Trigonotis formosana var. elevatovenosa (Hayata) S. D. Shen & J. C. Wang

Herbs perennial, with thin runners, 15-20 cm tall. Stems erect, not branched, 10-20 cm tall, spreading hispid and strigose at base. Petiole of basal leaves long, 3-4 cm, red-brown hirsute; leaf blade elliptic, 2-2.5 × 1-1.3 cm, with 4 or 5 pairs of lateral veins, abaxially pallid, appressed pubescent, adaxially green, convex, base obtuse, margin entire or crispate, apex rounded, ± emarginate, mucronate; stem leaves of runners short petiolate, smaller, orbicular, ca. 8 mm. Inflorescences erect, racemelike, dichotomously branched or single, long, ca. 8 cm, thin; bracts absent. Pedicel erect, 1-3 mm. Calyx lobes obovate-spatulate, ca. 1.5 mm, apex obtuse. Corolla white; tube ca. 1.5 mm; limb 4-5 mm wide; lobes ovate, 1.5-2 mm. Stamens inserted on upper 2/3 of corolla tube; anthers elliptic, 0.5-0.7 mm. Mature nutlets black-brown, inverted subulate, trigonous-tetrahedral, 0.8-1 mm, glabrous, shiny, adaxial 3 surfaces subequal in size; abaxial surfaces triangular, acutely 3-ribbed, sessile.

* Mountains. N Taiwan.