The two North American species, Southern Catalpa (Catalpa bignonioides), and Northern Catalpa (Catalpa speciosa) have been widely planted outside their natural ranges as ornamental trees for their showy flowers and attractive shape, or growing habit. More About this Tree Southern Catalpa (Catalpa bignonioides) A very showy tree with large creamy flowers and cordate leaves. [8], It prefers moist soil and full sun. Stamens: Two, rarely four, inserted near the base of the corolla, introrse, slightly exserted; anthers oblong, two-celled, opening longitudinally; filaments flattened, thread-like. The flower is perfect, possessing both stamens and pistils; nevertheless, the law of elimination is at work and of the five stamens that are expected to be found, three have aborted, ceased to bear anthers and have become filaments simply. are tough. Catalpa worms are the fish-bait of choice for many anglers here in the south. Clusters of dark glands, which secrete nectar are found in the axils of the primary veins. When severe, the leaves yellow and fall off. There are two species of catalpa: southern and northern. Catalpa is deciduous tree that belongs to the Bignonia family. Winter reveals its arching, twisted branches. Pistil: Ovary superior, two-celled; style long, thread-like, with a two-lipped stigma. Leaf spots are rarely serious so no chemical control is suggested. It is easily raised from seeds which germinate early in the first season. Catalpa bignonioides is a species of Catalpa that is native to the southeastern United States in Alabama, Florida, Georgia, Louisiana, and Mississippi. Catalpa is a Midwest native tree grows 40 to 60 feet tall, with a narrow, open, irregularly rounded crown and spreading branches. Catalpa, Southern (Catalpa bignonioides) A: M: M: Will grow in just about any soil. Young catalpa trees are beautiful green standouts with giant green leaves that can sometimes be confused with tung trees and royal paulownia in the southern U.S. Catalpa seedlings are somewhat available, but you may have to go out of your region to find the tree. The roots are fibrous and branches are brittle, its juices are watery and bitter tasting. The Southern Catalpa tree (Catalpa bignonioides) is a native American tree that is also known as the Indian Bean, Bean Tree, Fish Bait, Catawba and the Cigar Tree. I don't know if the catalpa in these photos is a southern catalpa (Catalpa bigenoides) or a northern catalpa (Catalpa speciosa). The tree itself grows extremely fast and tall. The leaves grow three at each node on the twig in a whorled pattern and are a dull shade of green above with a hairy pale underside. Because of the shape of the leaves, the Southern Catalpa was used for heart illnesses by Native American medicine men. It has large, heart-shaped leaves and large clusters of fragrant, white flowers. The only food supply for the Catalpa worm/caterpillar is the leaves of the Catalpa tree. From scale fish to catfish. They turn dark and fall after the first severe frost. Southern Catalpa is a powerful bloomer with a unique contorted form. It is a fast growing tree which prefers moist, well drained, alkaline soil, but can tolerate a range of soil types (this is why it could be, to some, considered a weedy plant). Catalpa Tree - Photo by Paul Wray, Iowa State University. In the winter, the Southern Catalpa develops many large seedpods. The fruit is a long, thin bean pod like capsule 20–40 cm long and 8–10 mm diameter; it often stays attached to tree during winter. When caterpillars are numerous, infested trees may be completely defoliated. A full grown Chinese catalpa, down near the Stone Arch Bridge in SE Minneapolis The Southern Catalpa is botanically called Catalpa bignonioides. It was a special tree in china because its wood was used to make the bottom of the qin, a traditional Chinese instrument. These cover the tree so thickly as almost to conceal the full grown leaves. It can be made into a tea that is an antidote for snake bites and has also used for a laxative. Powdery mildew causes a white powdery coating on the leaves. Northern catalpa is slightly larger and has bigger leaves, flowers and fruit. When bruised they give a disagreeable odor. Severe defoliation over several consecutive years can cause death of trees. The wood is brittle and hard, but does not rot easily; it is used for fence posts and railroad ties. They secrete nectar, a most unusual characteristic for leaves, by means of groups of tiny glands in the axils of the primary veins. Then, too, the flowers refuse to be self-fertilized. Catalpa speciosa (Northern Catalpa) grows in a loose oval, 60 feet tall in most urban locations, but occasionally grows to 90 feet. 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