. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—HYMENOMFCETES. 301. Fig. 137. Hypochnus centrifu^ts, TuL b, b young basidia, the terminal cells of the ramifications of a hy- pha, the branches of which fonn a tuft; at x an H- shaped anastomosis. Magn. 390 times. \)h\ tissue of the sporophore, and closely interwoven and united with one another. In more simple forms, as Hypochnus centrifugus, Tul. (Fig. 137) and the Tremellineae, they may still be separated from one another for considera
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—HYMENOMFCETES. 301. Fig. 137. Hypochnus centrifu^ts, TuL b, b young basidia, the terminal cells of the ramifications of a hy- pha, the branches of which fonn a tuft; at x an H- shaped anastomosis. Magn. 390 times. \)h\ tissue of the sporophore, and closely interwoven and united with one another. In more simple forms, as Hypochnus centrifugus, Tul. (Fig. 137) and the Tremellineae, they may still be separated from one another for considerable distances; but they usually form a delicate tissue very difficult to unravel, which is distinguished by the name of the subhymenial layer or subhymenial tissue. Where the hymenial surface is furnished with projections of definite forms, these pro- jections and the spaces between them are covered uniformly by the hymenium and the subhymenial tissue. Only the outermost free margin of the projections, the edge therefore of the lamellae, the orifice of the pores, the tip of the spikes, is in many species not covered by the hymenium. The inner portion of the projections which bears the subhymenial layer is named the trama (also dis- sepiment or intralamellar tissue). The trama in by far the largest number of cases is distinctly hyphal in structure, and consists of a hyphal mass of the form of the projection, in which the hyphae arise as branches of those of the sporophore along the whole line of insertion of the projection, enter it at its base in a straight or curved line, and run from thence to its free margin in a course parallel to the surface. The trama there- fore usually exhibits a distinctly marked fibril- lation running from the line of insertion to the free margin, as in many Agarici (Fig. 138), Lenzites, species of Polyporus, Trametes Pini, Hydnum zonatum, H. cirrhatum, H. gelatinosum, and in Boletus edulis. The separate hyphae in the trama pursue a straighter or
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