. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . of the old, undivided genus. The pileus is at first soft and fleshy but tough, becomingindurated, rarely fragile, without furrows or zones on thepileus, and with only a single stratum of tubes, so that practi-cally they are not perennial. Some of the species have acentral stem, and then resemblf Boletus, only that the tramaof the pileus is continuous with » ^e tubes, which are not easilyseparable from the flesh of the cap. Other species have alateral stem, or even a common ste
. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . of the old, undivided genus. The pileus is at first soft and fleshy but tough, becomingindurated, rarely fragile, without furrows or zones on thepileus, and with only a single stratum of tubes, so that practi-cally they are not perennial. Some of the species have acentral stem, and then resemblf Boletus, only that the tramaof the pileus is continuous with » ^e tubes, which are not easilyseparable from the flesh of the cap. Other species have alateral stem, or even a common stem, much divided above, andbearing several pilei (Fig. 52). Finally, other species have nostem at all, and the pileus is broadly attached to the matrix, soas to be semi-orbicular or kidney-shaped. Earely the pileus isreduced to a thin stratum, adherent by its whole surface, as inPoria, but with a slightly reflexed margin. In Fomes thesubstance is woody from the first, becoming very hard, andcovered with a rigid crust; not truly zoned, but becoming con-centrically sulcate. The substance is floccose and interwoven,. 138 INTRODUCTION TO THE STUDY OF FCNGI often zoned, and the tubes are typically stratose, each stratumbeing the growth of a year, so that the species are truly per-ennial. Some have a central, others a lateral stem, but mostcommonly they are attached by a broad* H /^ base, where they are very thick, and notuncommonly of the shape of a horseshoof, or more rarely several pilei growtogether in an imbricate manner. Thespecies of Polyporus, as now restricted,t^^enerally shrink and become contortedm the process of drying; but in Fomesthe substance is so rigid that no shrink-ing or alteration of form takes place,and, except for the depredation of in-FiG. , with gg^j- ^^^^ |^^ i^g preserved unaltered for conimoii stem. ° ^ a century. Such species as Fomescornubovis, when sawn through, resemble sections of buffalo-horn, although generally the internal substance i
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Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1895
