Brit., fig. 107 ; Schroeter, p. 131 ; Sacc., Syll., n. 1440.
On dead leaves and wood. Britain (Sibbertoft); Germany;
Sweden ; United States.
Usually forming an irregular network A—2 cm. across, dehiscing
irregularly. Tbe number of flattened, lime-containing
nodes varies considerably in different individuals, being sometimes
very numerous and originating mostly from the wall of
the sporangium. Closely resembling in habit and general
appearance Physarum gyrosum, Eost., a species not yet discovered
in Britain.
(Rostafinski’s Synonyms.)
Physarum retieulatum, Alb. and Sz., I.e., 251, t. 7, f. 2 (1805).
Diderma retieulatum, Fr., l.c., ill., 112 (1829).
Didymium retieulatum, Bischoff. Kryptogamenkunde, f. 361
(1842).
Leocaepus, Rost.
Wall of sporangium composed of two distinct layers, dehiscing
in an irregular manner ; capillitium attached at numerous points
to wall of sporangium, threads combined to form a dense,
irregular network with numerous nodes, many of which are
empty, the remainder large and filled with small granules of