Note 122 — Chapter IV · A DECADE OF WORK AT HOME. 1840-1850.
Reading edition
A Flora of North America; containing abridged descriptions of all the known indigenous and naturalized plants growing north of Mexico; arranged according to the natural system. By John Torrey and Asa Gray. New York. 8vo; vol. i., 1838-1840, pp. xvi, 711; vol. ii., 1841-1843, pp. 504.