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ing under the weight of the sporangium; columella absent;
mass of spores blackisli-purple; capillitium copious, threads
colourless, 8—4 g thick, branching at wide angles and anastomosing
irregularly; spores globose, smooth, dingy lilac, 9—10 g
diameter.
Bidymium australis, Mass., Grev., vol. xvii., p. 7.
(Type in Herb., Kew.)
Gregarious, on an old decayed species of Auricularia.
Brisbane, Australia.
Plant about 2 mm. high, stem equal or a little longer than
sporangium. Resembling Didymium squamulosum, in the wall
of tbe sporangium breaking up into large detached patches,
but readily distinguished by the absence of a columella, and tbe
thin, coloured stem.
Didymium proximum, B. and C. (figs. 227—229).
Sporangium globose, white or pallid, sprinkled with lime,
mostly in the farm of stellate crystals; stem more or less longitudinally
wrinkled, subequal, rufaiis, erect, expanding at the
base into a small hypothallus; columella subclavaie, whitish,
reaching one-third the height of tbe sporangium; capillitium
dense, threads colourless, sometimes rough with projecting
granules; 3—4 mm. thick at the base, bifurcating and anastomosing
laterally to form an irregular reticulation, often dilated
and flattened at the axils; spores globose, pale dirty lilac,
smooth, 0— 12 g diameter.
Didymium proxiimcm, B. and 0., Grev., vol, ii., p. .52 (1873);
Rost., Mon. App., p. 23 ; Sacc., Syll., no. 1308,
Didymium qmsillum, B. and C., Grev., ii., p. 33.
On dead pine leaves and on herbaceous stems. Carolina.
(Types in Herb. Berk., nos. 10760 and 10764.)
Scattered, 2—2’5 mm. high, columella large, usually more or
less clavate, sometimes irregularly fusiform. Owing to a slip
of tbe pen, Berkeley says, in describing D. pusillum, “ columella
nulla,” yet the large columella is shown in Berkeley’s sketch,
and the type specimen is identical with that of D. proximum.
Spores smooth, or with sometimes the slightest suggestion of
granulation under a ^5. objective.
Didymium pezizoideum, Mass.
Sporangia stipitate, discoid, pezizaeform, greyish-white, wall
single, becoming furfuraceous; stem subulate, curved above,
brownisb, smooth, expanding at the base into a small, shining,
closely adnate hypothallus ; threads of the capillitium combined
to form a net, spores smooth, violet, 8—9 g diameter.
Trichamphora pezizoidea, Jungh., FI. Cr., Java, p. 12, t. 2, f. 9.
Chondriodermaqjczizoideum, Rost., Mon., p. 424, f 122 ; Cooke,
Myx. Brit, fig. 12 2 ; Saco., Syll., 1256.
On rotten trunks. Java.
Didymium platypus, Hanzl.
Greyish-white, primrose, sporangia scattered, convex above,
deeply umbilicate below; stem cylindrical, dilated in a discoid
■manner at the apex; spores globose, smooth, blackish, 8 g diam.,
capillitium scanty, formed of black tubes connected in a reticulate
manner, columella absent.
Hanzl. Ein neue Myxog. typus in Just. Bot. Jabresbericbt,
1872, p. 155 ; Saoc., Syll., 1326.
Agaricus platypus, Bischoff (sec. Hanzl.).
On putrid plant stems. Hungary.
* * Sqwres warted.
Didymium echinospora, Mass. (n. sp.).
Sporangia globose, usually witb a shallow umbilicus below,
wall membranaceous, almost colourless, with a dense coat of
white amorphous particles of lime, upper portion breaking away
in flakes during dehiscence, and leaving a permanent eup-lihe
basal portion with torn edges; stem elongated, slender, erect,
very slightly attenuated upwards, iu/wig, rugulose below; columella
absent; capillitium very dense, threads lilac-brown, about
2 g thick, bifurcating, and towards the apex freely anastomosing