biostudies-literatureTungmunnithum DThis research was funded by Agricultural Research Development Agency (Public Organization).952https://www.ebi.ac.uk/biostudies/studies/S-EPMC9138080biostudies-literatureUnknown11(5)Plants of the genus <i>Monochoria</i> have long been utilized in food, cosmetics, and traditional herbal treatments. Thailand has the highest species diversity of this genus and a new member, <i>Monochoria angustifolia</i> (G. X. Wang) Boonkerd & Tungmunnithum has been recently described. This plant is called "Siam Violet Pearl" as a common name or "Khimuk Si Muang Haeng Siam" as its vernacular name with the same meaning in the Thai language. Despite their importance, little research on <i>Monochoria</i> species has been conducted. This study, thus, provides the results to fill in this gap by: (i) determining flavonoid phytochemical profiles of 25 natural populations of <i>M. angustifolia</i> covering the whole floristic regions in Thailand, and (ii) determining antioxidant activity using Antioxidants (Basel, Switzerland)Flavonoid Profiles and Antioxidant Potential of <i>Monochoria angustifolia</i> (G. X. Wang) Boonkerd & Tungmunnithum, a New Species from the Genus <i>Monochoria</i> C. Presl.PMC9138080Agricultural Research Development Agency (Public Organization)Lorenzo JMDrouet SGarros LHano CTungmunnithum DfalseFlavonoid Profiles and Antioxidant Potential of <i>Monochoria angustifolia</i> (G. X. Wang) Boonkerd & Tungmunnithum, a New Species from the Genus <i>Monochoria</i> C. Presl.Plants of the genus <i>Monochoria</i> have long been utilized in food, cosmetics, and traditional herbal treatments. Thailand has the highest species diversity of this genus and a new member, <i>Monochoria angustifolia</i> (G. X. Wang) Boonkerd & Tungmunnithum has been recently described. This plant is called "Siam Violet Pearl" as a common name or "Khimuk Si Muang Haeng Siam" as its vernacular name with the same meaning in the Thai language. Despite their importance, little research on <i>Monochoria</i> species has been conducted. This study, thus, provides the results to fill in this gap by: (i) determining flavonoid phytochemical profiles of 25 natural populations of <i>M. angustifolia</i> covering the whole floristic regions in Thailand, and (ii) determining antioxidant activity using 2022-01-01T00:00:00Z2022 May2025-04-21T17:27:24.199Z2025-04-05T16:40:24.954ZS-EPMC91380803562481610.3390/antiox11050952