Large-flowered Sensitive Plant: Cassia Chamaecrista. Pulse Family. July - Sept. A plant 1 - 2 feet tall, found in dry or sandy fields. Massachusetts to Minnesota and southward.
Yellow, 5-parted, about 1 inch across, 2 - 4 from the bases of the leaves.
Composed of 10 - 15 pairs of leaflets.
Flowers yellow, divisions 5, 3 forming an upper lip, 2 a lower one. Leaflets 5 - 9 pairs. 3 - 8 feet high. Moist soil, swamps. New England to Ohio, Tennessee, and North Carolina.