The leaves were large, and the leaf bases strong and well supplied with very numerous branching vascular bundles.
These are usually called "vascular bundles" in the flowering plants] [Illustration: Fig.
The wood of the Florida species is light and soft, with numerous small fibro-vascular bundles, the exterior of the stem being much harder than the spongy interior.
The half lamina has six smaller vascular bundles, only the stronger one girdered.
Vascular bundles girdered, the stronger above and below.
The stem of a grass consists of a mass of parenchymatous cells with a number of fibro-vascular bundles imbedded in it, and it is covered externally by a protective layer of cells, the epidermis.
On account of this bundle-sheath the bundles are called =fibro-vascular bundles=.
The peripheral portion of the stem becomes somewhat rigid and thick due to the aggregation of vascular bundles, some small and others large.
The usual number of fibro-vascular bundles is seven.
The cross-section of the stalk shows two rather large roundish fibro-vascular bundles on the anterior side, and three, the middle one largest, at the back.
These are ends of the fibro-vascular bundles, which in these plants are scattered through the cellular tissue instead of being brought together in a cylinder outside of the pith.
These two kinds of cells are generally associated together in woody bundles, called therefore fibro-vascular bundles.
These cells probably serve for conducting fluids, much as the similar but more perfectly developed bundles of cells (fibro-vascular bundles) found in the stems and leaves of the higher plants.
A cross-section of the young stem shows about six separate fibro-vascular bundles arranged in a circle (S, fb.
Each leaf is traversed by two fibro-vascular bundles of entirely different structure from those of the ferns.
The impulse no doubt is transmitted in straight radiating lines from the excited gland to the surrounding tentacles; it cannot, therefore, be sent along the fibro-vascular bundles.
It will be necessary first to describe briefly the course of the main fibro-vascular bundles.
It was further shown that the motor impulse and other forces or influences, proceeding from the glands when excited, pass through the cellular tissue, and not along the fibro-vascular bundles.
In both simple and compound leaves, according to the amount of segmentation and the mode of development of the parenchyma and direction of the fibro-vascular bundles, many forms are produced.
It consists of the fibro-vascular bundles with a varying amount of cellular tissue.
The wood-vessels form part of the fibro-vascular bundles or veins of the leaf and are continuous throughout the leaf-stalk and stem with the root by which water is absorbed from the soil.
In vascular acotyledonous plants there is frequently a tendency to fork exhibited by the fibro-vascular bundles in the leaf; and when this is the case we have fork-veined leaves.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "vascular bundles" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
