Gentiana ×quaterna Harry Smith; G. ×quaterna subsp. longiflora Harry Smith.

Perennials 8-13 cm tall. Stems ascending, simple, papillate. Basal rosette leaves absent or poorly developed; leaf blade triangular, 3-7 × 1-1.5 mm, membranous, apex acute. Stem leaves in whorls of 4 (or 5), larger and more crowded toward apex, uppermost leaves surrounding calyx; leaf blade base connate for 2-3 mm, margin smooth, apex obtuse, midvein abaxially distinct. Lower to middle stem leaves oblong to ovate, 2-3 × 1-1.5 mm, apex acute; upper leaves linear-spatulate to narrowly oblong, 4-8 × 1-1.5 mm. Flowers terminal, solitary, sessile, 6-8-merous. Calyx tube narrowly obconic, 0.9-1.2 cm; lobes linear-spatulate to narrowly oblong, 4-5 mm, herbaceous, base narrowed, margin smooth, apex obtuse, midvein distinct. Corolla pale blue, with pale yellow base and dark blue stripes, tubular to tubular-campanulate, 4-4.5 cm; lobes ovate, 2-2.5 mm, margin denticulate, apex obtuse with a caudate tip less than 1 mm; plicae oblong to broadly ovate, 0.8-1 mm, margin denticulate, apex obtuse. Stamens inserted just below middle of corolla tube; filaments 0.9-1.1 cm; anthers ellipsoid, 2-2.5 mm. Ovary ovoid-ellipsoid, 7-8 mm; gynophore 0.9-1.1 cm. Style 4-4.5 mm; stigma lobes linear. Fl. Aug.

* Grassland slopes; 3300-4500 m. N and W Sichuan.