台湾荠苎 tai wan qi zhu

Mosla lysimachiiflora Hayata; Orthodon formosanus (Maximowicz) Kudo; O. lysimachiiflorus (Hayata) Masamune.

Stems erect, branched, subglabrous. Petiole 3-12 mm, adaxially slightly scaly puberulent; leaf blade ovate to ovate-lanceolate, 1.5-3 × 0.7-1.5 cm, subglabrous, abaxially sparsely impressed glandular, base broadly cuneate, margin crenate-serrate, apex obtuse to acute. Racemes 3-9 cm, finely puberulent; bracts lanceolate, 1.5-2.5 mm, subglabrous, apex acute. Pedicel 1.5-2.5 mm. Calyx ca. 2 × 2 mm, dilated to ca. 5 × 3 mm in fruit, sparsely fine glandular hairy, veins finely pilose; upper teeth triangular, obtuse, middle tooth shorter. Corolla ca. 5 mm, puberulent, without hairy annulus inside, upper lip straight. Style exserted. Nutlets yellow-brown, ovoid, ca. 1 mm, loosely netted, areolae indistinct. Fl. and fr. Oct.

Taiwan [Philippines].