176 Proceedings of the Ohio State Academy of Science 



Bignoniaceae. Trumpet-creeper Family. 



73. Catalpa Scop. Catalpa. 



Trees or shrubs with opposite or verticillate simple leaves 

 and large white or mottled flowers in terminal panicles or 

 corymbs. Leaves with large nectar glands in the axils of the 

 veins on the under side. Capsule long and bean-like. 



1 . Young twigs glabrous or nearly so, leaf-blades downy below ; flow- 

 ers large, white, with "2 yellow stripes inside and spotted purplish 

 brown. 2. 



1 . Young twigs and petioles with long hairs ; leaf blades glabrous be- 



low or nearly so, commonly 3-lobed or angled, strong-scented ; 

 flowers small, yellow with orange stripes inside and violet spots ; 

 capsule very slender. C. ovata. 



2. Leaves strong-scented, young petioles glabrous or nearly so; wings 



of seed usually narrowed at the ends; panicles many-flowered; 

 lower corolla lobe entire ; bark thin, flaky. C. catalpa. 

 2. Leaves not unpleasantly scented, young petioles usually pubescent, 

 wings of seed usually broad, the threads parallel ; panicles few- 

 flowered ; lower corolla lobe emarginate ; bark thick and rough. 

 Usually blooms a week or more earlier than C. catalpa. C. speci- 

 osa. 



1. Catalpa catalpa (L.) Karst. Common Catalpa. A 

 tree with thin flaky bark and spreading branches. Wood much 

 less valuable than that of C. speciosa. The flowers are said to 

 produce irritation of the skin. Gulf States. Escaped in the 

 northern states as far as Ohio and N. Y. 



2. Catalpa speciosa Ward. Hardy Catalpa. A large 

 rapid-growing tree with thick rough bark. Wood light, soft, not 

 strong, brittle, of very coarse texture and brown in color, very 

 durable in the ground ; used for railroad ties, posts, furniture and 

 interior finish; also suitable for paper pulp. 111. to Tenn., Mo., 

 Ark., and Ohio. 



*. Catalpa ovata Don. Japan Catalpa. A small tree, com- 

 monly with 3-lobed or angled leaves. 



