130 KEY AND FLORA 



racemes at the ends of the branches. Calyx tube rather long, 

 its 5 lobes spreading. Petals oblong, all alike, inserted with 

 the stamens on the throat of the calyx. Stamens of the fertile 

 flowers usually not pollen-bearing. Pod hard, flat, partly filled 

 with a sweet substance, slow in opening. Seeds several, flattish, 

 over in. in diameter, very hard and shining. 



1. G. dioica Koch. KENTUCKY COFFEE TREE. Tree 50 ft. or more 

 in height, with rough gray bark. Leaves 2-3 ft. long, the leaflets 

 vertical. Pods sometimes nearly 1 ft. long. Rich soil and river bot- 

 toms, especially S. and W. 



IV. GLEDITSIA L. 



Large trees ; bark dark-colored, nearly smooth. Leaves 

 usually pinnately twice compound ; leaflets serrate. Flowers 

 somewhat monoscious, in small spike-like racemes. Calyx 

 spreading, 3-5-cleft. Petals as many as the sepals and in- 

 serted at the summit of the tube. Stamens 5-10, distinct, 

 inserted with the petals. Ovary nearly sessile, ovoid or 

 elongated. Fruit a 1-or many-seeded, leathery pod.* 



1. G. triacanthos L. HONEY LOCUST. A large tree, usually armed 

 with stout, branched thorns, which are sometimes a foot or more in 

 length. Leaves petioled ; leaflets short-stalked, lanceolate-oblong, 

 base inequilateral, smooth above, often downy below. Racemes soli- 

 tary or in small clusters, drooping. Flowers inconspicuous, greenish. 

 Pod linear-oblong, often 12-15 in. long by 1 in. wide, twisted, many- 

 seeded, smooth and shiny, pulpy within. In rich woods. 



V. CERCIS L. 



Trees. Leaves simple, with stipules. Flowers in axillary clus- 

 ters, somewhat papilionaceous. Calyx bell-shaped, 5-toothed. 

 Stamens 10, distinct. Ovary short-stalked; ovules several. 

 Fruit a flattened pod. 



1. C. canadensis L. REDBUD. A small tree, 10-20 ft. high; wood 

 hard but weak; bark smooth, dark-colored. Leaves broadly cordate, 

 abruptly acute, rather thick, very smooth above, often slightly downy 

 below. Flowers several in a cluster, appearing before the leaves, 

 pinkish-purple. Pod oblong, compressed', many-seeded. Common on 

 rich soil, especially S.* 



