CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -There is no secondary growth in herbaceous plants because they lack the cambium layer of their vascular tissue. The lack of a cambium layer is also why the stems of herbaceous plants are softer, rather than wood, and die back every winter.

Detailed explanation-2: -Herbaceous (non-woody) plants mostly undergo primary growth, with hardly any secondary growth or increase in thickness. Secondary growth, or wood, is noticeable in woody plants; it occurs in some dicots, but occurs very rarely in monocots.

Detailed explanation-3: -Herbaceous plants, like monocots and herbaceous eudicots, only grow for one growing season (annuals) and they do not present secondary growth. The tissues in woody stems, starting from the outer layer are: bark, vascular cambium, sapwood and heartwood (Figure 3.2.

Detailed explanation-4: -Herbaceous plants do not have secondary growth. The two types of secondary meristem are both named cambium, meaning “exchange” or “change”. Vascular cambium produces secondary xylem (toward the center of the stem or root) and phloem (toward the outside of the stem or root), adding growth to the diameter of the plant.