. Comparative morphology of Fungi. Fungi. 358 COMPARATIVE MORPHOLOGY OF FUNGI and may sink from eight to four to two to one, with proportional increases in size. The spores generally become multinucleate while still inside the ascus. The entire morphological and biological development of the asci which we could follow from the Plectascales to Pezizales, their biological discharge apparatus, their transition from spherical to clavate. Fig. 240.— Tuber rufum. 1. Section of fructification. 2. Portion of interior of fructi- fication, a, rind; c, venae internae (trama plates); d, venae externae; h,
. Comparative morphology of Fungi. Fungi. 358 COMPARATIVE MORPHOLOGY OF FUNGI and may sink from eight to four to two to one, with proportional increases in size. The spores generally become multinucleate while still inside the ascus. The entire morphological and biological development of the asci which we could follow from the Plectascales to Pezizales, their biological discharge apparatus, their transition from spherical to clavate. Fig. 240.— Tuber rufum. 1. Section of fructification. 2. Portion of interior of fructi- fication, a, rind; c, venae internae (trama plates); d, venae externae; h, hymenium. {After Tulasne.) form and their arrangement in regular hymenia, has degenerated in the Tuberales on account of their endogenous formation; they have lost their function of spore dissemination, apparently also their clavate form and arrangement in hymenia. The striking correspondence between Tuber and the Plectascales is, according to this concept, only a conver- gence 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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