. Elementary botany. Botany. FUNGI: MUCOR. 121 After mounting a small quantity of the mycelium bearing these heads, if we have been careful to take it where the heads appear quite young, it may be possible to study the early stages of their. Fig. 131. Portion of banana with a mould (Rhizopus nigricans) growing on one end. development, ^^'e shall probably note at once that the stalks or upright threads which support the heads are stouter than the threads of the mycelium. These upright threads soon have formed near the end a cross wall which separates the protoplasm in the end from the remain- d
. Elementary botany. Botany. FUNGI: MUCOR. 121 After mounting a small quantity of the mycelium bearing these heads, if we have been careful to take it where the heads appear quite young, it may be possible to study the early stages of their. Fig. 131. Portion of banana with a mould (Rhizopus nigricans) growing on one end. development, ^^'e shall probably note at once that the stalks or upright threads which support the heads are stouter than the threads of the mycelium. These upright threads soon have formed near the end a cross wall which separates the protoplasm in the end from the remain- der. This end cell now enlarges into a ^â esicle of considerable size, the head as it appears, but to which is applied the name of sporangium, (sometimes called gonidangium), because it encloses the gonidia. At the same time that this end cell is enlarging the cross wall is arching up into the interior. This forms the columella. All the protoplasm in the sporangium now divides into gonidia. These are small rounded or oval bodies. The wall of the spo-. 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 Atkinson, George Francis, 1854-1918. New York, H. Holt
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