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202 A Monograph o f the Myxogastres.
thick, irregularly rugulose, expanding at the base into a small
bj'pothallus, pale oohraceous; columella cylindraceo-clavate, nearly
half the height of the qoorangium, smooth, pallid; mass of spores
blackish-violet; capillitium copious, threads dingy lilac, 3—3’5 g
thick at the base, tapering, branching irregularly and anastomosing
laterally, furnished with numerous elongated swellings
usually containing a few dark granules; spores globose, deep
violet, almost opaque, coarsely warted, 13—15 g diameter.
On thin decorticated twigs. Fort Colville, Canada. (Dr.
Lyall.)
(Type in Herb., Kew.)
From 1'3—2 mm. high, with the habit of Ghondrioderma
Oerstcdii, differing in the highly developed columella and irregular
mode of dehiscence.
Chondrioderma Carmichaeliannm, Cooke (figs. 245—247).
Sporangia spherical, quite sessile, splitting when mature into
4—5 acute segments, pale red, polished; columella spherical,
attenuated at the base, pale red ; threads of capillitium very thin,
colourless, branching in a diehotomous manner, here and there
laterally connected; spores globose, dark-violet, smooth, 11—13 g
diameter.
Ghondrioderma Garmichae'danum, Cooke, Myx. Brit., p. 42.
Ghondrioderma radiaium, Rost., Mon. Append., p. 40 (in
p a rt); Sacc., Syll., 1284 (in part).
Diderma Carmichaelianum, Berk., Eng. El., vol. v., p. 34;
Cooke, Hdbk., no. 1112.
(Type in Herb. Berk., Kew.)
On moss. Britain (Appin, N. B .; Trifreu, Wales).
Sporangia about ’o mm. diameter; distinguished from G.
radiatum in being sessile and globose, not umbilicate below,
and in the smooth spores.
Chondrioderma Trevelyana, Rost.
Sporangia ovate or subglobose, sessile, wall single, polished
ivory coloured, spditting half way to the base into numerous
narrow segments which become reflexed; columella white, minute;
mass of spores blackish-purple; capillitium dense, threads
colourless, 2—3 g thick, frequently forking at a wide angle,
and combined laterally to form a net, slightly thicker at the
point of bifurcation; spores globose, minutely verruculose, 12—14 g
diameter.
Leangium? Trevelyani, Grev., Scot. Cr. El., pi. 132.
Ghoiulrioderma Trevelyana, Rost., Mon., p. 182, figs. 161—163;
Cooke, Brit. Myx., p. 40, figs. 161—163; Sacc., Syll., n. 1289.
In the Appendix to Rostafinski’s Monograph, the present
species is referred as a synonym to Ghondrioderma radiatum.
On living leaves of Bryum ligulatum. Britain (Northumberland).
Sporangia scattered ; 1—15 mm. diameter before dehiscence.
The above description is drawn up from a specimen originally
in Sowerby’s Herbarium, and now in the Berkeley Herbarium,
Kew, and said to be from Greville. I t is certainly quite
distinct from G. radiatum, in the greater number of segments
(14_ 16) into which the sporangial wall splits, the colourless
capillitium, and larger spores.
(Rostafinski’s Synonyms.)
Leangium (?) Trevelyani, Grev., Soot. Cr. El., t. 132 (1825).
Gionium Trevelyani, Spr., Syst., iv., 529 (1827).
Diderma Trevelyani, Fr., S. M., iii., 105 (1829); Eng. FL, v.,
311; Cooke. Hdbk., No. 1111.
Polyschismmm Trevelyani, Corda, Icon., v., p. 20 (1842).
B. Columella absent.
Chondrioderma Oerstedtii, Rost. (figs. 87, 88).
Sporangia stipitate, subglobose or broadly pyriform, when
mature splitting in a stellate manner into 4—6 irregular, acute
segments, pallid; stem short, usually darker than sporangium ;
columella entirely absent; threads of capillitium colourless or
dirty-lilac, combined to form a net, often furnished witb darker