. A textbook of botany for colleges and universities ... Botany. THALLOPHYTES 73 ing filaments (ascogenous hyphae), whose ultimate branches form asci. This fertilized oogonium giving rise to ascogenous hyphae is usually called an ascogonium. From hyphae beneath the ascogonium branching filaments arise that produce the colored paraphyses, and still other sterile hyphae give rise to the ascocarp (fig. 178). Usually several ascogonia are involved in a single Fig. 177. — Pyronema: oogo- nium with its conjugating tube (or trichogyne); antheridium curved around the trichogyne (hence in se


. A textbook of botany for colleges and universities ... Botany. THALLOPHYTES 73 ing filaments (ascogenous hyphae), whose ultimate branches form asci. This fertilized oogonium giving rise to ascogenous hyphae is usually called an ascogonium. From hyphae beneath the ascogonium branching filaments arise that produce the colored paraphyses, and still other sterile hyphae give rise to the ascocarp (fig. 178). Usually several ascogonia are involved in a single Fig. 177. — Pyronema: oogo- nium with its conjugating tube (or trichogyne); antheridium curved around the trichogyne (hence in section the latter appears as ,if piercing the former); trichogyne tip fused with antheridium and receiving nuclei; nuclei collecting in oogonium, —- After 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 Coulter, John Merle, 1851-1928; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company


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