Color, deep purplish red. Calyx, of 3 small, green sepals and 2 large, colored wings. Corolla of 3 petals, the keel crested. Stamens, 6 or 8. Leaves, scattered on stem, simple, entire, long, narrow. Fruit, a pod, flat and notched at the top. Flowers, clustered in a globular head, like clover, which elongates as it grows older. Stems, branched and leafy. June to September.
P. mariana.. - Color, rose purple. A slender, smooth species with flowers collected in button-like heads on pedicels. Lower flowers, with their bracts, fall soon, leaving the stem rough. Leaves, about 1/2 inch long, scattered on the stem, which is 6 to 16 inches high. July to September.
Dry or moist sandy soil, common, from southern New England to Florida and Texas.
P. Nuttallii - Color, greenish or dull purple. (See under Purple Flowers, p. 319.)