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Prepared by Richard W. Spjut
Robinia pseudoacacia Linnaeus 1753. Black locust. An introduced tree native to the eastern U.S.; leaves pinnately divided into numerous leaflets; flowering in the spring, the white flowers dangling in long axillary racemes, fruit broad linear, flat, 5–10 cm long, slightly constricted between the seeds, opening by two valves. Reported by Twisselmann to be widely planted and frequently spontaneous with reference to locations at Buena Vista Slough north of Tupman and Hart Park. Occurs locally along the old Kern Canyon Road (pers. obs.).