. Synopsis of the British Basidiomycetes ; a descriptive catalogue of the drawings and specimens in the Department of botany, British museum. Fig. 103.—a, Exobasidium Vacc/niz Woron., one-half natural size, b, sectionthrough hymenium of ditto, showing basidia and spores, X 500. Exobasidium THELEPHORACE/E 423 normally tetrasporous, but spores sometimes varying in number fromone to five. The hymenial cells are borne on vegetative hyphaewhich grow in the cellular tissue of the host and form a loose stratumon its external surface. Spores ovate to elongate-oval, continuous,rarely becoming septate,
. Synopsis of the British Basidiomycetes ; a descriptive catalogue of the drawings and specimens in the Department of botany, British museum. Fig. 103.—a, Exobasidium Vacc/niz Woron., one-half natural size, b, sectionthrough hymenium of ditto, showing basidia and spores, X 500. Exobasidium THELEPHORACE/E 423 normally tetrasporous, but spores sometimes varying in number fromone to five. The hymenial cells are borne on vegetative hyphaewhich grow in the cellular tissue of the host and form a loose stratumon its external surface. Spores ovate to elongate-oval, continuous,rarely becoming septate, colourless. (Fig. 103.) Most nearly allied to Corticium, but differing in the absence ofa sporophore or subiculum and in being parasitic. Exoaseus, anAscomycetous fungus, sometimes grows in company with Exobasidium. Species 1899, 1900 1899. E. Vaeeinii Woron. (from its growth on Vaccinium and its allies) a b , effused, usually orbicular or elongate, often on under surface of leaves and round stems, pale rose,covered with a white bloom. June-Aug. \ in. Red or purple patches occur on the upper surface of theleave
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