Description from Flora of China
Gentiana grandis Harry Smith, Anz. Akad. Wiss. Wien, Math.-Naturwiss. Kl. 63: 100. 1926.
Annuals or biennials 25-50 cm tall. Stems erect, to 5 mm in diam., usually branched from base. Basal leaves crowded, short petiolate; leaf blade spatulate to elliptic, 0.5-1.5 cm × 5-8 mm, base narrowed, apex obtuse, midvein distinct. Stem leaves 3-6 pairs, sessile, narrowly lanceolate, 4-8 cm × 3-6 mm, margin slightly revolute, apex acute, midvein distinct. Pedicel erect, 5-16 cm, subquadrangular. Calyx narrowly funnelform, 3.5-7 cm; outer lobes linear-lanceolate, 2.5-5 cm, apex caudate; inner lobes triangular-lanceolate, 1.5-2.5 cm, apex acute; all lobes with margin broadly membranous. Corolla blue, sometimes pale yellow basally, funnelform, 5-10 × 1-1.7 cm; lobes elliptic, 2-3 × 1-1.5 cm, apex obtuse and crenulate, margin long laciniate-fringed basally. Nectaries suborbicular. Filaments 1.7-2.1 cm; anthers narrowly ellipsoid, ca. 3 mm. Style linear, 3-5 mm. Capsules as long as corolla; gynophore present. Seeds brown, ellipsoid, ca. 1 mm. Fl. and fr. Jul-Oct.
* Stream and river banks in valleys, hillsides; 2000-4100 m. SW Sichuan, NW Yunnan.