单花忍冬 dan hua ren dong

Lonicera monantha Nakai.

Shrubs, deciduous, 1-2 m tall. Winter buds with several pairs of scales, inner ones accrescent and orbicular-ovate. Branches glandular and slightly setose or subglabrous. Petiole 3-7 mm; leaf blade oblong to ovate, 4-7 × 2.2-5 cm, both surfaces adpressed hispid and sparsely setose, base rounded to cuneate, margin bristly ciliate, apex mucronate or acute. Inflorescence reduced to a single flower or sometimes with a second flower partially developed, axillary at base of new shoots; flowers opening early in season; peduncle 0.5-1.2 mm at anthesis, accrescent to 25 mm in fruit, sparsely spreading glandular hairy; bract usually 1, sometimes with an opposite reduced bract, ovate-lanceolate, 7-14 mm, stiffly hairy and glandular hairy; bracteoles absent. Ovary with sparse glands. Calyx 0.3-0.5 mm, margin truncate to toothed. Corolla yellow, funnelform, 1.5-2 cm; tube gibbous toward base; lobes regular, to 1/2 as long as tube, outside hairy and sparsely glandular. Stamens and style glabrous, subequaling corolla. Berry red, fusiform or ellipsoid, 8-14 mm, glabrous; seeds 3.5-4 mm. Fl. May, fr. Jun.

Forests; ca. 800 m. Jilin, ?Liaoning [Korea, Russia].