THE CCELOMYCETES OF SUFFOLK.
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THE CCELOMYCETES OF SUFFOLK. B Y ARTHUR MAYFIELD,
F.L.S.
O F the various classes of F U N G I that spot and stain the fading leaves and dead or dying twigs and stems of Plants the most numerous are the Fungi Imperfecti, so called because most of them or perhaps all are stages in the life-cycles of the more perfect fungi, especially of the Ascomycetes. Many are wellknown pests of farm, orchard and garden. Fungi Imperfecti are divided into two main groups : (a) Ccelomycetes, in which the spores are formed within the tissues of the host-plant, and (ß) Hyphomycetes which produce their spores outside the host-matrix. The present list enumerates the former of these two groups, the Ccelomycetes* which themselves also fall naturally into two classes, i.e. the Sphaeropsidales producing their spores within a more or less definitely walled-in chamber called a pycnidium, and the Melanconiales occupying pustular cavities enclosed only by the tissues of the host-plant. The late Mr. W. B. Grove's two volumes on ' British Leaf and Stem Fungi,' which have been my guide in collecting and identifying these minute growths, describe over two thousand British species ; and there are, doubtless, many others not yet recognised. I am personally indebted to Mr. Grove for determining many of my earlier finds. With a few exceptions, the following Suffolk species have been collected during the last four or five years ; and it may be understood that the fungus was found in the parish of Mendlesham, near Stowmarket in the middle of the County, whenever no locality is assigned. Our Member, Mr. E. A. Ellis, has kindly allowed me to include some kinds collected by him in Lothingland : all such bear his initials. Hitherto no more than eight kinds, for lack of observers, have been recorded hence : in Henslow and Skepper's 1856 ' Flora of Suffolk,' here initialled HS. This List must be regarded as only a first instalment, for fresh material turns up continually ; it adds 362 species to the known Suffolk Flora.
SPH/EROPSIDALES. 1. 2. 3. 4. 5.
Genus PHYLLOSTICTA, Pers. (Growing on Leaves.) aceris, Sacc.—Found on Acer campestre. platanoidis, Sacc.—Ditto on Acer Pseudoplatanus. cegopodii, All.—Mickfield ; on /Egopodium Podagraria. antirrhini, Syd.—On cultivated Antirrhinum. betulina, Sacc.—Foxhall; on Betula alba.
, *About two hundred of the Ccelomvcetes are described in Cooke's Handbook of British Fungi' 1871, pp! 414-75, under the now obsolete class-name of Coniomycetes.