Thunbergia alata Sims Acanthaceae. Black-eyed Susan. Tender, perennial herbaceous climbing plant. Distribution: East Africa. Named for Carl Peter (Pehr or Per) Thunberg (1743-1828), doctor, botanist, student of Linnaeus who collected plants in Japan, Sri Lanka and South Africa. He published Flora Japonica (1784)

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Thunbergia alata Sims Acanthaceae. Black-eyed Susan. Tender, perennial herbaceous climbing plant. Distribution: East Africa. Named for Carl Peter (Pehr or Per) Thunberg (1743-1828), doctor, botanist, student of Linnaeus who collected plants in Japan, Sri Lanka and South Africa. He published Flora Japonica (1784). Dr Henry Oakeley. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.