. Botany; an elementary text for schools. Plants. 86 DEPENDENT PLANTS. 0. A mushroom, exam- ple of a saprophytic plant. 180. The threads of the parasitic fungus usually creep through the intercellular spaces in the leaf or stem and send suckers (or haustoria) into the cells (Fig. 122). These threads (or hyphse) clog the breathing spaces of the leaf and often plug the stomata, and they also appro- priate and disorganize the cell fluids : thus they injure or kill their host. The mass of hyphae of a fungus is called mycelium. Some of the hypha? finally grow out of the leaf and produce spores or r
. Botany; an elementary text for schools. Plants. 86 DEPENDENT PLANTS. 0. A mushroom, exam- ple of a saprophytic plant. 180. The threads of the parasitic fungus usually creep through the intercellular spaces in the leaf or stem and send suckers (or haustoria) into the cells (Fig. 122). These threads (or hyphse) clog the breathing spaces of the leaf and often plug the stomata, and they also appro- priate and disorganize the cell fluids : thus they injure or kill their host. The mass of hyphae of a fungus is called mycelium. Some of the hypha? finally grow out of the leaf and produce spores or reproductive cells which answer the purpose of seeds in distribu- ting the plant (b, Fig. 122). 181. A plant which lives on dead or decaying matter is a saprophyte. Mushrooms are ex- amples: they live on the decaying matter in the soil. Mould on bread and cheese is an example. Lay a piece of moist bread on a plate and invert a tumbler over it. In a few days it will be mouldy. The spores were in the air, or perhaps they had already fallen on the bread but had not had opportunity to grow. Most plants are able to make use of the humus or vegetable mould in the soil, and to that extent might be called saprophytic. 182. Some parasites spring from the ground (Figs. 118, 119), as other plants do, but they are para- sitic on the roots of their hosts. Some parasites may be partially parasitic and partially saprophytic. 119. CoraUorhiza or coral-root, \' '^ \ - T showing the mycorrhiias. Many (pcrhaps most) of these root-. 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, Macmillan Co.
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