Which of the following is classified as an herbaceous ornamental?

Chrysanthemums are classified as herbaceous ornamentals because they are non-woody plants that die back to the ground in winter, regrowing in the spring from their roots. Herbaceous plants are typically characterized by their soft, green stems, which do not produce persistent woody tissue. Chrysanthemums fit this description perfectly, as they are known for their vibrant flowers and are commonly used in gardens and landscaping to provide color.

In contrast, arborvitae, barberry, and boxwood are classified as woody plants. Arborvitae and boxwood are evergreen, meaning they retain their leaves throughout the year and have a hard, woody structure. Barberry, while deciduous, still exhibits a woody framework. These distinctions are essential for understanding plant classifications in horticulture and can influence decisions in landscaping, gardening, and pest management protocols.