Xantolis longispinosa (Merr.) H. S. Low

Shrubs or trees, 8--9(--13) m tall. Bark grayish yellow to grayish black. Branchlets glabrous with occasional spines; spines 1.5--3.5 cm, erect, hard, and cuspidate. Petiole 1--3 mm; leaf blade usually obovate, 2--4(--8) X 1--2.3(--3) cm, base cuneate, apex rounded to obtuse, lateral veins ca. 10 pairs. Flowers solitary or in several-flowered clusters. Pedicel 3--5(--8) mm, rust colored pubescent. Sepals 5, ovate, 5--6 mm, both surfaces rust colored pubescent. Corolla white; lobes 5, outside pubescent on middle part but glabrescent, inside sparsely villous. Stamens 5; filaments thick with a cluster of rust colored villous hairs on each side at base; staminodes 5, lanceolate to ovate, margin yellowish brown pubescent. Ovary subglobose, ca. 1.5 mm, densely rust colored pubescent. Style ca. 3 mm. Fruit green becoming pale brown, subglobose to subellipsoid, 1.2 cm, glabrous or appressed rust colored tomentose, with a ca. 1.2 cm persistent style and enlarged calyx; stalk of fruit 8--10 mm, glabrous. Seeds subglobose, slightly compressed, ca. 8 mm in diam., glossy brown; scar elliptic. Fl. Oct-Feb, fr. Jun-Oct.

Forest at low to middle altitudes. Hainan.

Sideroxylon longispinosum Merrill, Lingnan Sci. J. 13: 66. 1934; S. embelifolium Merrill; Xantolis embelifolia (Merrill) P. Royen.

Xantolis longispinosa là một loài thực vật có hoa trong họ Hồng xiêm. Loài này được (Merr.) H.S.Low miêu tả khoa học đầu tiên năm 1974.

琼刺榄（学名：Xantolis longispinosa）为山榄科刺榄属下的一个种。