Cambium, plural Cambiums, orCambia, in plants, layer of actively dividing cells between xylem (wood) and phloem (bast) tissues that is responsible for the secondary growth of stems and roots (secondary growth occurs after the first season and results in increase in thickness).

The vascular cambium and cork cambium are secondary meristems that are formed in stems and roots after the tissues of the primary plant body have differentiated. The vascular cambium is responsible for increasing the diameter of stems and roots and for forming woody tissue. The cork cambium produces some of the bark.

: a thin formative layer between the xylem and phloem of most vascular plants that gives rise to new cells and is responsible for secondary growth. Other Words from cambium Example Sentences Learn More About cambium.

A cambium (plural cambia or cambiums), in plants, is a tissue layer that provides partially undifferentiated cells for plant growth. There are several distinct kinds of cambium found in plant stems and roots: Cork cambium, a tissue found in many vascular plants as part of the periderm.

The vascular cambium (also called main cambium, wood cambium, bifacial cambium; plural “cambia”) is a plant tissue located between the xylem and the phloem in the stems and roots of vascular plants.

Three Types

Secondary growth is initiated by the activity of the vascular cambium as far as the steler region is concerned. This intrafascicular cambium is absent in the open vascular bundles of the monocot stem, thus the process cannot take place .

So, the correct answer is ‘cambium’.

Campanulales