Meehania triangularis Z.F.Bai & Xue L.Chen sp. nov., Figs. 2–3

Type:— CHINA. Chongqing: Wushan county, Grows in broad-leaved forests, elev. 1500 m, north wushan, Dr. Aug. Henry 7088 (holotype K, barcode K000249197; isotypes K, barcode K000249200).

Diagnostic characters:— Meehania triangularis is morphologically similar to M. faberi. However, the new species differs in its leaf shape, indumentum distribution, and floral characteristics, possessing triangular-cordate, non-succulent leaves, a pale purple to nearly white corolla, and relatively small flowers.

Description. Perennial herb. Roots numerous, rhizome very short. erect, 12–40 cm high, solitary or tufted. Stems pubescent on upper parts and nodes; lower stem sparsely pubescent when young, becoming glabrescent with age.Leaves 3–5 pairs per stem, papery, triangular-cordate, 3–7× 1.4–5.5 cm, both surfaces sparsely strigose, margin sparsely crenate-dentate with obtuse teeth; petiole 0.5–4.5 cm long, adaxial groove densely glandular-pubescent. Inflorescence usually with paired flowers borne in axils of upper 2–3 nodes, or arranged in axillary false racemes of approximately 10 flowers; bracts leaf-like, gradually reduced upward or lanceolate; bracteoles paired, small, subulate or lanceolate.Pedicels 2.5–4 mm, pubescent.Calyx narrowly tubular, 1–1.4 cm long, externally sparsely pubescent, glabrous within; calyx bilabiate, 5-lobed; upper lip 3-lobed, lower lip 2-lobed, upper lip slightly longer than lower; calyx lobes lanceolate, 3–5 mm, margin ciliate, apex acuminate. Corolla white with faint purple tinge on limb, 2.4–3.7 cm long; externally sparsely pubescent, glabrous within; tube straight, tubular, gradually expanded in upper half; limb bilabiate; upper lip erect, shallowly 2-lobed; lower lip 3-lobed, median lobe suboblong, often notched in the middle, lateral lobes oblong, ca. half as long as median lobe.Stamens 4, 4–10 mm long, included; The posterior pair of stamens are inserted at the corolla throat, while the anterior pair are inserted midway down the corolla tube; filaments slightly flattened, glabrous; anthers dithecal, becoming confluent at maturity. Ovary 4-parted, densely short-pubescent. Style slender, included, apex bifid. Disk annular, lobes inconspicuous. Flowering June to July, fruiting July to August.

Phenology: Flowering June to July, fruiting July to August.

Etymology: The Chinese name is proposed as “sān jiǎo yè lóng tóu cǎo (三#叶±头ặ)”.

Distribution and habitat: Meehania triangularis is primarily distributed in broad-leaved forests or thickets in Gansu and Chongqing, at elevations of 1800–2700 m.(Fig 5).

Additional specimens examined: CHINA. Gansu: Zhouqu County, 2300 m, 28 June 1951, T. P. Wang 14232 (PE00787146 photo!, WUK0049498 photo!); Chongqing: Wushan county, 1850 m, 16 June 2025 Z.F. Bai Xue L.Chen & S.R. Yi 20250616005, 20250616006, 20250616007 (NWTC).