. Comparative morphology of Fungi. Fungi. 176 COMPARATIVE MORPHOLOGY OF FUNGI cystis, they branch repeatedly (Fig. 116, 1 and 2). In the only cytologi- cally studied species belonging to this subgenus, the phialides, and hence the conidia, are uninucleate. From Aspergillus, Aspergillopsis and Citromyces form an unnotice- able transition to the second important genus whose conidiophores are much branched and lack the capitate swellings at the junction of phia-. Fig. 110.—Pcnicillium claviforme. Coremia on malt agar, with snowy aerial mycelium. (After Wehmer, 1914.) lides (Fig. 117, B). The oute
. Comparative morphology of Fungi. Fungi. 176 COMPARATIVE MORPHOLOGY OF FUNGI cystis, they branch repeatedly (Fig. 116, 1 and 2). In the only cytologi- cally studied species belonging to this subgenus, the phialides, and hence the conidia, are uninucleate. From Aspergillus, Aspergillopsis and Citromyces form an unnotice- able transition to the second important genus whose conidiophores are much branched and lack the capitate swellings at the junction of phia-. Fig. 110.—Pcnicillium claviforme. Coremia on malt agar, with snowy aerial mycelium. (After Wehmer, 1914.) lides (Fig. 117, B). The outermost branches from which the phialides radiate have a certain systematic value and are called metulae (Westling, 1911). While in the majority of forms the metulae and phialides (like the hyphal cells) have several nuclei, in some strains of the Penicillium crustaceum group, as in Aspergillus (Sterigmatocystis) nidulans, they are uninucleate; in these forms on a thallus with multinucleate cells there arise uninucleate conidia which only at germination again become 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 Gäumann, Ernst Albert, 1893-1963; Dodge, Carroll William, 1895-. New York [etc. ] McGraw-Hill Book Company, Inc.
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