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Arcyria melanopcziza, Mass.
Sporangia sessile, creeping, sultercte, generally forming rings,
1— 2 mm. long, very hlaclc, scarcely or not at all shining, very
smooth; wall black, opaque, suhcellular, rather coriaceous,
splitting longitudinally and deiiisoing in a valvate manner;
capillitium yellow, protruded elastically, threads round, 4—5 g
thick, comhined into a loose net, everywhere covered with erect
spines, 5— 6 x 1 /a, spirals almost obsolete; spores clliptico-globose,
papilloso-scabrid, 10— 12 x 10 /i, yellow.
Hemitrichia melanopcziza, Spegazzini, Fung. Arg., Pug. IV.,
n. 268.
Hemiarcyria melanopcziza, Berlese, Sacc., Syll., vii., 1, n. 1520;
Mass., Rev. Trich., p. 356.
On hark. Brazil.
Looking exactly like some black Feziza.
Arcyria calyculata, Mass.
Sporangia simple, gregarious, stipitate, globose or elliptical,
dirty foxy-brown, 1— 2 mm. diameter; stem 3—5 mm. long,
200—250 g thick, round, glabrous, rather tough, apex dilated
into a little dimidiate cnp equal to the peridiiom, base dilated,
flbrillose, colour of the sporangium ; spores and capillitium dingy
yellowish-fulvous; elaters 7— 8 g thick, cylindrical, yellowish,
sparsely branched, free tips acute; spirals 3—5, fiat, not very
conspicuous, separated by interspaces their own width, spinulose ;
spores disooideo-lenticular, concavo-convex, margin murieulate,
10 s. 2 g diameter.
Hemiarcyria calyculata, Speg., Fung. Arg., Pug. 111., n. 92;
Sacc., Syll., n. 1518; Mass., Revis. Trich., p. 856.
On rotten willow trunk. Argentine Republic.
I t is very doubtful as to whether the spores in the normal
condition present the shape described by Spegazzini; the
spores of many species become concavo-convex when dry, but if
soaked for a sufficient length of time, assume the usual spherical
form.
Arcyria stipitata, Mass.
Sporangia pyriform, from 2—5 on a common stem, or solitary,
pale lemon-yellovj, opaque; stem elongated, equal, dark hrown
black, longitudinally rugulose; mass of capillitmm and spores
dingy ochre; capillitium dense, much branched and forming a
net without free tips, threads 4—5 g thick, spirals very open,
rather distant, thin, not prominent; spores globose, minutely
warted, 7— 8 g diameter.
a. genuina. Sporangia single on an elongated stem.
¡3. faseieulata. Sporangia fasciculate on a common stem.
Hernia,reyria stipitata, Mass., Rev. Trich., p. 354, fig. 32.
On palm stems. Java.
(Type in Herb. Berk., Kew.)
Scattered or aggregated, 3—4 mm. high, stem about 2 mm.
long, thin, hollow. Capillitium elastic, protruding after dehiscence.
Allied to Arcyria clavata, but distinct in the dense
capillitium without free tips, the loose spirals, and the long,
thin, black stem.
Arcyria Wigandii, Mass.
Sporangia clavate, discoid, or irregularly subrotund, very
small, almost sessile, mass of spores and capillitium bay or
flesh-colour, verging on yellow; elaters rarely branching, spirals
one or two, flexuous, either separated by interspaces from three to
fcncr times their own width, or crowded and ahnost forming rings,
tips scarcely narrowed, truncate and inflated; spores minutely
verruculose, 10—11 g diameter.
Hemiarcyria Wigandii, Rost,, Mon., p. 267, fig. 232; Sacc.,
Syll., vii., 1, no. 1517; Cooke, Myx. Brit., fig. 232; Mass., Rev.
Trich., p. 356.
Germany.
(Rostafinski’s Synonym.)
Trichia abietina, Wigd., 1. c., p. 33, t. 2, f. 11 (1863).