Bibliography of cultivated trees and shrubs hardy in the cooler temperate regions of the Northern Hemisphere - Rehder, Alfred, 1863 -1949 (Arnold Arboretum of Harvard Univ, 1949)

Florula bostoniensis. A collection of plants of Boston and its vicinity, with their generic and specific characters, principal synonyms, descriptions, places of growth, and time of flowering, and occasional remarks - Bigelow, Jacob, 1786 -1879 (C. C. Little and J. Brown, 1840)

Florula bostoniensis. A collection of plants of Boston and its vicinity, with their generic and specific characters, principal synonyms, descriptions, places of growth, and time of flowering, and occasional remarks - Bigelow, Jacob, 1786 -1879 (C. C. Little and J. Brown, 1840)

Plants of North America - Heller, Amos Arthur, 1867 -1944 (1892)

Plants of North America - Heller, Amos Arthur, 1867 -1944 (1892)