Final answer:
A herbaceous plant with white and green or light green decorative foliage is best described as a plant with decorative leaves. These plants are chosen for their attractive foliage rather than flowers or fruits.
Step-by-step explanation:
The description of a herbaceous plant with decorative foliage that is white and green or only light green fits the description of a plant with decorative leaves. This type of plant might not necessarily have tall stems, colorful flowers, or edible fruits. Instead, its main ornamental feature is the leaves with their attractive forms and color patterns. Herbaceous plants are defined by their lack of woody tissue, producing softer plant structures that might not survive cold winters above ground.
Some plants that have decorative leaves with the colors described might include certain varieties of hostas or variegated forms of plants like pothos. These plants are often chosen for gardens or indoor settings primarily for the beauty of their foliage. The leaf arrangement of a plant, the structure of its blade and petiole, and adaptations such as a thick cuticle or air chambers might also be indicative of the plant's native environment or adaptational strategy.