上思耳草 shang si er cao

Herbs or subshrubs, erect, to 50 cm tall; stems terete, glabrous, smooth. Leaves petiolate; petiole 3-5 mm, glabrous; blade lanceolate or oblong-lanceolate, 5-7 × 1-1.5 cm, base cuneate or obtuse, apex acuminate or acute; secondary veins ca. 3 pairs but very indistinct; stipules fused to petiole bases, broadly ovate, ca. 3 mm, abruptly narrowed apically to acute, marginally weakly glandular-serrulate. Inflorescences terminal, compound-cymose, 7-12 cm, several to many flowered; secondary axes few, racemiform, 3-4 cm, higher order axes shorter, becoming scorpioid; bracts linear-lanceolate or linear, 0.8-1.2 cm. Flowers pedicellate and/or sessile. Calyx glabrous; hypanthium portion ovoid, 1-1.2 mm; lobes triangular-ovate, ca. 0.5 mm. Corolla white, outside glabrous; tube ca. 1.5 mm, inside densely bearded; lobes broadly ovate, rounded. Fruit capsular, oblong-ellipsoid, 2-2.5 × ca. 1.5 mm, septicidally then loculicidally dehiscent; seeds several, black. Fl. Jun-Jul.

● Dry open fields, mountain slopes. Guangxi (Shangsi).