Melicope stonei is an endemic tree species discovered from Kaua‘i, Hawaiian Islands.

[1] Melicope stonei is a tree (3–)5–12 m tall, trunks up to 25 cm diameter, bark smooth, mottled gray to light brown, new growth and young branchlets tomentose, yellow-tan, glabrate in age.

Capsules medium to dark green when fresh, irregularly pusticulate, 5–9 × 15–21 mm, of 4 distinct follicles, slightly ascending, occasionally 1 or more abortive, exocarp glabrous, glandular punctate, endocarp glabrous.

[1] Melicope stonei is named in honor of Benjamin Clemens Masterman Stone, British-American botanist, born in Shanghai, China (1933-1994).

Earliest known collections of Melicope stonei were made by David Lorence and Timothy Flynn (National Tropical Botanical Garden) as far back as February 1988 within the forests of Mākaha Valley, Kaua‘i.