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218 IIICEOSCOPIC FUXGI.
Conceptacle icith one sporangium.
Appendages floecose
Erysiptiei.
Sphcerotheca.
Conceptacle with many sporangia.
Appendages needle-shaped, rigid .. .. Phijllactinia.
Appendages hooked
Uncinula.
Appendages dichotomous
Microspharia.
Appendages floecose
Erysiphe.
Sph^heotheca, Lev.
Mycelium arachnoid ; perithecia globose, containing a single
globose sporangium ; appendages numerous, floecose.—
Berk. Outl., p. 404.
Sphserotheca pannosa, Lev. Rose Blight; mycelium
thickened, woolly, felted, persistent; conceptacles minute, globose,
scattered; appendages floecose, white; sporangium manyspored.—On
the branches, calyces, petioles, and leaves of Eoses.
Very common. (Plate XL figs. 217, 218.)
Sphserotheca Castagnei, Lev. Hop Blight; on both
surfaces ; mycelium effuse, web-like, commonly evanescent ;
conceptacles
minute, scattered, globose ; appendages numerous, short,
flexuose above ; sporangium many-spored. — On the leaves of the
Hop, Meadow-sweet, and various other plants. Common. (Plate XI.
fig. 216.)
Phtllactinia, Lev.
Perithecia hemispherical, at length depressed, seated on a
persistent or evanescent membranaceo-granular receptacle ;
appendages straight, rigid, acicular, at length bent back.
—Berk. Outl., p. 404.
Phyllactinia guttata, Lev. Hazel Blight; amphigenous;
mycelium web-like, often evanescent ; conceptacles large,
scattered, hemispherical, at length depressed ; appendages hyaline,
rigid, simple ; sporangia 4—20, containing 2—4 spores.— On
the leaves of Hawthorn, Hazel, Ash, Elm, Alder, Beech, Birch,
Oak, Hornbeam, and various other plants. Common. (Plate XL
figs. 219, 220.)
IlNCixirLA,
Lev.
Mycelium floecose ; perithecia globose ;'appendages rigid, simple,
bifid or dichotomous, uncinate, at length bent upwards.
—Berk. Outl., p. 404.