26. Trigonotis tenera I. M. Johnston, J. Arnold Arbor. 21: 56. 1940.
蒙山附地菜 meng shan fu di cai
Herbs perennial, densely cespitose, with short thick caudex and withered petioles. Stems numerous, cespitose, prostrate to ascending, 10-16 cm tall, sparsely strigose. Basal leaves numerous; petiole 0.3-1.8 cm, base expanded becoming sheathy, ciliate; leaf blade cordate to orbicular-ovate, 0.5-3 × 0.5-1.5 cm, finely strigose, base cordate, rarely rounded, apex acute; upper and middle stem leaves few, with smaller blade and petiole 4-5 mm. Inflorescences terminal, 5-9 cm; bracts basal, 2 or 3, leaflike. Pedicel filiform, 0.8-2 cm. Calyx lobes lanceolate, 0.5-2 mm at anthesis, slightly enlarged in fruit, apex acute. Corolla blue; tube ca. 1.5 mm; throat appendages ca. 0.5 mm; limb ca. 3 mm wide; lobes divaricate, suborbicular, ca. 1.5 mm. Stamens inserted on middle of corolla tube; anthers oblong, ca. 0.5 mm. Nutlets dark brown, oblique subulate, trigonous-tetrahedral, vertical, 1-3 mm, sparsely pubescent, adaxial 3 surfaces slightly convex, bottom surface smaller than 2 subequal lateral surfaces, longitudinally ribbed at juncture of lateral surfaces; abaxial surfaces convex or somewhat flat, ovate, acutely 3-ribbed, apex acute; stipe ca. 0.3 mm, straight to ± curved. Fl. Aug.
* Moist forests, forest margins, crevices; ca. 900 m. Henan, Shandong.