6. Swertia forrestii Harry Smith, Notes Roy. Bot. Gard. Edinburgh. 26: 258. 1965.
紫萼獐牙菜 zi e zhang ya cai
Perennials 20-25 cm tall. Rhizomes blackish, short, with few slightly fleshy rootlets. Stems erect, striate, simple, base sheathed by blackish remains of old petioles. Basal leaves petioles flattened, 1.5-5.5 cm; leaf blade folded, narrowly oblong to lanceolate, 4-10 × 0.8-1.5 cm, base narrowed and decurrent into wings of petiole, apex obtuse, veins 3-7. Stem leaves alternate, sessile, ± lanceolate, 1.5-2.5 cm × 6-10 mm, base rounded, subamplexicaul, and decurrent into narrow wings along stem, apex acute, veins 3-5. Inflorescences racemelike, 6-20 cm, 4 or more flowered. Flowers 5merous. Pedicel spreading, 1.2-3 cm, stout. Calyx lobes green, sometimes tinged blue-purple, ovate-lanceolate, 1.1-1.6 cm × 4-7 mm, slightly unequal, foliose, base rounded to cordate, apex acute, veins 1-3. Corolla dark blue to blue-purple, 1.5-2 cm in diam., tube 1.5-2 mm; lobes ovate-lanceolate, 1.3-1.8 cm × 5-6 mm, margin entire, apex acute. Nectaries 2 per corolla lobe, cupular, with pilose fimbriae 2-2.5 mm. Filaments 7-8 mm, base fimbriate-barbate; anthers blue, ellipsoid, 2-2.5 mm. Style indistinct; stigma lobes suborbicular. Capsules ellipsoid, 8-10 mm. Seeds light brown, subglobose, both ends and edges with irregular narrow wings. Fl. Aug.
* Scrub, alpine meadows; 3400-4200 m. NW Yunnan.