. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—GASTROMVCETES. 309 which anastomose with one another in every direction and pass on one side into the tissue of the peripheral peridium, on the other it may be into that of the central column, seeming as if they radiated from it. The chambers of Polysaccum are larger, of the size even of a pea, and are less irregular. The chambers are in most cases in countless numbers; they form altogether a mass of tissue which is distinguished from th
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—GASTROMVCETES. 309 which anastomose with one another in every direction and pass on one side into the tissue of the peripheral peridium, on the other it may be into that of the central column, seeming as if they radiated from it. The chambers of Polysaccum are larger, of the size even of a pea, and are less irregular. The chambers are in most cases in countless numbers; they form altogether a mass of tissue which is distinguished from the adjoining tissue by its chambered structure and by the formation of spores and is known as the gleba. As regards the more minute structure, we may distinguish a middle layer or trama in the walls of each chamber, and a hymeniaX layer, on both surfaces of the trama. The two parts (Fig. 142) resemble in all essential points the parts of the same name in the Hymenomycetes. In the cases which have been most thoroughly examined (the Hymenogastreae, Phalloideae, Lycoperdon, Bovista, Scleroderma, Geas- ter) the trama is formed of a weft of copiously branched hyphae, which chiefly run parallel to the surface of the walls, and pass without interruption from one chamber- wall to the adjoining ones and into the tissue of the peridium. Numerous closely packed branches from the hyphae of the trama run towards the interior of the chambers, and there form the hymenial tissue. In some cases they are comparatively short, of uniform height and placed palisade-like side by side and perpen- dicularly upon the surface of the trama; thus they form a sharply defined hymenial layer which lines the empty cavity of the chamber and is exactly like that of the Hymenomy- cetes (very many Hymenogastreae (Fig. 142), species of Geaster, Lycoperdon, Phallus). In another series of cases (Melanogaster, Sclero- derma, Polysaccum, Geaster hygrometricus), all the hyphae which enter a chamber from the hymenium
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