Description from Flora of China
Campanula nephrophylla C. Y. Wu.
Plants perennial. Roots thickened, often carrotlike, ca. 5 mm in diam. Caudex enveloped by remains of old petioles. Stems 2-7, caespitose, ascending, 6-33 cm tall, simple or rarely branched, glabrous. Basal leaves several, often rosulate, long petiolate; blade orbicular, cordate, or ovate, 7-35 × 6-20 mm, usually glabrous, sometimes adaxially sparsely hispid, margin crenulate. Lower cauline leaves petiolate; blade spatulate, elliptic, or ovate, 1-3 cm, margin crenulate. Upper cauline leaves subsessile; blade linear, margin entire or callose-denticulate. Flowers solitary, terminal, pendent or horizontal, glabrous throughout. Hypanthium obconic or campanulate; calyx lobes subulate or narrowly triangular, 3-12 × 1-2 mm, margin callose-denticulate. Corolla blue, blue-purple, or dark purple-red, campanulate, 12-26 mm; lobes ca. 1/2 as long as tube. Style included. Capsule oblong to narrowly obovoid, 10-18 mm, ca. 5 mm in diam. Seeds yellowish brown, oblong to elliptic, slightly compressed. Fl. Jul-Sep.
● Rocks, grassy slopes; 2600-4200 m. SW Sichuan (Muli), NW Yunnan.