18. Ajuga linearifolia Pampanini, Nouv. Giorn. Bot. Ital., n.s. 17: 703. 1910.
线叶筋骨草 xian ye jin gu cao
Ajuga pachyrrhiza Kitagawa.
Herbs erect, branched, perennial. Stems 25-40 cm tall, white glandular villous or glandular lanate, purplish red, young branches green. Leaves subsessile; leaf blade linear-lanceolate to linear, 4-9 × 0.5-1.5 cm, adaxially sparsely strigose, abaxially hairy on veins, base attenuate-decurrent, amplexicaul, margin ± incised to undulate, villous-ciliate, apex rounded. Verticillasters forming ill-defined terminal spikes. Calyx funnelform, 6-7 mm; teeth narrowly triangular to linear-lanceolate, to 3/5 as long as calyx, apically acuminate, margin densely villous-ciliate. Corolla white or bluish, with purple-blue spots, tubular, erect, included, sparsely puberulent, villous annulate inside; upper lip straight, rounded, apex emarginate; lower lip 6-8 mm, middle lobe flabellate, apex rounded to emarginate; lateral lobes linear-oblong. Nutlets areole nearly as long as adaxial side of nutlet. Fl. Apr-May(-Nov), fr. Jun(-Nov).
* Dry, grassy slopes, ravines; 700-900 m. Hebei, Hubei, Liaoning, Shaanxi, Shanxi.