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umbilicate below, -white, sprinkled with minute particles of
lime; stem elongated, slender, equcd, straight, pale yelloio, longitudinally
wrinkled, filled witb particles of lime, expanding at
the base into a minute circular hypothallus; capillitium rather
dense, threads everywhere equal, about 3 g thick, combined to
form a loose, irregular network, nodes very rarely slightly incrassated,
and containing a few minute, colourless granules of
lime; spores globose, dirty lilac, smooth, 10 g diameter.
On wood. Venezuela.
An apparently very distinct species, remarkable for the almost
total absence of thickened nodes or swollen interstitial portions
of the capillitium tubes, hence approaching the section Hemididymium
of Didymium. From 3—3'5 mm. high.
Tilmadoche ohlonga, Eost.
Scattered or gregarious, stipitate; sporangia cylindrical, obtuse
at both ends, apex broadly and deeply umbilicate, tawny-olive,
sprinkled with pale particles of lime; stem elongated, slender,
becoming thinner upwards, straight, or usually more or less
curved near tbe apex, reddish or yellow-brown, more or less
longitudinally wrinkled, filled witb minute particles of lime;
capillitium well developed, threads colourless, thin, with scattered,
small, interstitial, fusiform swellings containing colourless
or yellowish granules of lime, angles of bifurcation not incrassated;
spores dingy lilac, globose, minutely verruculose,
7—9 g diameter.
Tilmadoche oblonga, Rost., Mon. App., p. 13; Sacc., Syll., vii.,
1, n. 1250.
Trichamphora oblonga, Berk, and Curtis, Grev., vol. ii., p. 66 ;
N. Amer. Fung., n. 360.
(Type specimen in Herb. Berk., Kew, n. 10,917.)
Physarella mirabilis, Peck, Bull., Torr. Bot. Club., vol. ix.,
p. .61, pi. 24, figs. 1—6 (wretched figures); Rev. Myc., 1882,
p. 172, tab. xxix., fig. 5 (after Peck’s figures); Sacc., Syll,, vii.,
1, n. 1227.
Exsiee.—Ellis, N. Amer. Fung., n. 1212,
On wood, leaves, &c. United States.
iy
About 2 mm. high, stem straight or curved, thin, sporangium
typically cylindric-oblong, broadly and deeply umbilicate at tbe
apex; there is no trace of a columella. The present species
appears to be inclined to sport. Mr. Harold Wingate, of
Philadelphia, has sent me a fine series of forms of tbe present
species passing from the typical form described above to specimens
that are much larger, with a shorter, thicker, red stem,
which is in some instances branched and bearing 3—5 sporangia.
These vary in form from the typical condition, through oyathiform
to broadly funnel-shaped, witb a recurved, often flexuous
margin, externally reddish-brown, internally orange-yellow; in
these forms tbe umbilicus has become so deeply depressed that
the cavity of the sporangium is almost obliterated. It is the
inner depressed apical portion of the sporangium that Peck
describes as a spurious, hollow columella; he has obviously
formed the genus Physarella from an abnormal condition of the
present species.
Tilmadoche gyrocephala, Rost.
Sporangia irregularly lobed cn- lacunose, often compressed and
umbilicate below, stipitate, wall tbin, covered with irregular
yellow or greenish-ijellow scales of lime; stem elongated, tapering
upwards, weak and often curved, irregularly rugulose, passing
downwards into a tbin, wrinkled hypothallus, bright yellow or
orange; columella absent; capillitium well developed, forming a
loose net, nodes elongated, filled with yellow granules of lime,
internodes long, tbin; spores globose, minutely warted, dingy,
lilac, 7—9 g diameter.
Didymium gyrocephalum, Mont., Ann. Sci. Nat., Ser. II.
vol. viii., p. 362; Mont., Syll., n. 1073.
Tilmadoche gyrocephala (Mont.), Rost., Mon., p. 131; Sacc.,
Syll., vol. vii., pt. I,, 11. 1248; Mass., Journ. Myc., vol. v p 187
t. 14, f. 8 (1889).
Gribraria staminiformis, Speg., Fung. Arg., Pug. II., n. 109.
Exsicc.—Rav., Fung. Amer., n. 477 (as Physarum Sehumacheri,
Spr.),
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