260 CAESALPINACEAE. [Vor II. 
4. GLEDITSIA L. Dp. HleeTOSen 1754: 
Large thorny trees, with evenly once or twice pinnate leaves, small stipules, and small 
greenish polygamous flowers in slender axillary spicate racemes. Calyx campanulate, 3-5- 
cleft. Petals 3-5, equal, sessile, inserted at the summit of the calyx-tube. Stamens 6-10, dis- 
tinct; anthers all alike, longitudinally dehiscent. Ovary rudimentary or none in the stami- 
nate flowers, in the fertile ones nearly sessile, elongated or ovoid. Ovules2-«. Pod linear 
or foval, flat, nearly straight, or twisted at maturity, coriaceous, tardily dehiscent, 1-seeded 
or many-seeded, pulpy between the seeds. [In honor of J. T. Gleditsch, 1714-1786, German 
botanist, the name often spelled Gleditschia.] - 
About 5 species, natives of eastern North America and Asia. 
Pod linear-oblong, elongated, many-seeded. 1. G. triacanthos. 
Pod obliquely oval, short, 1-seeded. 2. G. aquatica, 
1. Gleditsia triacanthos L,. Honey 
or Sweet Locust. Three-thorned 
Acacia. (Fig. 2041.) 
Gleditsia triacanthos \,. Sp. Pl. 1056. 1753. 
A large tree, with rough bark, maximum height 
about 140° and trunk diameter 54°, usually armed 
with numerous stout branching or simple thorns. 
Leaves petioled, 1-2-pinnate; leaflets short-stalked, 
oblong-lanceolate or oval, obtuse at each end, in- 
equilateral at the base, glabrous above, often pubes- 
cent on the veins beneath, crenulate, 8’’-15’’ long; 
racemes solitary or clustered, slender, drooping, 
dense, 3/—5’ long; flowers greenish, about 2’’ broad; 
pod linear-oblong, 1°-114° long, 1/-134’ wide, 
stalked, glabrous and shining, twisted, many- 
seeded, pulpy within, sometimes eaten. 
In woods, western New York and Ontario to Michi- 
gan, Georgia, Kansasand Texas. Naturalizedand ex- 
tensively planted further east. Wood durable, bright 
brownish-red; weight per cubic ft. 42 lbs. May-July. 
2. Gleditsia aquatica Marsh. Water or 
Swamp Locust. (Fig. 2042.) 
Gleditsia aquatica Marsh. Arb. Am. 54. 1785. 
Gleditsia monosperma Walt. Fl. Car. 254. 1788. 
A tree, with maximum height of about 60°, and 
trunk diameter of 2%°. Foliage similar to that of the 
preceding species, but the leaflets thicker, darker 
green, usually larger, ovate-lanceolate or lanceolate 
in outline, the margins more conspicuously crenulate; 
racemes drooping, elongated; pod obliquely oval, 
flat, glabrous, narrowed at each end, slender-stalked, 
1/-1¥%4’ long, 9//-12’/’ wide, 1-seeded, not pulpy 
within. 
In swamps, Indiana to Missouri, south to South Caro- 
lina, Florida and Louisiana. Wood very hard, bright 
reddish-brown; weight per cubic ft. 46 lbs. July. 
5. GYMNOCLADUS Lam. Encycl. 1: 733. 1783. 
Trees, with bipinnate leaves, and showy white dioecious or polygamous flowers in ter- 
minal racemes, Calyx tubular, 5-lobed, the lobes narrow, nearly equal. Petals 5 (rarely 4), 
oblong or oval, nearly equal, imbricated, inserted at the top of the calyx-tube. Stamens 10, 
distinct, shorter than the petals and inserted with them; filaments pubescent; anthers all 
alike, longitudinally dehiscent. Ovary rudimentary, or none in the staminate flowers, ses- 
sile and many-ovuled in the pistillate and polygamous ones; style straight. Pod oblong, 
thick, large, coriaceous, flat, pulpy between the seeds, 2-valved. [Greek, naked-branch. } 
A monotypic genus of eastern North America. 
