Rhexia lutea, a Southeast US perennial herb, has square stems and yellow, four-petaled flowers with prominent stamens, blooming in summer in wet bogs.
Above information is sourced from Wikipedia
© Pauline Singleton (CC-BY-NC)
© no rights reserved
© (c) Farren Dell Rossman, some rights reserved (CC BY)
© (c) er-birds, some rights reserved (CC BY)
