File:The natural history of plants, their forms, growth, reproduction, and distribution; (1902) (14579062880).jpg

Identifier: naturalhistoryof02kern (find matches)
Title: The natural history of plants, their forms, growth, reproduction, and distribution;
Year: 1902 (1900s)
Authors: Kerner von Marilaun, Anton, 1831-1898 Oliver, Francis Wall, 1864- Macdonald, Mary Frances Ewart Busk, Marian Balfour, Lady
Subjects: Botany
Publisher: London, Blackie
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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eunderground parts of Wood Anemones and forms its sclerotia in the tubers of thisplant. In the spring, instead of Anemone-flowers coming up, the sclerotium givesrise to a number of long-stalked apothecia which appear just above the surface ofthe ground. Other more complex Discomycetes are the Helvellas and Morels, forms purelysaprophytic. Helvella produces a stalked receptacle, curiously folded (see figs. 388 * THALLOPHYTA. 683 and 388) and plaited; the whole of the exposed surface of this receptacle is coveredwith asci. The Morel (Morchella esculenta, fig. 3881) possesses a thick stalk bearinga large fleshy receptacle marked out in pitted areas. Nearly allied is the genusOeoglossum, possessing club-shaped receptacles, black in colour, and covered withasci. G. diforme, 2-4 inches high, is often met with among grasp in the autumn. The Lichenes belonging to this family are treated with the other Lichensat p. 691. Reference to a small group of forms, the Saccharomycetes or Yeasts, may be
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Discomycetes. The Morel (Morchella esculenta). « Vertical section of the fertile surface of the Morel showing five asci with their sportsand filamentous paraphyses between the asci. s Peziza (Helotivm) Ttiba. * Antlwpeziza Wmteri. * Peziza vesiculosa.« Helvella infula. i Helvetiafistulosa. >, *, , «, ? rat. size; ^xi; 2x120. introduced here. They constitute a detached family with ascomycetous affinities,and characterized by their very peculiar mode of life. For the most part theydo not form mycelia, but increase by budding and by the formation of spores.Saccharomyces cerevisece is the well-known Brewers Yeast. The cells are oval andcolourless, and provided with one or more conspicuous vacuoles; the cell-nucleus isnot readily demonstrable, though there is little doubt of its existence. Growthhere is by budding, little processes being pushed out at the periphery at one or morespots and gradually enlarging (figs. 387*^^); ultimately they are cut oft from theparent-cell by the compl

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