. Lectures on the evolution of plants. Botany; Plants. (Mucorini) may have originated from algee like the Conjugatae, just as the water-moulds are supposed to have originated from green forms resembling Vau- cheria; but the structure of the thallus and the non-sexual spores of the black- moulds are so very different from those of the Conjugatse that it seems much more likely that the similarity in the sexual cells is purely accidental. At any rate these fungi and their near relatives the insect-fungi (Entomophthoracese) must be regarded as much further removed from the algae than the water- mo
. Lectures on the evolution of plants. Botany; Plants. (Mucorini) may have originated from algee like the Conjugatae, just as the water-moulds are supposed to have originated from green forms resembling Vau- cheria; but the structure of the thallus and the non-sexual spores of the black- moulds are so very different from those of the Conjugatse that it seems much more likely that the similarity in the sexual cells is purely accidental. At any rate these fungi and their near relatives the insect-fungi (Entomophthoracese) must be regarded as much further removed from the algae than the water- moulds and white-rusts with their ciliated zoospores, and distinct oogonia and Fig. 22 (Phycomycetes). — A, a plant of a com- mon black-mould (Mucor stolonifer), with groups ol stalked sporangia, xp, arising from the creeping filament; r, rliizoids, or root- lets; B, young; C, mature sporangium seen in optical section, showing the columella, col.; D-F, successive stages in the develop- ment ol the sexual spore or zygospore. The Mycomycetbs Most of the Fungi differ in structure so widely from the green plants that it is difficult to find any points of resemblance. These typical Fungi or Mycomycetes differ in nearly all respects from other plants, both in their structure and their methods of 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 Campbell, Douglas Houghton, 1859-1953. New York, The Macmillan Co. , London, Macmillan & Co. , Ltd.
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
