Schwalbea americkna - Family, Figwort. Color, dull, yellowish purple. Calyx, tubular, 5-toothed, with a pair of bracts at its base. Corolla, 2-lipped, the upper lip entire, the lower 3-lobed, 2-plaited. Flowers, large, irregular, nearly or quite sessile, forming a terminal, loose spike. Stem, straight, slender, 1 to 2 feet high with few branches, glandular, and softly hairy. Leaves, entire, oblong to ovate, pointed at both ends, sessile, passing into linear bracts above. May to July.