. Botanical gazette. Plants. BOTANICAL GAZETTE [JULY and basidia in practically mature condition are shown in figs. 45, 46, 49, and in text fig. 6. The young basidia and cystidia, and the filaments which bear them, are constantly binucleate, as are the other cells of the young hymenophore, and in fact all parts of the young basid- iocarp. The nuclei in the cystidia never fuse, and older cystidia lose their nuclei by degeneration. The cystidia are at all times much vacuo- late and with scanty cytoplasm, while the basidia and paraphyses are filled with dense protoplasm. Very com- monly the matur
. Botanical gazette. Plants. BOTANICAL GAZETTE [JULY and basidia in practically mature condition are shown in figs. 45, 46, 49, and in text fig. 6. The young basidia and cystidia, and the filaments which bear them, are constantly binucleate, as are the other cells of the young hymenophore, and in fact all parts of the young basid- iocarp. The nuclei in the cystidia never fuse, and older cystidia lose their nuclei by degeneration. The cystidia are at all times much vacuo- late and with scanty cytoplasm, while the basidia and paraphyses are filled with dense protoplasm. Very com- monly the mature cystidium has a mucous cap (fig. 49), thus suggesting a possible excretory function, but this is not a constant Fig. 6.—Detail of portion of gill shown in figs. 46 and 49, showing cystidia, basidia, paraphyses, and ultimate development of down- ward outgrowths from subhyme- nium (internal cystidia). SURFACE CHARACTERS As was noted in the description of the youngest stages of the fruit body, the outer portion of the pileus is made up of h^q^hae which radiate in a fanlike manner. As the development proceeds these hyphae become closely compacted (figs. 32; 33), but for some time retain this definite arrangement. The outer cells of this layer soon enlarge and appear as a uniform palisade layer, as shown in fig. 40, which is a higher magnification of the surface of the fruit body shown in fig. 19. The filaments making up the interior of the pileus branch and become much interwoven. As the pileus expands the cells forming the uniform palisade layer enlarge, giving the characteristic structure to the surface of the mature pileus (fig. 41). Structurally these cells are binucleate, and in origin seem to be homologous to the cystidia on the surface of the gills. These cells, even from youngest stages, are filled with a yellow granular content, however, and give to the pileus its characteristic Please note that these images are extracted from scanned page imag
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