The smallest of Hawaii's eight main volcanic islands which is home to the rare flowering plant, Euphorbia skottsvergii, get's how many cm of rainfall on average annually?
Euphorbia skottsbergii: Euphorbia skottsbergii (syn. Kahoolawe: Kahoʻ olawe ( ; Hawaiian: ] ) is the smallest of the eight main volcanic islands in the Hawaiian Islands. Kahoolawe:  Kahoʻ olawe is relatively dry (average annual rainfall is less than 65 cm ) because the island's low elevation fails to generate much orographic precipitation from the northeastern trade winds, and Kahoʻolawe is located in the rain shadow of eastern Maui's 10023 ft volcano, Haleakalā.
65