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II
(Type in ilerk. Berk., Kew, n. 10852.)
Oil bark. Ceylon.
Resembling in many respects Ophiotheca vermieularis, but
distinguished by the very minute, scattered warts on the spores.
Ophiotheca cano-flaveseens, Mass.
Sporangia gregarious, standing on a thin, yellow-grey hypothallus,
globose to hemispherical, or lengthened to reniform,
sessile, -5 mm. broad, bright yellow-grey, splitting more or less
regularly with a lid. The wall contains numerous round or
angular particles. The upper part of the wall, on its inner
side, provided with delicate thickenings combined into a regular
network; meshes of the network 5—6-gonal and 12 g diameter.
Capillitium scarcely evident, only consisting of a few, slightly-
branched or quite unbranched threads of variable width, un-
equally warted, colourless, yellowish; without regard to the
thickenings the tubes are 1'5— 2 g broad.
Spores golden-yellow, delicately warted, 12'5—14 g diameter.
Perichaena cano-flavescens, Raunkier, Myx. Dan,, p. 107, t. 2,
fig. 10.
On bark of beech. Denmark (Lolland).
Ophiotheca vermieularis, Mass. (figs. 198, 198 n).
Sporangia circular, irregularly lobed, or venulose and anastomosing
to form an irregular network; when the sporangia are
circular or simply lohed there is usually a well-defined, upraised
marginal portion, wall smooth with masses of lime inside,
varying from flesh-colour, through brown to umber; mass of
capillitium and spores flesh-colour or bright-yellow; capillitium
well-developed, attached at numerous points to wall of sporangium,
combined to form a loose, irregular net, threads 3—4 g
diameter, equally covered, vjith numercms short, straight or curved,
smictimes branched, raised bands; sometimes a few rounded warts
are intermixed, these latter now and again run out with
prominent spines; spores globose, densely and thickly covered
with small, depjressed warts, 10—13 g diameter.
Physarum vcrmieulare, Sz., Syn. Fung. Amer., n. 2296
(Specimen from Schweinitz in Herb. Berk., Kew.)
Perichaena vermieularis, Rost., Mon. App., p. 34; Sacc., Syll.,
^Z lh Z th c c a umbrina, B. and C., Grev., vol. ii., p. 6® (1873).
(Type in Herb. Berk., Kew.) {Not Perichaena vanabihs, Rost..
Mon., p. 295 ; Sacc., Syll, n. 1440.) _
Perichaena artocreas, B. and Rav., Grev., v. ii., p. 68 (18/3).
(Type in Herb. Berk., Kew).
Perichaena cortiealis, Rost., Mon., p. 293 (in p a rt); Sacc., Syll,
n. 1435 (in p a rt); Cke., Myx. Brit., p. 73 (in part)
Perichaena Friesiana, Rost., Mon., 296; Sacc., Syll, n. 1441.
On rotten wood and bark. United States.
In Schweinitz’s specimen there is a clear transition shown
from normal perithecia to the venulose, reticulate plasmodiocarp
In the noii-venulose form the margin is uniformly raised all
round. The threads covered with short raised hands, looking
like warts under a low power, and the spores densely covered
with depressed warts are very characteristic.
Ophiotheca anómala, Mass.
Sporangia scattered or gregarious, sessile, suh-sphaeroid, dingy-
ochraoeous, rather shilling, about 1'5 mm. diameter; threads of
the capillitium 4— 6 g thick, cylindrical, ends numerous, trunccde
often terminated by clavately swollen tips, with croiodcd raisec
bands arranged as circles; spores globose, smooth, dingy-ochra-
ceous, under the microscope very pale tinge of yellow, 6—7 g
diameter. a a n
Gornuvia anómala, Karst., Myo. Fenn., 4, p. 131; Sacc., Syll.,
vii., 1, 1455.
Trichia anómala, Karst., Not. Sallsk. pro Faun, et Flor. Fenn.,
ix. (1868), p. 354.
Ophiotheca serpula, Mass.
Plasmodium venulose, yellow; mass of spores and capillitium
golden-yellow; capillitium threads cylindrical, 3'3 g thick, with
dil
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