Nelsonia (plant)

Nelsonia is a genus of plants in the family Acanthaceae. They can be found in tropical: Africa (including Madagascar), Latin America, south-east Asia and Australia.

Species
As of February 2024, Plants of the World Online accepts three species:
 * Nelsonia canescens (Lam.) Spreng.
 * Nelsonia gracilis Vollesen
 * Nelsonia smithii Oerst.

Synonyms and obsolete taxa
The Plant List (9 October 2012) listed the following species names:
 * Nelsonia albicans Kunth = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia brunelloides (Lam.) Kuntze = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia campestris R.Br. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia campestris var. vestita (Roem. & Schult.) C.B. Clarke = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia canescens var. smithii (Oerst.) E.Hossain = Nelsonia smithii Oerst. (1854)
 * Nelsonia canescens var. vestita (Roem. & Schult.) E. Hossain = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia hirsuta (Vahl) Roem. & Schult. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia lamiifolia (Roxb.) Spreng. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia origanoides (Vahl) Roem. & Schult. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia pohlii Nees = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia rotundifolia R.Br. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia senegalensis Oerst. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia tomentosa A. Dietr. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia vestita Schult. = Nelsonia canescens (Lam.) Spreng. (1824)
 * Nelsonia villosa Oerst. = Nelsonia canescens (Lam.) Spreng. (1824)