Changed "Isoëtes" to "Isoetes" on page viii: "Quillworts (Isoetes)."
Changed "liquifies" to "liquefies" on page 21: "as it liquefies."
Changed "frame-work" to "framework" on page 52: "the framework or skeleton."
Changed "leafstalk" to "leaf-stalk" in three places: the caption to figure 74; on page 71: "bent upon the leaf-stalk;" in the index entry for "Petiolulate."
Changed "Honey Locust" to "Honey-Locust" in the caption to figure 95: "branching thorn of Honey-Locust."
Page 47 has a reference to Fig. 89, which does not seem to follow from the text. "Fig. 80" would make more sense, but the original was not changed.
Changed "Linnaeus" to "Linnæus" on page 50: "Linnæus called Nerves."
Removed extra comma before closing parenthesis on page 51: "the Maple (Fig. 20, 24)."
Changed "Sugar-Maple" to "Sugar Maple" on page 58: "that of the Sugar Maple."
Changed "quadrifoliate" to "quadrifoliolate" on page 59: "trifoliolate, quadrifoliolate, plurifoliolate."