鴛鴦湖龍膽

Annual herbs. Stems usually branched, brown, brownish purple or purple, densely scabrous, 4-8 cm tall. Leaves aristate-acuminate at apices, slightly scabrous along margins; radical leaves lanceolate or ovate, about 2 cm long, 7-8 mm wide; cauline-leave shape almostly same to radical-leave but smaller in size, 5-10 mm long, 3-4 mm wide. Flowers pedicellate, solitary on terminal branches; pedicels 2-4 mm long, extending to 10 mm long in fruit; calyx-tube campanulate, 3.5-5 mm long, with 5 slightly scabrous costae, 5-lobed, the lobes linear, 1.5-2.5 mm long, with obscurely erose costae, almostly entire along margins; corolla tubular-campanulate, white with yellow or greenish yellow spots in the middle part, 12-16 mm long, sinuses plicate with ovate-triangular appendages, appendages acute or cuspidate near apices, almost entire near both extremes, anthers pink to light red, 1.5-2 mm long, the filaments 6-8 mm long, attached slightly above the lower-part of corolla-tube; ovary stipitate, lanceolate to narrow ovate, 6-7 mm long, 2-3 mm wide, stipe 2-3 mm long, style 2-3 mm long, the stigma bifurcate and spirally recurve at bloom. Capsules obovate, about 6 mm long, 3 mm wide, with long stipes about 15 mm long, 2-valved, the valves slightly dentate near apices, exserted beyond the persistent corolla. Seeds ovoid, with minutely longitudinal reticulate-striae, about 0.7 mm long, 0.4-0.5 mm wide.

TYPE: Taiwan, Hsinchu Hsien: Chienshih Hsiang: Yuanyanghu (a lake) Nature Preserve, C. H. Chen 1707, 16 May 1996 (Holotype: TNU; isotype: HAST, TNU).

MIAOLI HSIEN: Kuanwu, Huang 1901 (TNU), same loc., Wang 9264 (TNU). same loc., ca. 1800m, C. H. Chen 801 (TNU). HSINCHU HSIEN: Yuanyanghu, elev. ca. 1670m, C. H. Chen 845, 965, 1707 (TNU); same loc., M. H. Chen 180 (HAST); same loc., Wang 1313 (HAST). ILAN HSIEN: Taipingshan, elev. ca. 2100m, C. H. Chen 960, 1657 (TNU); same loc., elev. ca. 1970m, Huang 10774 (TAI); same loc., elev. ca. 1950m, Peng 7858 (HAST); same loc., elev. ca. 1970m, Yang 10774 (TAI).

Distribution and habitat. Endemic to Taiwan, Frequently found on shady grasslands or roadsides on northern part of the Central Mountain Range from 1,600 to 2,200 m in elevation. Flowering and Fruiting Jun-Sep.

Notes. The taxon has been found in the northern part of Central Mountain Range and was previously treated as G. flavo-maculata Hayata. The gross morphology of this variety is rather similar to species of G. flavo-maculata Hayata that distributes in the central and the southern part of Central Mountain Range. But from authors’ detailed comparison, the variety is different from G. flavo-maculata in the anther color that is pink to light red, smaller size of plants, and slightly shorter corolla tubes.