Common name: Black-eyed Susan
Thunbergia alata Bojer ex Sims APNI*
Description: Herbaceous perennial twiner.
Leaves ± ovate, 20–70 mm long, 10–45 mm wide, base hastate to sagittate, margins entire or toothed, both surfaces strigose; petiole 15–40 mm long.
Flowers solitary in axils; peduncles 30–60 mm long; bracteoles 12–15 mm long, fused along one margin. Calyx 12-lobed. Corolla orange or yellow, rarely white, usually with black centre; tube 15–25 mm long; lobes 10–15 mm long.
Capsule tomentose; with a globose seed-bearing base 5–7 mm long and beak 9–15 mm long; seeds c. 4 mm diam.
Flowering: all year.
Distribution and occurrence: Usually grows in moister positions, north from Casula; often cultivated, only occasionally naturalized as rarely sets seeds in non-tropical regions. Native of Afr.
NSW subdivisions: *NC, *CC, *SC
Other Australian states: *Qld
Text by J. Everett
Taxon concept: Flora of NSW 3 (1992)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.