nThunbergiaa genus of herbs or vines of the family Acanthaceae
Century Dictionary and Cyclopedia
nthunbergiaA genus of gamopetalous plants, type of the tribe Thunbergieæ in the order Acanthaceæ. It is distinguished from Mendoncia, the other principal genus of its tribe, by its fruit, a beaked capsule with two to four seeds; and from others of the order by its contorted and nearly equal corolla-lobes, and roundish seeds without a retinaculum. There are about 45 species, natives of tropical and southern Africa, Madagascar, and warm parts of Asia. They are commonly twining vines, or in a number of species low erect herbs. They bear opposite leaves, often triangular, hastate. cordate, or narrower, and purple, blue, yellow, or white flowers solitary in the axils or forming terminal racemes. The flowers often combine two colors, as T. laurifolia (T. Harrisi), a greenhouse climber with large yellow-throated blue flowers, and the hardy annual T. alata, known locally by the name black-eyed-Susan from its buff, orange, or white flowers with a purplish-black center. Other species, as T. grandiflora, are favorite trellis-climbers, and commonly known by the generic name.
This resupination is not uncommon in the order; it is most evident in Thunbergia coccinea, in which the racemes are always pendulous.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith