|Dicotyledon|| Literature for Thunbergia fragrans
Smith, 1991; Wagner et al., 1990, 1999; Lorence & Wagner, 2020.
|Acanthaceae -- The Acanthus Family||Bibliography|
Common name(s): white thunbergia, sweet clock-vine
|Distribution||Native to India and Ceylon.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i. First collected On Kaua'i in 1916 (Forbes 611.K, BISH).|
|Habitat||Cultivated in Hawai'i, now natrualized at least on Kaua'i, O'ahu, Maui, and Hawai'i, but probably on all of the main islands.|
||Herbaceous, scrambling or climbing vine with slender sinistrorsely twining stems.
||Leaves petiolate; blade hastate-ovate, 3‒10 cm long, 1.5‒5 cm wide, broadly obtuse to truncate at base, margin subentire, often with pair of large teeth toward base; petiole unwinged, 0.5‒7 cm long.
||Inflorescences a solitary flower, axillary, pedicellate, subtended by 2 lanceolate to ovate bracts 13‒15 mm long. Flowers with 15‒16 calyx lobes; corolla white, tube 2‒2.5 cm long, limb 4‒5.5 cm across.
||Fruit 2.2‒2.5 cm long, body subglobose-didymous, 0.5‒0.7 cm long, 1 cm wide, beak flat, 1.5‒1.7 cm long.
||Seeds 2‒4, lenticular, biconvex, 5‒6 mm long, 3 mm wide, brown, surface rugose.
||Despite the specific epithet, flowers of this species are not noticeably fragrant at any time of day or night.