台湾龙胆 tai wan long dan

Gentiana angusta (Masamune) Liu & Koo (1974), not M. E. Jones (1908); G. scabrida Hayata var. angusta Masa-mune.

Annuals 10-15 cm tall. Stems purple, erect, rigid, fastigiate branched from base, densely papillate. Leaf blade abaxially glabrous, adaxially papillate, apex acuminate and apiculate. Basal leaves with petiole 2-4 mm, papillate; leaf blade lanceolate to ovate, 1-2 cm × 5-7 mm. Stem leaves widely spaced, petiolate; leaf blade linear-lanceolate to lanceolate, 0.8-1.5 cm × 3-5 mm, shorter than internodes. Flowers few. Pedicel purple, 2-3 mm, densely papillate. Calyx narrowly obconic, 1-1.3 cm; lobes elliptic-lanceolate, 6-7 mm, subequal, as long as to slightly longer than tube, base slightly narrowed, apex acuminate to obtuse, midvein prominent. Corolla blue, tubular to funnelform, 2-2.5 cm; lobes broadly ovate, 4.5-5.5 mm, margin entire, apex obtuse and mucronate; plicae ovate-elliptic, 3.5-4 mm, margin entire or denticulate, apex obtuse. Stamens inserted at middle of corolla tube, equal; filaments 8-10 mm; anthers narrowly ellipsoid, 2.5-3 mm. Style 7-8 mm; stigma lobes oblong. Capsules exserted from corolla, narrowly obovoid to obovoid, 8-10 mm. Fl. and fr. Jul.

* Hillsides in mountains; ca. 3200 m. Taiwan.