Flowering stem 35–50 cm long. Rhizome compact, 4–6 mm in diameter. Leaves basal and cauline, trifoliolate; leaflets ovate, 4.5–6 × 2.5–4 cm, vein evident, apex rounded, base deeply cordate with regularly rounded lobes, terminal leaflet with equal rounded lobes, lateral leaflets oblique with outer lobe large and rounded, inner lobe smaller and rounded, margin spinose-serrate, abaxially pilose. Flowering stem usually with 2 alternate (mostly 2 trifoliolate and occasional 1 trifoliolate and 1 unifoliolate) or opposite leaves, sometimes 3 alternate leaves, and 1 trifoliolate leaves also occasionally observed. Inflorescence panicle, 15–43-flowered, 11–23 cm long, almost glabrous. Flowers ca. 10 mm in diam., yellow, pedicels 1.2–1.8 cm long, glandular hairs. Outer sepals 4, green, broadly ovate, ca. 2 ×2.5 mm. Inner sepals 4, red-tinged, ovate, ca. 2.5–3 × 1–1.5 mm. Petals 4, yellow, spurless, ca. 6–8 × 5–7 mm, obovate, apex rounded. Stamens ca. 2.5 mm; anthers yellow, ca. 1 mm.

Epimedium campanulatum occurs in Dujiangyan, Sichuan, often on mountain slopes; 2000 m.

Epimedium campanulatum flowers from May to June, and fruits from June to July.

Only known from Dujiangyan, Sichuan, Epimedium campanulatum was designated as endangered (EN) according to the International Union for Conservation of Nature (IUCN) Red List criteria (IUCN 2015), because of environment deterioration.

China. Sichuan: Dujiangyan, Q. Wang, K. Yao, 9015 (PE), Z.B. Feng 960035 (HX), C. Zhang, Z.B. Feng 960055 (HX), C. Zhang, G.J. Wu 990210 (HX), S.X. Liu & L.J. Liu 2016028 (JXCM), T.T. Yu 801 (N).