. Nature and development of plants. Botany. ISO LIFE OF A SLIME MOULD form, resembling a miniature, brownish puff ball, is often seen on stumps and fallen logs (Fig. 87). Other kinds are illustrated in Fig. 88. They range in size from scarcely a pin head to nearly a foot in diameter and from spherical to cylindrical and cake-like masses. Not infrequently they are of great beauty owing to their coloration and lace-like structures. These small sacs or spor- angia (sing, sporangium) as they are commonly called, repre- sent but one stage in the life of the slime moulds. If we begin with an examina
. Nature and development of plants. Botany. ISO LIFE OF A SLIME MOULD form, resembling a miniature, brownish puff ball, is often seen on stumps and fallen logs (Fig. 87). Other kinds are illustrated in Fig. 88. They range in size from scarcely a pin head to nearly a foot in diameter and from spherical to cylindrical and cake-like masses. Not infrequently they are of great beauty owing to their coloration and lace-like structures. These small sacs or spor- angia (sing, sporangium) as they are commonly called, repre- sent but one stage in the life of the slime moulds. If we begin with an examination of the dust that floats away from these. Fig. 87. Fig. 88. Fig. 87. The sporangial stage of two common slime moulds: A, Lyco- gala. B, Arcyria. C, sporangia rupturing, hair-like structures (the capil- litium) and ppores protruding. D, sporangia emptied. Fig. 88. Open types of sporangia: A, Stemonitis, at left a single spo- rangium enlarged, showing net-like structure formed by capillitium radiating from the central stalk of the sporangium. B, Cribaria. sacs every time they are tapped, the life history will be found to be about as follows: Under the microscope the particles of dust are seen to be minute cells or spores (Fig. 89, A). You may think of a cell as a cube, a sphere or as assuming almost any form,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Curtis, Carlton Clarence, 1864-1945. New York, H. Holt
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