Chickasaw plum grows tall and wide in an irregular shape. It is "twiggy" in nature, and has a scaly, almost black
bark. Its branches are reddish with thornlike, small side branches. In February, March, April and May, small white flowers blossom, wide, along with red plums, up to long. The flowers have five white petals with reddish or orange anthers. The plums are cherry-like and tend to be quite tart until they fully ripen. They ripen in late summer. It requires low to medium amounts of water to grow, and dry, sandy or loose soil. It grows best in areas with regular sunlight or areas of partial shade. In sunny areas, it will be more dense and colonize thickly. In areas of partial shade, it will be thinner and less dense, and each plant will be more spread out.
P. angustifolia is very difficult to distinguish from
P. umbellata, with which it
hybridizes easily. ==Taxonomy==