Elsholtzia oldhamii Hemsl.

The 4-ranked bracts in the protologue are an artifact of the immature state of the type collection. This and species 28–33 of this account are very closely related.

Herbs cobwebby pubescent. Stems with numerous ascending branches. Petiole 1.3-1.9 cm; leaf blade papery or ± membranous, ovate-lanceolate, 2.5-6.5 cm, sparsely minute hispid adaxially, sparsely fine cobwebby pubescent abaxially, base rounded to subcuneate, margin coarsely serrate-dentate, apex acuminate; lateral veins ca. 5-paired, conspicuous adaxially. Spikes axillary, 4-ranked when young, secund when mature, solitary, to 2.5 cm, dense, subsessile; bracts broadly spatulate-orbicular, pubescent, apex abruptly acuminate. Flowers minute (open flowers not seen). Calyx pubescent outside, glabrous inside, teeth subequal. Corolla 4-lobed, upper lobe or lip emarginate. Stamens glabrous; anthers distinctly 2-locellate (specimens not seen).

* Taiwan