Hjertson, M. (2006) Lindenbergia in Flora of Somalia 3: 282-284
Plants herbs, subshrubs, or shrubs; stems usually pubescent to pilose, rarely almost glabrous. Leaves all opposite or the upper leaves alternate, usually petiolate, rarely sessile; blades pinnately veined, usually serrate, dentate, or crenate, rarely entire. Inflorescences usually terminal, rarely axillary, racemes or solitary flowers; bracts leaflike; bracteoles usually absent, occasionally 1 present, linear. Flowers yellow, often with reddish brown marks; calyces 5-lobed; corolla tubes cylindrical; corolla limbs 2-lipped, upper lips internal prior to anthesis, retuse to 2-lobed, lower lips 3-lobes, lobes more or less spreading, rounded, middle lobes often rectangular; stamens 4, 2 long and 2 short, included, inserted on the corolla tube, above the base; anthers with 2 distinct, stipitate thecae, all pollen-containing; ovaries ovoid, 2-celled; styles filiform. Fruits longitudinally dehiscent capsules; seeds numerous, minute, ellipsoidal, usually somewhat furrowed longitudinally, primarily smooth, rarely deeply reticulate, sometimes secondarily reticulate with tertiary, adnate, hook-like structures.
Lindenbergia includes 12 species. The grow from northeast Africa through Arabia, Iran, Pakistan, India, Nepal, and Bhutan to Thailand, Indochina, China and the Philippines.