Annual Report of the State Botanist 1892 - MykoWeb

34
Report of the State Botanist.
gated into a minute head, globose, .UOUl to .00012 in. broad,
colored like but paler than the liyphse.
On a thick stratum of mycelium of some wood inhabiting
fungus. Adirondack mountains. July.
Zygodesmus fulvus Sacc.
Decaying bark of maple, Acer saccharinu7i%. Lake Pleasant
August.
Cladospormm Zese n. sp.
Mycelial filaments colorless, branched, ci'eepi^- among the
tissues of the matrix and causing the epidermis to rjipture ; fertile
hyphae slender, sparingly septate, more or less elongate ; densely
interwoven and forming a grayish-green velvety stratum ;
spores
very variable, globose elliptical or oblong, .00016 to -.^008 in.
long, continuous ^r at length with one to three septa. ./*;^
Unripened grains of Indian corn, Zea Mays. lienp,nds.
September. ' . i^
The species of Cladosporium are generally saprophytes, J)\\t
this one appears to attack the living tissues of the grain. The
kernel ruptures at the apex, revealing its white starchy contents,^
which are soon overspread by a gra^^^ish-green or olivaceous velvefr^^
coating of filaments which give a moldy appearance to the exposed
surface. The rupture widens and the contents gradually dis- ^
appear till the grain is deeply excavated. The fungus is a peculiar
and apparently an injurious one.
Napicladium gramineum n. sp.
Spots brown, soon elongated and confluent, often occupying
the whole leaf ; tufts minute, punctiform, black, the hyphaB short,
croAvded, somewhat nodulose above ; spores clavate, having one
to three septa, .0012 to .0024 in. long, .0004 to .0005 broad.
Living leaves of rough meadow grass, Poa trimalis. Delmar.
June.
This fungus is evidentl}^ a harmful one. It kills the leaves
attacked by it. It differs from W. arundinaceum in its punctiform
habit and narrower spores.
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