Genera Incertae Sedis
DescriptionPerennial, glandular herb, shortly rhizomatous with fine, fibrous roots and small woody tubers; stem simple, 4-angled, erect, sweetly aromatic when dry; leaves opposite, ovate-oblong, toothed, petiolate; inflorescence forming a lax, terminal raceme-like thyrse of subsessile 3-flowered cymes in the axils of bracts; bracts short, lanceolate; bracteoles inconspicuous, minute; flowers fairly long-pedicellate; calyx campanulate, 2-lipped, 5-lobed (3/2), posterior lip 3-lobed, lobes mucronate, anterior lip longer, 2-lobed, calyx-tube 11-nerved, annulate, slightly accrescent in fruit; corolla very pale violet, 2-lipped, 5-lobed (2/3), posterior lip deeply 2-lobed, weakly hooded, sparsely hairy externally, anterior lip spreading, 3-lobed, lobes subequal, rounded, corolla-tube short and broad, straight; stamens 4, didynamous, included in corolla-tube, anterior pair slightly longer, inserted in middle of corolla-tube, anthers 2-thecous, thecae rounded, parallel, separate; style shorter than corolla; stigma-lobes short, subequal; nutlets 4, ovoid, smooth, compressed. One species, O. dulcis Hand.-Maz., China.
Ombrocharis Hand.-Maz., Symb. Sinic. 7: 925 (1936); Li Xi-wen and Hedge in Wu Zheng-yi and Raven (eds). Flora of China 17: 177 (1994).
© Royal Botanic Gardens, Kew