Scarlet Pimpernel (Poor Man’s Weatherglass)
A tender annual, branched from the base, with square stems. Flowers terminal and arising singly on long stems from leaf axils; petals united at base as a very short tube, deeply 5-lobed; less than ½ inch wide; scarlet or brick-red, rarely white or bluish. Blooms May-September. Leaves opposite, stalkless, ovate, with dots underneath, with or without hairs, to ¾ inch long. Fruit a tiny, round capsule that opens its “lid” to disperse seeds.