As regards size, the epidermal cells overlying the sclerenchyma are small and those lying over parenchyma are larger.
Even from the few examples dealt with above, it is obvious that the range of variation of sclerenchyma in leaves is very great.
The other vascular bundles may have bands of sclerenchyma on both sides or on one side only or none.
There is a continuous ring of sclerenchyma separated from the epidermis by a fairly broad cortex.
The cortex outside the band of sclerenchyma is full of air-cavities, small and large.
The epidermal cells lying over sclerenchymaand the smaller vascular bundles are small and round, while those lying over the furrows between the vascular bundles are large and are called =motor= or =bulliform cells=.
In the case of smaller bundles some are strengthened by sclerenchyma on the lower side and others have none.
A well developed continuous ring of sclerenchyma is present and this is connected with the epidermal layer at short intervals by means of short sclerenchymatous bands.
In the leaves of grasses growing in dry situations the development of sclerenchymais generally very considerable.
All the cells lying in the furrow between the motor-cells and the sclerenchyma are clear cells free from chlorophyll grains.
All the vascular bundles in the leaves of Eragrostis Willdenoviana are provided with sclerenchyma on both the sides.
In the leaves of Aristida setacea there is a considerable amount of sclerenchyma whilst in some leaves such as those of Panicum colonum, P.
It is this great development of sclerenchyma that makes the outer portion of the cortex hard.
Pennisetum cenchroides the sclerenchyma is separated from the chlorophyllous layer by layers of parenchyma.
It consists of two elements--sclerenchyma and parenchyma cells.
Moeller)] Sclerenchyma forms an uninterrupted covering in the early stages of the seed; but as the seed develops, surrounding tissues grow more rapidly than the sclerenchyma, and the cells are pushed apart and scattered.
Stapf, having inspected one of the belts, thinks this material is composed of split strips of sclerenchyma fibre from the petiole or rhizome of a fern, and not that of a creeping plant.
In this group of species there is no segregation of sclerenchyma into an effective tissue.
Sclerenchyma at tips of the ridges dense: smaller bands below: strong at margins.
Ridges practically obsolete and subtending bands of sclerenchyma slight: hence the leaf-surfaces are parallel.
Vascular bundles isolated, and the sclerenchyma reduced to a few cells in a single layer beneath the epidermis at the apex of each ridge and below the bundle.
Vascular bundles of three orders, isolated, without girders, but with a small band of sclerenchyma above and below.
Stronger bundles with girders of sclerenchyma joining them to the epidermis, at least below.
Leaves folded and in section +V+-shaped, hardly keeled, with sclerenchyma at apex.
The lower girders may not fuse laterally into a continuous band of sclerenchyma below (Fig.
Elymus is very like Psamma, but has a few stomata below and the sub-epidermal sclerenchyma is not continuous (see Fig.
The principal vascular bundles are girdered below, the sclerenchyma joining into a strong continuous sheath.
Girders to the primary bundles, but not very strong: marginal and other sclerenchyma faint, as is also the cuticle.
In all the species patches of sclerenchyma were developed, and everything indicates that they were tough and well protected against loss of water, even to a greater extent than are most of the leaves of living Gymnosperms.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "sclerenchyma" in a variety of sentences. We hope that you will now be able to make sentences using this word.
