. The elements of botany for beginners and for schools. Plants. SECTION 2.] A PATTERN PLANT. 13 spring. But every such point for new growth may equally bear the name. When there is such a bud between the cotyledons in the seed or seedling it is called the Plumule. This is conspicuous enough in a beau (Fig. 29.), where the young leat'ol" the new growth looks like a little plume, whence the name, plumule. In flax-seed this is very minute indeed, but is discernible with a magnifier, and in the seedling it shows itself distinctly (Fig. 5, 6, 7). 13. As it grows it shapes itself into a second
. The elements of botany for beginners and for schools. Plants. SECTION 2.] A PATTERN PLANT. 13 spring. But every such point for new growth may equally bear the name. When there is such a bud between the cotyledons in the seed or seedling it is called the Plumule. This is conspicuous enough in a beau (Fig. 29.), where the young leat'ol" the new growth looks like a little plume, whence the name, plumule. In flax-seed this is very minute indeed, but is discernible with a magnifier, and in the seedling it shows itself distinctly (Fig. 5, 6, 7). 13. As it grows it shapes itself into a second pair of leaves, which of course rests on a second joint of stem, although in this instance that remains too short to be well seen. Upon its summit appears the third pair of leaves, soon to be raised upon its proper joint of stem; the next leaf is single, and is carried up still further upon its supporting joint of stem ; and so on. The root, meanwhile, continues to grow underground, not joint after joint, but continuously, from its lower end; and commonly it before long multiplies itself by branches, which lengthen by the same continuous growth. But stems are built up by a succession of leaf-bearing growths, such as are strongly marked in a reed or corn- stalk, and less so in such an herb as Flax. The word "joint" is ambigu- ous : it may mean either the portion between successive leaves, or their junction, where the leaves are at- tached. For precision, therefore, the place where the leaf or leaves are borne is called a Node, and the naked interval between two nodes, an Internode. 14. In this way a simple stem with its garniture of leaves is de- veloped from the seed. But besides this direct continuation, buds may form and develop into lateral stems, that is, into branches, from any node. The proper origin of branches is from the Axil of a leaf, i. e. the angle between leaf and stem on the upper side ; and branches may again branch, so building up the herb, shrub, or
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectplants, bookyear1887
