Res. 3855 ak
Gray, Asa.
Genera florae americae borealj-orientalis il- lustrata = The genera of the plants of the Uni- ted States.
Illustrated... by Isaac Sprague; superintended| and with descriptions, &c., by Asa Gray.
Boston: James Monroe and Company; New York and London: John Wiley, 1848.
2 v. 3 186 leaves of plates.
LCxx.