Order XX. D EM A T IE I.
Threads free, rarely collected into stem-like bundles, more or
less corticated, and carbonized, as are frequently the simple or
septate spores.—Berlc. Outl.p. 342.
In the more typical species there is a distinct membrane, wbiob shells off,
and where this does not exist the threads are dark and dingy, but never
white, er of pure tints.—M. J . B.
Elooci united in a common stem.
Spores septate, dark, radiating
Spores simple, in a globose head
Eloooi free, simple.
With a vesicular head.
Spores simple, radiating .
Even, straight.
Spores 1-2 apical, subglobose .
Spores simple, moniliform, basal
Torulose.
Spores solitary, multioellular .
Thickened at tbe joints.
Spores fusiform . . . .
Spores bioonical, angular .
Thickened at the apex.
Spores curved, apical, in clusters
Moniliform.
Spores didymous
Plexuons.
Spores on sporangiform bodies .
Obscure or delicate.
Spores basal, mnlticellular
Flocci free, simple, or branched.
Spores concatenate, septate
Spores concatenate, simple
Spores in a globose head .
Spores septate, apical . -
Spores multiseptate, scattered .
Spores pedicellate
Spores triradiate
Spores flat, spiral . ■ •
Spores clavate, a t first spiral .
Flooci branched, flexnons.
Spores uniseptate_ .
Flocci branched, upper joints inflated
Spores septate . . . •
Flood with short, vertioellate branches.
Spores single . . . .
Flocci branched, tufted.
Spores globose, clustered .
Arthrohotrywm.
Periconia.
CEdoceplialum.
Monotospora.
Syorodum.
Mystrosporium.
Arthrinium,
Oonatosporium.
Carryptoum.
Polythrincmm.
(Edemium.
Macrosporium.
Pesndryphium.
crotheciiim.
_ tdminthospo',
Sepiosporium.
Triposporium.
Hdicoma.
Helicocoryne.
Gladosporium.
Clcbdotrkhwíí.
Stachyhotrys.
Cephalotrkhum.
Gen. 201. AR THRO BO TRYVM , Cesati.
Common stem composed of jointed
threads; spores large, radiating, so as
to form a little head, dark, septate.—
Berh. Outl.p. 342. {Fig. 236.)
1 6 8 5 . Azthrobotzyum atzum.
B . # B r . “ Black Arthrohotryum.”
Stem short; spores large, hyaline at
the extremities, unequally articulated.
— Ann. N . H. no. 822, t. 9 ,/. 6.
On dead nettle stems. Dec. Batheaston.
Fig. 236.
Minute, stem short, composed of simple, articulated threads, which are
swollen above, and terminate in subelliptic, very obtuse, unequally articulated
spores, which are dark in the centre and hyaline at the extremities,
(•001-’0015 in.) long, exclusive of the swollen base.—B. & Br. (Fig. 236.)
1 6 8 6 . Azthzobotzyum stilb o id eum . Ces. “ Dense-headed
Arthrohotryum.’ ’
Stem elongated; spores cylindrical, obtuse, three times as long
as broad, triseptate.—Gesati. Hedw. t. 4, / . 1. B. ^ Br. Ann.
N.H. no. 943. A.Broomii. Babh. exs. no. 65.
On pollard willows. April.
Spores "0005 in. long, forming a dense Stilhum-Vd^e head.
[A similar, if not identical, species has been found once on a piece of straw
from Norfolk, but the spores were only bi-nncleate, not septate, perhaps
immature.]
Gen. 20 2.
Fig. 237.
DENDR.YPHIVM, Corda.
Threads free, jointed, simple below,
branched above; branches and branchlets
often monilioid; spores septate, acroge-
nous, concatenated.—Berh. Outl.p. 342.
The spores in this genus sometimes form moniliform
threads, and sometimes exhibit the more
usual mode of growth in Septonema. (Fig- 237.)
1 6 8 7 . D en d zy p h ium c om o sum . Wallr.
“ Woolly Dendryphium.”
Tufts indeterminate, black; stem simple,
brown, moniliform above?; spore-bearing
threads radiating, simple, or branched, or