V-1: Highest Quality Native Ecosystems
V-1 units consist of the highest quality native ecosystems and communities. They Have minimal disturbance, with low levels (less than 10%) of non-native plants in any vegetative layer. Examples are portions of the Alakai Wilderness Preserve (Kauai), Eke Crater (Maui), Wright Road section of Puu Makaala NAR (Hawaii).

V-2: Predominantly Native Areas
V-2 units consist of areas in which native plants predominate in communities that are relatively intact, and are minimally disturbed. They have a significant component of non-native plants (more than 10%). Examples are the most native portions of some NARs and Forest Reserves.

V-3: Considerably Disturbed Areas
V-3 units consist of areas that had a considerable amount of disturbance. The vegetation in the area does not reflect a naturally evolved species composition, but rather a mixture of small remnant patches dominated by native plants, patches of largely invasive weedy alien plants, and areas of mixed native and non-native plants. Examples are portions of Puu Ka Pele Forest Reserve (Kauai), Puu Waawaa public hunting area (Big Island).

V-4: Badly Degraded Areas
V-4 Units are areas that are severely degraded or highly altered from their natural state. They may be lands that were cleared for other uses, or are currently eroded, forest plantations, or are dominated by non-native species. Examples are portions of the Kakaha Game Management Area (Kauai), and Puu Anahulu Game Management Area (Hawaii).