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 monoecious, 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.* . 



