Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . ead or-ganic matter; anda species of Botrytis (Fig. 94). The latter, and other Moulds ofthe same or of other kinds, feed upon the juices of living plants, andeven animals, where they commit great ravages. The too well-known potato-disease, for example, is probably caused by the attackof a species of Botrytis; a similar species has long been known asthe cause of the muscardine, a fatal malady of silk-worms, and themalady
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . ead or-ganic matter; anda species of Botrytis (Fig. 94). The latter, and other Moulds ofthe same or of other kinds, feed upon the juices of living plants, andeven animals, where they commit great ravages. The too well-known potato-disease, for example, is probably caused by the attackof a species of Botrytis; a similar species has long been known asthe cause of the muscardine, a fatal malady of silk-worms, and themalady which has for several years destroyed a great part of thegrape-crop in Europe is caused by another parasitic plant of thesame simple structure. The accompanying figures show only theperfect state of these troublesome little plants, or rather their fructi-fication. Their vegetation consists of long and branching threads(of which a small portion only is represented at the base), whichpenetrate and spread widely and rapidly through the vegetable, orother body they live on, and feed upon its juices. At length theybreak out upon the surface, and produce countless numbers of. FIG. 92-94. Three kinds of Mould, magnified. 92. The Bread-Mould (Mucor, or Asco-phora). 93. The Cheese-Mould (Aspergillus glaucus). 94. Botrytis Bassiaua, the specieswhich attacks silk-worms, &c. G* 66 THE GENERAL DEVELOPMENT OF PLANTS, spores (97), or minute rudimentary cells, which are detached fromthe parent plant and serve the purpose of seeds. The spores arein some cases produced (probably by original cell-formation), in anenlarged terminal cell, as in the Bread-Mould (Fig. 92) ; while inother cases they are naked, and arise from cell-division, as in , 94. 106. Plants of this simple structure (belonging chiefly to thelower Alga? and Fungi) are almost as various in form and numerousin species as are the higher kinds of vegetation. Some consist of asingle jointed thread; others are excessively branche
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
