Isodon grosseserratus (Dunn) Kudô

Herbs perennial. Stems erect, 50-80 cm, much branched, branches and stem sparingly retrorse white puberulent. Petiole 2-10 mm; leaf blade broadly ovate, 5.5-12 × 3.5-6.5 cm, papery, adaxially minutely hispid, sparsely pilose on veins, abaxially sparsely golden glandular, sparsely pilose on veins, base abruptly attenuate-decurrent, margin coarsely serrate, apex acuminate, apical tooth lanceolate, lateral veins 3- or 4-paired. Panicles narrow, terminal and axillary, to 20 cm, pubescent; cymes widely spaced, pedunculate, 3-flowered; lower floral leaves sessile, margin remotely serrate or entire, longer than cymes; upper floral leaves bractlike, shorter than cymes. Pedicel ca. 5 mm. Calyx broadly campanulate, ca. 4 mm, pubescent, glandular, obviously 2-lipped; teeth acuminate, upper 3 triangular-lanceolate, lower 2 lanceolate; fruiting calyx to 8 mm. Corolla blue or pink, to 1 cm, sparsely pubescent, glandular, tube ca. 5 mm, upper lip ca. 4 mm, lower lip ca. 5 mm. Stamens included. Style included. Nutlets yellowish brown, ovoid, ca. 1.2 mm, glabrous. Fl. Jul-Oct, fr. Sep-Oct.

Sichuan.

* Grassy slopes, forest margins, valleys; 1600-2600 m.

Plectranthus grosseserratus Dunn, Notes Roy. Bot. Gard. Edinburgh 8: 156. 1913; Rabdosia grosseserrata (Dunn) H. Hara.