1 7 2 9 . Helminthosporium r e tic u la tum . Coohe. “ Eeticulate
Helminthosporium.”
Forming dendritic and reticulated patches on both surfaces
of the leaves, orbicular or irregular ; flocci slender, flexuous,
generally simple; spores elliptical, obtuse, triseptate.—Coolce.
exs. no. 360.
On dead leaves of ash. Dec.
This species has more the appearance of an Asteroma than an Helminthos-
porium to the naked eye. In habit, at least, it is very distinct.
Gen. 21 2 . MACROSPORIUM, Fries.
Flocci obscure or delicate ; spores
erect, basal, pedicellate, with at length
transverse and vertical septa.—Berh.
Outl. p. 345. Eng FI. Y.p . 339.
{Fig. 247.)
1730 M a c ro sp o iium ch e iz au thi. Fr. “ Common Macrosporium.”
Flocci decumbent, extremely fugacious ; sporidia pyriform,
articulato-septate, black; peduncle short.— F r . S .M .i i i . p . 374.
E n g . F I . y . p . 339.
On damp paper, decaying plants, &c. [United States.]
var. (3. b e tæ . Coohe. Spores scarcely coloured.—Coohe exs.
no. 197. M a c ro sp o rium commune. Babh. F .E . n o .1869.
On leaves of beet.
The sporidia vary extremely in form, some are clavate, with a single row
of articulations, in others the two or three upper cells have a vertical septum
; others are broadly clavate, and others again obovate, each articulation
divided by vertical partitions into many cells. All are more or less constricted.
The flocci are very delicate, and difficult to detect, though certainly
present. The peduncles vary in length ; more than one are sometimes
given off by the same thread of the mycelium.—M. J . B. Probably a condition
of Sphceria herharum.
1731. Maczospozium sa z c in u la .
porium.”
Berh. “ Gourd Macros-
Flocci suberect, delicate, fugacious, slightly branched; spores
clavate, at length subrectangular, multiseptate, constricted,
variable.—Berh. Ann. N.H. no. 125, t. 8 ,/. 10.
On decaying orange gourds. King’s Cliffe.
Its first appearance is that of orbicular white downy patches, consisting
of suberect slightly branched threads. These soon vanish, leaving a dark-
olive green stratum, consisting at flrst of short clavate filaments, witb one
or two septa. Their apices gradually become much incrassated, and the
number of articulations increases. The septa are mostly horizontal, with a
few vertical ones ¡ a few occasionally are inclined. In this state the colour
is yellowish when viewed by transmitted light. The spores gradually assume
a browner tint, become more and more distinct from the peduncle, and
at length fall off, acquiring a rectangular outline, resembling very much little
corded bales, from which circumstance the name is taken. They vary
greatly in size, and in the number of cells. A few of the peduncles are seen
amongst the spores, their articulations being frequently swollen above.—
M. J .B .
See also Sphceria herbartim, of which this is a conidiophorous condition.
1 7 3 2 . Maczospozium concinnum. Berh. “ Powdery
Macrosporium.”
Spots pulverulent, velvety, black ; flocci flexuous, articulated,
brown ; spores obovate, pedicellate, at length oblong.—Berh. Ann.
N.H. no. 235,1.12, f . 21. Helminthosporium strioeforme. Corda.
On decorticated osier twigs of an old hamper. Sept. Apethorpe.
Spots elongated, black ; flocci minute, waved, brown below, pellucid
above, often with the rudiment of a branch at the apex ; spores obovate,
with about three principal dissepiments, which are divided vertically or
obliquely, furnished with a very short pellucid peduncle. This peduncle at
length vanishes, and they lose their obovate form and become oblong.—
M. J .B . (Ky. 247.)
1733. Maczospozium bz a ssicæ .
porium.”
Berh. “ Cabbage Maoros-
Flocoi obsolete, sporidia clavate, antennseform, 5-11 septate,
rather longer than the peduncle.—Eng. El. Y.p . 339.
On decaying cabbage leaves. King’s Cliffe.
Intermixed with Cladosporium herharum, of which it is probably a condition.
1 7 3 4 . Maczospozium hetezonemum. Besm. “ Arrow-head
Macrosporium.”
Flocci erect, septate, of two forms, distinctly united in small
fascicles; spores large, pedicellate, oblong-clavate, tawny, with
the endochrome divided transversely, and here and there longitudinally,
into numerous cells; pedicels hyaline.—Ann. des Sc.
Nat. 1853, XX. p. 216. Desm. exs. ed. ii. no. 7. Coohe Seem. Journ.
Bot.
f