To answer this question, we need to understand what a herbaceous plant is.
A herbaceous plant is a type of plant that has soft, green, and non-woody stems. These plants typically die down to the ground at the end of the growing season and do not have persistent above-ground woody stems.
Let's go through each option to determine which one is not a herbaceous plant:
Option A) Buttercup - This option is a herbaceous plant. Buttercups have soft, green stems and do not have persistent above-ground woody stems.
Option B) Clover - This option is a herbaceous plant. Clovers have soft, green stems and do not have persistent above-ground woody stems.
Option C) Marigold - This option is a herbaceous plant. Marigolds have soft, green stems and do not have persistent above-ground woody stems.
Option D) Sycamore - This option is not a herbaceous plant. Sycamores are trees and have persistent above-ground woody stems. They are not herbaceous plants.
The correct answer is Option D) Sycamore. This option is not a herbaceous plant because it has persistent above-ground woody stems.