Trigonotis chengkouensis W. T. Wang

Stems unbranched or with 1 lateral branch, slender, 10-28 cm tall, minutely strigose. Petiole of basal leaves slender, 1.2-3.8 cm; leaf blade ovate, 6-13 × 4-10 mm, abaxially sparsely minute strigose, adaxially densely minute strigose, base rounded-truncate, apex obtuse or apiculate; lateral veins obscure; stem leaves long or short petiolate; leaf blade narrowly ovate to elliptic, base rounded or broadly cuneate. Inflorescences 2.5-7 cm, to 7-19 cm in fruit, 9-18-flowered; bracts subtending lowermost 1 or 2 flowers only. Pedicel slender, 1.5-8 mm. Calyx lobes linear-obovate, ca. 0.9 mm, minutely strigose outside, apex obtuse. Corolla blue, glabrous; tube ca. 1 mm, faucal appendages low trapeziform, ca. 0.5 mm; limb ca. 4 mm wide; lobes 5, suborbicular. Anthers ca. 0.4 mm. Pistil ca. 0.9 mm. Nutlets blackish brown, bifacial-tetrahedral, smooth, glabrous, shiny, lateral surfaces forming an obtuse angle; abaxial surfaces ca. 0.8 mm, deltate-ovate; stipe indistinct, ca. 0.2 mm. Fl. and fr. Aug.

Sichuan.

* In rock crevices; ca. 1900 m.

Trigonotis chengkouensis là loài thực vật có hoa trong họ Mồ hôi. Loài này được W.T. Wang miêu tả khoa học đầu tiên năm 1986.