What defines a native plant?

• A. Has historic origins in the area and was not introduced by human activity.
• B. Was introduced to improve pest control.
• C. Can only grow in cultivation.
• D. Is always a perennial.

Answer: (B)

Native plants originate in a region and occur there naturally, having arrived and evolved in that landscape without human introduction. This history with the area means they’re adapted to local climate, soils, and interactions with native wildlife, which helps sustain the ecosystem and its pest–predator relationships in rangeland systems. The idea that a plant was introduced to improve pest control describes a non-native, human-introduced species, not a native one. A plant that can only grow in cultivation isn’t native, since natives can appear in wild, natural habitats as well. And native plants aren’t restricted to being perennials; many are annuals or biennials too. So the defining trait is historic origins in the area and lack of human introduction.