毛山小橘(原变种) mao shan xiao ju (yuan bian zhong)

Trees to 3 m tall. Leaflet blades oblong to lanceolate, 7-9 × 2.5-3 cm, papery, base attenuate, apex acuminate. Inflorescences axillary, less than 3 cm, few flowered. Sepals broadly ovate, ca. 1 mm wide. Petals subelliptic. Stamens slightly longer than petals; filaments linear. Ovary conic to gourd-shaped at anthesis, slightly pubescent. Fruit reddish to orange, 0.8-1 cm in diam., 1-seeded. Fl. Apr-May, fr. Aug-Oct.

Hillside forests. S Yunnan [NE Thailand].