You selected a Black Locust:
Scientific Name:
Robinia pseudacacia L.
Leaves:
Pinnately compound, 6-12 in. 7-19 egg-shaped leaflets, 1-2 in., paired except at end. Without teeth.
Flowers:
White, fragrant, showy, ¾ - 1 in. Large clusters 4-8 in. long. 5 unequal petals. May-June.
Buds:
Small short side buds. Lacks terminal bud.
Bark:
Grey with reddish tinge. Deeply grooved bark with interlacing ridges.
Height:
40-80 ft
Diameter:
1-3 ft
Range:
Central and southern U.S. Naturalized in New England. Native to North America but not to Vermont
Other Info:
Very rot-resistant wood. 2-4 in. flat pods containing dark brown seeds which mature in autumn. Thorny branches