This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Rhexia virginica L. Sp. Pl. 346. 1753. Rhexia latifolia Bush, Rhodora 13: 167. 1911.
Stem rather stout, simple or branched above, square, the angles often slightly winged, more or less pubescent, 1°-1 1/2° high. Leaves ascending, sessile or short-petioled, ovate or ovate-oval, acute or acutish at the apex, rounded or rarely narrowed at the base, 1'-2' long, 6"-12" wide, usually with a few scattered hairs on both surfaces, mostly 5-nerved, the margins ciliate-serrulate; flowers bright purple, cymose, short-pedicelled, 1'-1 1/2 broad; calyx-tube and pedicels glandular-pubescent; petals rounded or slightly retuse; anthers linear, curved, minutely spurred on the back.
Stem square, slender, glabrous, branched or simple 1 1/2°-2° high. Leaves sessile, erect, oblong or linear-oblong, obtusish at each end, 9'-15" long, 1 1/2"-3" wide, 3-nerved, serrate toward the apex with appressed subulate teeth. glabrous or very nearly so beneath, but with a few scattered hairs above; flowers 1-4 together, short-pedicelled, magenta-red, 1'-1 1/2' broad; summit of the calyx-tube and its linear lobes with scattered subulate hairs; petals rounded, but obtusely pointed and aristate at the apex; anthers linear, minutely spurred on the back.
Stem square, glabrous, simple or nearly so, 1°-2° high. Leaves ascending, ovate, very short-petioled, or sessile, acutish at the apex, mostly rounded at the base, 6"-10" long, 4"-6" wide, 3-nerved, glabrous or nearly so beneath, pubescent with a few scattered hairs above, the margins bristly-ciliate; cyme few-flowered; flowers very short-pedicelled, violet-purple, 1'-1 1/2' broad; calyx glabrous, or with a few hairs on its lobes; petals rounded, sometimes apiculate; anthers oblong, straight, back not spurred.
In swamps, Maryland to Florida and Louisiana. June-Aug.