<p>In the research and development of constructed wetland technology, it is known that various plant species have the ability to remove waterborne pollutants. Therefore, this study aims to conduct a scientometric analysis of the use of emerging ornamental plants in constructed wetlands for wastewater treatment in tropical and subtropical regions. Through a systematic review, we identified ornamental plant species capable of removing water pollutants, the countries employing them, and their capacities for removing specific contaminants in different types of wetland systems. A search was conducted in key academic databases, using terms related to the use of ornamental plants in wetlands, their pollutant removal capacity, and the systems employed in tropical and subtropical regions. The studies included show that various ornamental plant species are capable of removing water pollutants. Configurations involving individual or combined species were identified. Finally, conclusions are presented to highlight gaps in the research and future opportunities, with the goal of creating a knowledge base to support the implementation of these systems in tropical and subtropical regions.</p>