Catalpa speciosa (northern catalpa)
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- Leaves opposite or whorled; blades very large, heart-shaped, apex long-acuminate, entire
- Fruit capsules long, thing, cigar-shaped
- Twigs with large, opposite or whorled leaf scars
- Seeds with rounded hair-tipped wings
Sourced from page 347 in "Michigan Trees"
Many come from Steve Baskauf at Vanderbilt University