Ilex arisanensis Yamam.

Trees evergreen, small. Branchlets deep brown-purple, slender, glabrous; older branchlets gray-brown, terete, longitudinally rugose, with sparse small lenticels. Petiole 5-8 mm, adaxially sulcate, glabrous; leaf blade abaxially pale brown-green, adaxially dark brown-green, lanceolate or narrowly elliptic, 5-8 × 1.5-2.5 cm, papery, both surfaces glabrous, midvein impressed adaxially, lateral veins 7-12 pairs, raised abaxially, slightly impressed adaxially, anastomosing near margin, base acute or cuneate, margin serrulate, apex caudate, acumen (1.5-)1.8-2(-2.2) cm. Flowers not known. Infructescences: 1-fruited cymes, fasciculate, fascicles 4-6-fruited, axillary; fruiting pedicels ca. 3.5 mm, glabrous; bracteoles basal, oblong, ca. 1 × 0.5 mm, puberulent. Fruit red, globose, 3-5 mm in diam., longitudinally sulcate; persistent calyx explanate, shallowly 4-lobed, lobes ovate, glabrous; persistent stigma mammilliform, shallowly 4-lobed; pyrenes 4, obovoid, transverse section compressed deltoid, abaxially longitudinally and slightly palmately striate. Fl. unknown, fr. Jun.

Taiwan (Ali Shan).

● Forests, mountains; ca. 800 m.

Ilex arisanensis is a species of plant in the family Aquifoliaceae. It is endemic to Taiwan. It is threatened by habitat loss.