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midrib's Usage Examples:

In the larger veins of the leaf especially in the midrib, in the petiole, and in the young stem, a1 extremely frequent type of mechanical tissue is collenchyma.

The stereom of the moss is found mainly in the outer cortex of the stem and in the midrib of the leaf.

In the more highly developed series, the mosses, this last division of labor takes the form of the differentiation of special assimilative organs, the leaves, commonly with a midrib containing elongated cells for the ready removal of the products of assimilation; and in the typical forms with a localized absorptive region, a well-developed hydrom in the axis of the plant, as well as similar hydrom strands in the leaf-midribs, are constantly met with.

In three generaBlyttia, Symphyogyna and Hymenophytum there are one or more strands or bundles consisting of long thickwalled fibre-like (prosenchymatous) cells, pointed at the ends and running longitudinally through the thick midrib.

Or the thallus may have a leaf-like form, the branches from the central threads which form the midrib growing out mainly in one plane and forming a lamina, extended right and left of the midrib.

In it no fruit is produced, and the pistil consists merely of sessile leaves, the limb of each being green and folded, with a narrow prolongation upwards, as if from the midrib, and ending in a thickened portion.

The centre of the leaf is often occupied by a midrib consisting of several layers of cells.

The leaf has a broadly sheathing base succeeded by a short stalk bearing the pitcher, which represents a much enlarged midrib with a winglike lamina.

The leaf consists of a central midrib, several cells thick, and two wings, one cell thick.

The midrib has a strong band of stereom above and below.

midrib's Meaning':

the vein in the center of a leaf