松潘荆芥 song pan jing jie

Herbs erect or suberect. Stems ca. 90 cm, much branched, puberulent. Petiole 2-10 mm, densely puberulent; leaf blade ovate-lanceolate to narrowly ovate, 1.5-3 × 1-2 cm, adaxially olive green, densely puberulent, abaxially greenish, densely puberulent, impressed glandular, base rounded to truncate, margin incised-serrate, apex short acuminate to acute. Cymes dichotomous, in upper leaf axils; peduncle 2-10 mm; bracts and bracteoles minute, subulate. Pedicel 1-1.5 mm, puberulent. Calyx campanulate, 5-6 mm, dilated and urceolate in fruit, 11-15-veined, pubescent, mouth regular; teeth lanceolate to triangular-ovate, 1.2-3 mm, posterior 3 slightly longer. Corolla blue, ca. 2.2 cm, puberulent; upper lip straight, 2-4.5 mm; middle lobe of lower lip subcircular, ca. 6 mm wide, base abruptly clawed, margin undulate, apex slightly emarginate; lateral lobes short, indistinct. Nutlets ovoid, slightly flattened, ca. 1.5 × 1.2 mm, distinctly or indistinctly warty. Fl. Sep-Oct, fr. Oct-Nov.

* Open hillsides, wasteland adjacent to cultivated areas; 1700-2200 m. Sichuan (Songpan Xian)

Two varieties are sometimes recognized: var. sungpanensis has calyx 11–13-veined, with triangular-ovate teeth 1.2–1.5 mm, and distinctly warty nutlets; and var. angustidentata C. Y. Wu & Y. C. Huang (Fl. Reipubl. Popularis Sin. 65(2): 590. 1977) has calyx 13–15-veined, with lanceolate teeth ca. 3 mm, and nutlets indistinctly warty.