217 
able in the ground, but experience proves that the heart wood is 
about as durable as white oak, while the sap wood decays very 
rapidly. Used for fence posts. 
Horticultural value. It is frequently used for ornamental plant- 
ing. It is adapted to all kinds of soil, although its preference is 
for a moist soil, grows rapidly and is free from disease. Nursery- 
men now offer a thornless variety which is preferred to the native 
tree. 
2. Gleditsia aquatica Marshall. Honey Locust. THoRN Tren. 
Plate 104. Bark smoothish, dull gray; twigs yellowish-brown turn- 
ing to a gray or reddish-brown, thorns simple or with one or two 
short branches; leaves pinnate or twice pinnate; flowers similar to 
the preceding species; fruit 3-5 em. (114-2 inches) long and 1.5-2 em. 
(34-1 inch) wide, one seeded, rarely two. 
Distribution. Southern Illinois and Indiana, south to the Gulf 
States and west to Texas. Rare and local in its general  distribu- 
tion and in Indiana confined to a few localities in the extreme 
southwestern counties where it is found in sloughs and cypress 
swamps. 
The published records of the distribution are as follows: Gibson 
(Schneck); Knox (Ridgway) and (Thomas); Miami (Gorby) ;* Posey 
(Schneck). 
Additional records are: Knox (Schneck). 
Economic uses. ‘Too rare to be of any economic importance. 
3. GYMNOCLADUS. Tue Correr TREE. 
(From the Greek, gymnos naked, klados, branch; in reference to the naked appearance of the tree in 
the winter condition). 
Gymnocladus dioica (Linneus) Koch. Correenur Tree. Plate 
105. Bark of the trunk deeply fissured, dark gray; twigs at first 
hairy, at length smooth, brown or gray, splotched with brown; 
leaves twice pinnate, 3-9 dm. (12-86 inches) long, 4-6 dm. (16-24 
inches) wide; leaflets ovate, 3-6 em. (1144-214 inches) long; flowers 
appear in May, in whitish terminal racemes, the staminate in clus- 
ters, 7-10 em. (234-4 inches) long, the pistillate in racemes 2-3 dm. 
(4-12 inches) long; fruit a pod about 1.5 dm. (6 inches) long. seeds 
imbedded in a dark-colored sweet pulp. 
Distribution. Southern Ontario and central New York, south to 
Tennessee and west to eastern Nebraska and Oklahoma. No doubt 
*This record is evidently an error. 
