. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE STEM, OB ASCKNDINQ AXIS. 33 sisting of young wood bearing one or more buds. These " strike" root when planted in the earth. So the grape-vine and hop. 159. The Offset is a term applied to short side-branches ending im a tnft (rosette) of leaves, and capable of taking root when separated from the parent plant, as in 41, A strawberry plant (Fragaria vesca) sending out a ranner. 160. The Eunner is a pr
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE STEM, OB ASCKNDINQ AXIS. 33 sisting of young wood bearing one or more buds. These " strike" root when planted in the earth. So the grape-vine and hop. 159. The Offset is a term applied to short side-branches ending im a tnft (rosette) of leaves, and capable of taking root when separated from the parent plant, as in 41, A strawberry plant (Fragaria vesca) sending out a ranner. 160. The Eunner is a prostrate, filiform branch issuing from certain short-stemmed herbs, extending itself along the surface of the ground, striking root at its end without being buried. Thence leaves arise and a new plant, which in turn sends out new runners ; as in the strawberry. 161. The node or joint of the stem marks a definite point of a pecu- liar organization where the leaf with its axillary bud arises. The nodes occur at regular intervals, and the spaces between them are termed in- temodes. This provides for the symmetrical arrangement of the leaves and branches of the stem. In the root no such provision is made, and the branches have no manner of arrangement. 162. Why the stem gbaduallt diminishes upwards. In the in- tcrnodes the fibres composing the stem are parallel, but at the nodes this order is interrupted in consequence of some of the inner fibres from below turning outwards into the leafstalk, causing more or less a jointed appearance. Hence each internode contains fewer fibres than those below it. 163. fiow THE STEM GROWS. The growth of the stem consists in llie development of the internodes. In the bud the nodes are closely crowded together, with no perceptible internodes, thus bringing the ru- dimentary leaves in close contact with each other. But in the stem, which is afterwards evolved from that bud, we see full grown leaves separated by considerable spaces. That is, while leav
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