. Elementary botany . Fig. 60. Portion of plant of Frullania, a foliose liverwort. Fig. 61. Portion of same more highly magni- fied, showing over- lapping leaves. 170. Nutrition of the mosses.—Among the mosses which are usually common in moist and shaded situations, examples are abundant which are suitable for the study of the organs of absorption. If we take for example a plant of Mnium (M. affine) which is illustrated in fig. 64, we note that it consists of a slender axis with thin flat, green, leaf-like expansions. Examin- ing with the microscope the lower end of the axis, which is attached
. Elementary botany . Fig. 60. Portion of plant of Frullania, a foliose liverwort. Fig. 61. Portion of same more highly magni- fied, showing over- lapping leaves. 170. Nutrition of the mosses.—Among the mosses which are usually common in moist and shaded situations, examples are abundant which are suitable for the study of the organs of absorption. If we take for example a plant of Mnium (M. affine) which is illustrated in fig. 64, we note that it consists of a slender axis with thin flat, green, leaf-like expansions. Examin- ing with the microscope the lower end of the axis, which is attached to the substratum, there are seen numerous brown colored threads more or less branched. (For nutrition of moulds, mushrooms, parasitic fungi, dodder, carnivorous plants, lichens, aquatic plants, etc., sec Tart III. Ecology.) 171. The plant body. In the simpler forms of plant life, as in spirogyra and many of the algae and fungi, the plant body is no1 differentiated into parts. In many other cases the only differentiation is between the growing pari and the fruiting part. In the algae and fungi there is no differentiation into stem and leaf, though there is an approach to it in some of the higher forms. Where till— simple plant body is flattened, as in the sea-wrack, m- ulva, it is a frond. The Latin word fof frond is thallus, and this name i>
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