Final answer:
The specific number of native and naturalized vascular plant species in Arkansas is not provided, but vascular plants are a dominant group globally, representing over 90% of Earth's vegetation.
Step-by-step explanation:
The question about the number of species of native and naturalized vascular plants found in Arkansas relates to the study of the state's flora which encompasses broad biodiversity. While the specific number of vascular species within Arkansas is not provided in the reference material, the information underscores the significance of vascular plants globally, noting that they represent more than 90% of Earth's vegetation. In general, vascular plants are those that have specialized tissue for conducting water and nutrients, and this group includes the vast majority of recognizable plants. It's also important to understand that invasive and naturalized species can impact local ecosystems, and their monitoring is essential for conservation efforts.