Identifying Northern Catalpa from Its Seed Pods

Tree Identification

The long, green, bean-like seed pods (10–18 inches) growing in clusters near St. Louis, MO, in late May or early June belong to the northern catalpa (Catalpa speciosa).

Key Characteristics

• Leaves: Whorled or opposite, heart-shaped, 5–12 inches long, soft and flexible.
• Flowers: Showy white bells with yellow and purple spots, in upright clusters (8–12 inches) in late spring.
• Fruit: Stiff, round capsules 10–18 inches long, persisting into winter.
• Bark: Gray to reddish-brown, shallow fissures and scaly ridges.
• Form: Medium-sized tree to 80 feet with crooked branches and irregular crown.

For photos, see: Vanderbilt Bioimages.