il
mKH '
h! ;
i l :
combine tbe two, as tbe present species appears to differ iu tbe
absence of a liypotballus.
Didymium Weinmauni, Fr.
Sporangia turbinate, very fragile, covered witb grey meal,
stem short, with a yellow tinge, columella absent; spores
blackish.
Didymium Weinmauni, Fr., S. M,, iii., p. 121; Sacc., Syll.,
n. 1331.
On living herbaceous stems. Russia.
Minute, closely gregarious, and often arranged in lines; stem
equal, expanded at the base; sporangia membranaceous, oblong
or pyriform, covered witb grey meal. (Fr.)
Didymium humile, Hanzl.
Sporangia applanate, grey, pruinose, apex slightly, below
deeply umbilicate; stem cylindrical, brown, short; capillitium
of simple, tortuous, smooth, brown threads; spores brown, 6—7 g
diameter.
Hanzl. Ein neue Myx. types, in Just. Bot. Jahresb., 1872,
p. 15.5; Saco., Syll., 1324.
Hungary.
Didymium fulvipes, Er.
Stem compressed, sulcate, foxy-vermilion; sporangium globose,
delicately villose, grey.
Didymium fulvipes, Fr., Stirp. Femsj., p. 83 ; Fr., Gast., p. 24;
Sacc., Syll., 1323.
Sweden.
Stem and hypothallus resembling those of Hemiarcyria rubiformis,
very unequal, compressed, subconfluent, longitudinally
sulcato-rugose, 2 mm. and more in length; sporangium globose,
or slightly depressed, obtuse, often confluent, with a very
delicate grey villose covering; columella absent; threads brown.
(Fr.)
The villose covering of the sporangium alluded to by Fries
would in all probability consist of a very subtle coating of a
pulverulent nature.
Didymium versipelle, Fr.
Sporangia lenticular, umbilicate below, at first white, pruinose,
becoming polished, chestnut, stem conical, rugose, pallid fulvous;
columella brown ; spores smoky-black.
Didymmm versipelle, Fr., Syst. Myo., iii., p. 117; Sacc., 1330.
Sweden.
Stem about 2 mm. long, conical, wrinkled, sporangium depressed,
umbilicate, wall thin, whitish-pruinose, then naked and
shining, chestnut, dehiscing by a longitudinal fissure like a
bivalve; columella large, globose, brown. (Fr.)
Didymium Fairmani, Sacc.
Sporangia scattered, sessile, with stellate crystals; columella
subglobose, brownisb; threads of capillitium hyaline, forming a,
loose reticulation; spores smooth, 8—10 g.
Didymium Fairmani, Sacc., Journ. Myc., vol. v., p. 180; I.e.,
vol. V., p. 78.
On leaves of Smilacina bifolia. Syndonville, Orleans County,
N. Y.
The diagnosis is altogether inadequate, and it is much to be
regretted that the seventeenth century style of description
should be resuscitated at the present day. Professor Saocardo’s
description is thoroughly bad, inasmuch as it does not describe
anything.
Didymium erythrinum, Berk.
Stem equal, vermilion, as is the globose sporangium, spores
black, flocci white.
Berk., Grev., vol. ii., p. 62; Sacc., Syll., 1322.
Tbe pulverulent matter with which tbe peridium is clothed
soon rubs off.
As there is no specimen of the above species in Berkeley’s
Herbarium, I am unable to add to the above meagre description.
Didymium angulatum. Peck.
Sporangia delicate, subglobose, whitish, externally mealy
witb numerous grauules and crystals of lime; stem short,