"A Flora of Concord" by R.J. Eaton is a botanist’s compendium of plants known to have occurred without cultivation in Concord, with citations from Thoreau and his contemporaries, including Hoar, Minot Pratt and H Mann Jr.  Here you will find careful citations for many of the plants you see on your Concord property, noting where they were first identified and by whom.

Richard Eaton, a scientist born in 1903 who grew up in Concord when it was little changed from Thoreau’s time, was a president of the New England Botanical Club.

Example:
Plants native to the Estabrook Woods:
Wild Calla
Rue Anemone
Thimbleweed
White Baneberry
Downy Yellow Violet
Flowering Dogwood
Wild Licorice
Coral Honeysuckle
Pussy-toes

“ About half a dozen years ago I found myself attending to plants with more method . .  I began to bring them home in my hat . . . which I called my botany box.”
Thoreau