»! 'r
sparkling stars. The filaments are slightly thickened at their
extremity, and singularly recurved, shewing a slight approach
to the genus Podosphoeria of Professor K u n z e , which is perhaps
too nearly related to Erysiphe. The peridia appear to
vary somewhat in si^e on different plants, and still more so in
the number of radicular radiating filaments. Excepting these
particulars, however, I perceive no variation in character. The
finest specimens I have seen, were those communicated by
Mr B a x t e r , particularly in the great number of radiating filaments.
These I have represented in the Plate. Sometimes
the filaments do not exceed in number twenty or thirty.
Fig. 1. E. adunca on a Willow leaf, natural size. Fig. 2 . A group o f plants,
two o f them with the f laments elevated. Fig. 3. A single plant. Fig. 4. A
peridium in the act o f bursting from the application o f mmsture. Fig. 5.
Sporangiola. Fig. 6 . Extremities of two f laments ; magnified.
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