193. Gentiana macrauchena C. Marquand, Bull. Misc. Inform. Kew. 1931: 85. 1931.
大颈龙胆 da jing long dan
Gentiana incompta Harry Smith.
Annuals 3-7 cm tall. Stems dark brown, ascending to erect, stout, much branched from base, glabrous. Basal leaves withered at anthesis; petiole 1-2 mm, glabrous; leaf blade involucriform, ovate to ovate-orbicular, 8-10 × 5-7 mm, margin cartilaginous and smooth, apex obtuse to rounded and mucronate, midvein distinct. Stem leaves 2-4 pairs, widely spaced; petiole 1.5-2 mm, entirely connate, membranous; leaf blade lanceolate to oblong, 4.5-6 × 1.5-2 mm, shorter than internodes, margin broadly membranous, apex obtuse, midvein distinct. Flowers few. Pedicel 2-4 mm, stout, to 1.2 cm in fruit. Calyx narrowly obconic, 8-11 mm; lobes broadly triangular, 2.5-3 mm, margin membranous, apex acute, midvein distinct. Corolla blue, tubular, 1.3-1.5 cm; lobes ovate, 2-3 mm, margin entire, apex obtuse; plicae ovate, 1-1.5 mm, margin entire, apex obtuse. Stamens inserted at middle of corolla tube, equal; filaments 2-3 mm; anthers ellipsoid, 1.3-1.5 mm. Capsules obovoid, 4.5-5.5 mm; gynophore to 5 cm, stout. Seeds brown, triquetrous-ellipsoid, 0.8-1 mm. Fl. and fr. Apr-Jul.
* Roadside and grassland slopes, valleys, scrub, forests; 800-2800 m. W Hubei, S Shaanxi, E Sichuan, SE Xizang.