Rubus oblongus T. T. Yu & L. T. Lu

Shrubs climbing. Branchlets grayish brown or brown, yellowish to grayish yellow tomentose, gradually glabrescent, with sparse, curved small prickles. Leaves simple; petiole 0.8–1.5 cm, yellowish or yellowish gray tomentose, glabrate in age, with sparse, curved minute prickles; stipules oblong-lanceolate, ca. 1 cm in diam., tomentose-villous when young, glabrescent, margin entire, rarely apically lobed; blade narrowly oblong or oblong-lanceolate, 10–15 × 1.5–3(–4) cm, lateral veins 8–11 pairs, prominent abaxially, leathery, abaxially densely yellowish tomentose, base broadly cuneate to rounded, margin with sparse, shallow sharp serrations, apex caudate. Inflorescences terminal and axillary, short racemes, axillary ones 3–4 cm, terminal ones longer; rachis and pedicels densely yellowish tomentose; bracts oblong-lanceolate, 5–9 mm, tomentose-villous, margin entire, rarely lobed. Pedicel 1–1.5 cm. Calyx abaxially densely tomentose-villous; sepals ovate-lanceolate or triangular-lanceolate, 6–9 mm, margin entire, apex acuminate to shortly caudate. Petals suborbicular, shorter than sepals, slightly pubescent basally, claws nearly absent. Stamens many; filaments broad, complanate, soft hairy or long hairy only on anthers. Pistils longer than stamens; style and ovary glabrous. Aggregate fruit red at maturity, subglobose, glabrous; pyrenes rugulose. Fl. May–Jun, fr. Jul–Aug.

Guizhou, Yunnan.

Dense forested slopes, thickets; 1700--2100 m.

Rubus oblongus là loài thực vật có hoa trong họ Hoa hồng. Loài này được T.T. Yu & L.T. Lu miêu tả khoa học đầu tiên năm 1982.

长圆悬钩子（学名：Rubus oblongus）为蔷薇科悬钩子属的植物，是中国的特有植物。分布于中国大陆的四川、贵州等地，生长于海拔1,700米至2,050米的地区，一般生于山坡密林及杂木林内，目前尚未由人工引种栽培。