Description from Flora of China
Orthodon longispicus C. Y. Wu, Acta Phytotax. Sin. 10: 231. 1965.
Taproots cylindric. Stems erect, ca. 40 cm tall, much branched from base; branches nearly as long as stem, with numerous fertile branchlets; branches and stem brown-red, sparsely tawny or white floccose-pubescent, few leaved. Petiole 1-4(-15) mm; leaf blade linear, 0.7-1.5 cm × 2.5-6 mm, papery, densely fine tawny pilose, sometimes sub-glabrous, glandular, densely so abaxially, base attenuate, margin few serrate, apex obtuse to acute. Racemes numerous, 1.5-10 cm; bracts ovate-lanceolate, 4-4.5 × 1.7-2 mm, apex abruptly acuminate. Pedicel 1-1.5 mm after anthesis, densely villous. Calyx ca. 2.5 × 2 mm, densely grayish yellow villous especially on veins, bearded apex just below middle lobe of lower lip inside; tube ca. 2 mm, gradually dilated upward; upper lip erect, emarginate; lower lip 3-lobed, middle lobe crenate. Nutlets gray, 1 at maturity, globose, ca. 1.2 mm in diam., pitted with small depressions. Fl. and fr. Nov.
* Roadsides; ca. 1100 m. Jiangxi.