BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
False-colour scanning electron micrograph of the interior of the edible mushroom Coprinus dissemin- atus, commonly known as the crumble cap. The visible mushroom is a "fruit body" which appears only after years of growth of the fungus in the soil. The fruit body produces millions of special cells called basidia from a surface layer known as the hymenium. In this micrograph, the basidia are the elliptical cells at top; at bottom is the hymenial layer in cross-section. Sexual union occurs in the basidia, & results in formation of small cells, or basidiospores, which are released & dispersed by air currents to found new colonies of the fungus. Magnification: x680 at 35mm size. Yellow tint. Ref.: MICROCOSMOS, figure 5.36, page 106.
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