Proceeding's of the Ohio State Academy of Science 161 



46. Gymnocladus Lam. Coffee-bean. 



Trees with large evenly bipinnate leaves, superposed buds 

 sunken in the epidermis, and large chocolate-colored pith. Fruit 

 a woody bean. 



I. Gymnocladus dioica (L.) Koch. Coffee-bean. A 

 large, slow-growing tree with rough bark and few branches. 

 Bean short and thick, the greenish pulp within poisonous. The 

 bruised leaves are used as a fly poison, and the seeds have been 

 used as a substitute for coffee. Wood compact, heavy, hard, 

 strong, tough, reddish in color, of coarse texture, and taking a 

 good polish ; used to some extent in cabinet-work. In rich soil. 

 Ont to Ohio and Penn., Tenn., S. Dak., and Okl. 



Papilionatae. Pea Subfamily. 

 47. Cladrastis Raf. Yellow-wood. 



Trees with odd pinnate leaves and showy, fragrant, white 

 flowers. Axillary buds superposed, covered by the base of the 

 petiole. Fruit a slender bean. 



I. Cladrastis lutea (Mx.) Koch. American Yellow-wood. 

 Trees with smooth bark, close like in the beech. Wood light- 

 yellow. In rich soil; much planted. Ky., Mo., Tenn., and N. 

 Car. 



48. Robinia L. Locust. 



Trees or shrubs with odd-pinnate leaves and usually with 

 spiny stipules. Fruit a bean. 



1. Twigs, petioles and pods glabrous or nearly so; flowers white. P. 



pseudacacia. 

 1. Twigs and petioles glandular; pods hispid; flowers pinkish. P. 



viscosa. 



I. Robinia pseudacacia L. Common Locust. A large 

 slender tree with very rough bark, of rapid growth. Wood very 

 heavy, hard, strong, tough, valuable, and very durable in contact 

 with the ground ; used for posts, railroad ties, wagon hubs, furni- 

 ture, and in ship building. All parts of the plant very poisonous. 



