vascular bundle

noun

, Botany.

1. a longitudinal arrangement of strands of xylem and phloem, and sometimes cambium, that forms the fluid-conducting channels of vascular tissue in the rhizomes, stems, and leaf veins of vascular plants, the arrangement varying with the type of plant.

vascular bundle

noun

1. a longitudinal strand of vascular tissue in the stems and leaves of higher plants

vascular bundle

1. A strand of primary tissues found within the stem of a plant and consisting of xylem and phloem, along with cambium. The vascular bundles develop from the procambium of the growing stem. In the monocotyledons, vascular bundles are found in complex arrangements dispersed throughout the stem. In eudicotyledons, they are arranged in a ring, with the xylem of each bundle on the inside and the phloem on the outside.
2. Also called fibrovascular bundle
3. See also fascicular cambium

Word History and Origins

Origin of vascular bundle¹

First recorded in 1880–85

Example Sentences

Phlō′�m, the bast or liber portion of a vascular bundle.

From Project Gutenberg

The vascular bundle entering the stem from a leaf with a single vein passes by a more or less direct course into the 762 central cylinder of the stem, and does not assume the girdle-like form characteristic of the cycadean leaf-trace.

From Project Gutenberg

In Sciadopitys similar spurs occur, each bearing a single needle, which in its grooved surface and in the possession of a double vascular bundle bears traces of an origin from two needle-leaves.

From Project Gutenberg

A vascular bundle consists of only xylem and phloëm, without the cambium, and so no secondary thickening can take place in the stems of grasses.

From Project Gutenberg

The cross and longitudinal sections of a vascular bundle of the stem of Pennisetum cenchroides, are shown in figs.

From Project Gutenberg