Large tree greater than 15 meters tall liberally covered with thorns. Differentiated from other thorny trees by presence of hesperidia and trifoliate leaves.
Small shrub differentiated from yellow honeysuckle by scent of flower (not collected due to insufficient number), ID confirmed with J. Gore, S. Schratz, ASU teaching specimens.
Very large tree approximately 20 meters tall with fading leaves, most fruits already dropped. Fruit is a green elongated capsule, was used to differentiate from Catalpa speciosa. Differentiated from Campsis radicans by that species's vine habit.
Large tree greater than 15 meters tall liberally covered with thorns. Differentiated from other thorny trees by presence of hesperidia and trifoliate leaves.
Tall, slender shrub approx. 10 feet tall. Trunk covered in prickles with many in ringlets. Leaves bi-pinnately compound and some with prickles. Fruit dark purple and in an umbel.