Buttonwood

On the opposite bank was a fresh ’gator wallow. The mud had been packed smooth where they turned and rolled their hard bodies. Penny dropped to his haunches behind a buttonwood bush.

Source: wiktionary

1824, Washington Irving (as Geoffrey Crayon), “Wolfert Webber, or Golden Dreams” in Tales of a Traveller, Volume 2, Part 4, Philadelphia: H.C. Carey & I. Lea, p. 55, Thus quietly and comfortably did this excellent family vegetate under the shade of a mighty buttonwood tree, which by little and little grew so great as entirely to overshadow their palace.

Source: wiktionary

1835, Fanny Kemble, Journal of a Residence in America, Paris: A. and W. Galignani, entry dated Sunday, 13 January, 1833, p. 234, When near, the trees look singularly deplorable and untidy, although at the distance, the red-brown of the faded oaks mingling with the bright, vivid, green cedars, and here and there a silver-barked buttonwood tree raising its white delicate branches from among them, produce a very agreeable and harmonious blending to the eye.

Source: wiktionary