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threads often forked at acute angles, anastomosing laterally,
hrownish-lilae, furnished here and there toith thichenings; spores
dusky violet, globose, with prominent, elongated, flexuous ridges,
8—11 g diameter.
“Didymium dealbatum, B. and C.,” in Herb. Berk., n. 10756.
Chond.rioderma subdictyospermum, Rost., Mon. Append., p. 16;
Sacc., Syll., n. 1260.
On wood, amongst moss. Venezuela.
A very fine and distinct species, sporangium pure white,
polished, about '5 mm. diameter. There appears to be no good
reason why Berkeley’s specific name, although only a manuscript
one, should have been changed by Rostafinski. The
description of the present species in Saocardo’s Sylloge is
meaningless.
(Rostafinski’s Synonym.)
Didymium dealbatum, B. msc.
Chondrioderma Friesianum, Rost.
Sporangia sessile, subhemispherioal, wall very much charged
witb lime, snow-white, after the crust has fallen away, grey;
columella distinct, lentioularly depressed, yellowisb-gilvous or
flesh-colour; capillitium well-developed, colourless, threads combined
to form a network; spores pale violet, 8 g diameter,
smooth.
Ghondrioderma Friesianum, in Fuokel’s Sym. Myo., 2, p. 74;
Rost., Mon., p. 172; Sacc., Syll, no. 1266.
On bark, stems, &c. Europe.
Distinguished from Ghondrioderma globosum by its irregular
form, by the inside of the sporangial wall subreticulate, and
the almost umber spores.
(Rostafinski’s Synonyms.)
Diderma difforme, Sommf., FI. Lap., p. 217; non P e rs; sed
Fr., S. M., iii., p. 106 (1825).
Ghondrioderma Friesianum, Rost., in Fuokel’s Symb. Myc., 2,
Nach., p. 74.
Chondrioderma albescens, Phil.
Sporangia globose or slightly depressed, sessile on a broad base>
outer wall crustaceous, white, polished, becoming irregularly
ruptured above, inner wall very thin, ochraceous towards base
of sporangium and where it passes over the columella, colourless
and very delicate above; columella well-developed, more
or less globose, ochraeeotis; mass of spores blackisb-purple;
threads of capillitium fuliginous or almost colourless, about
3 g thick at the base, remaining for some distance simple,
then branching at acute angles, towards the apices anastomosing
freely to form a dense, irregular n e t; spores globose, lilac-brown,
minutely verruculose, 10—13 g diameter.
Chondrioderma albescens, Phil., in Herb.
Diderma albescens, Phil., Grev., v., 5, p. 114, t. 87, f. 3, a—f;
Saco., Syll., 1291.
(Type in Herb. Phillips.)
On pine bark. California.
Gregarious, or towards the margin of the clusters, scattered,
1—I'O mm. diameter. After dehiscence, when the spores are
blown away, the bright ochraceous columella and base of
sporangium are very conspicuous. The threads of the capillitium
are sometimes furnished with scattered swollen portions.
Chondrioderma simulans, Rost.
Sporangia spherical, narrowed at the base, adnate to a well-
developed, chalk-white hypothallus composed mostly of lime,
outer wall crustaceous, ehcdk-ioliite, inner wall cinereous or
variously bright-coloured; columella generally very small, chalk-
white, spherical or conical; threads of capillitium forming a
dense net, witb triangular protuberances at the nodes, brownish-
violet; spores dingy violet, very spinulose, 12'o g diameter.
Ghondrioderma simulans, Rost., Mon. Append., p. 20; Sacc
Syll., 1279.
Chondrioderma Saundersii, B. and Br.
Sporangia scattered, sessile on a broad base, very much
p