Bongard, A. G. H. 1832. Observations sur la végétation de l'île de Sitcha. Mém. Acad. Imp. Sci. Saint-Pétersbourg, sér. 6, Sci. Math. 2: 119-177.

Carrière, E. A. 1867. Traité général des conifèrs. Ed. 2. Published by the author, Paris.

Dietrich, A. G. 1824. Flora der Gegend um Berlin oder Aufzählung und Beschreibung der in der Mittelmark wild wachsenden und angebauten Pflanzen. In 2 parts. G. E. Nauck, Berlin.

Douglas, D. 1827. An account of a new species of Pinus, native of California. Transactions of the Linnean Society 15: 497-500.

Douglas, D. 1833. Description of a new species of the genus Pinus (P. Sabiniana). Transactions of the Linnean Society 16: 747-750.

Flora of North America Editorial Committee (ed.). 1993. Flora of North America north of Mexico. Volume 2. Oxford University Press, New York.

Forbes, J. 1833. Pinetum woburnense, or, a catalogue of coniferous plants, in the collection of the Duke of Bedord, at Worburn Abbey; systematically arranged. Printed by the author, London.22

Hitchcock, C. L., A. Cronquist, M. Ownbey & J. W. Thompson. 1969. Vascular plants of the Pacific Northwest. University of Washington Publication of Biology 17(1).

Lambert, A. B. 1832. A description of the genus Pinus, with directions relative to the cultivation, and remarks on the uses of the several species; also descriptions of many other new species of the family of Coniferae. Ed. 3, with "editio minor" by D. Don. In 2 volumes. Messrs. Weddell, London.23

Lawson, P. & C. Lawson. 1836. The Agriculturalist's Manual : being a description of the agricultural plants cultivated in Europe, including observations respecting those suited to the climate of Great Britain. Published by the authors, London.

Lewis, M. & W. Clark. 1814. History of the expedition under the command of Captains Lewis and Clark, to the sources of the Missouri, thence across the Rocky Mountains and down the River Columbia to the Pacific Ocean, performed during the years 1804-5-6. By order of the government of the United States. Prepared for the press by Paul Allen, Esquire. [Edited by Nicholas Biddle.] 2 vols. Bradford and Inskeep, Philadelphia.

Lindley, J. 1833. Abies. Penny Cycl. 1: 30-32.

Little, E. L., Jr. 1944. Notes on nomenclature in Pinaceae. American Journal of Botany 31: 587-596.

Loudon, J. C. 1838. Arboretum et fruticetum britannicum; or, the trees and shrubs of Britain, native and foreign, hardy and half-hardy, pictorially and botanically delineated, and scientifically and popularly described. 8 vols. Printed by the author, London.24

Mirbel, F. B. 1825. Essai sur la distribution géographique des conifères. Mémorie du Muséum d'Histoire Naturelle 13: 28-76.

Morwood, W. 1973. Traveler in a vanished landscape. The life & times of David Douglas, botanical explorer. Clarkson N. Potter Inc., Publisher. New York.

Moulton, G. E. (ed.). 2000. The journals of the Lewis & Clark expedition. Volume 6, The herbarium of the Lewis and Clark expedition. University of Nebraska Press, Lincoln.

Rehder, A. 1940. Abies procera, a new name for A. nobilis Lindl. Rhodora 42: 522-524.

Renkema, H. W. & J. Ardagh. 1930. Aylmer Bourke Lambert and his "Description of the genus Pinus." Journal of the Linnean Society of London, Botany. 48: 439-465.

Rydberg, P. A. 1917. Flora of the Rocky Mountains and adjacent plains. Published by the author, New York.

22. Only a hundred copies of this work were published. The Duke of Bedford probably intended the work as a presentation gift to visitors and certain botanists. It was published in May of 1839 and consists of 226 pages and 67 plates. James Forbes (173-1861) was the gardener at Woburn Abbey. Only a few copies exist today.

23. The placement of the insert, and the number of pages and plates associated with the unnumbered insert in this volume, varies from copy to copy. In fact it is lacking in some (Renkema & Ardagh 1930; Little 1944). It is therefore possible the unnumbered pages were distributed after the book was actually published. All attempts to more accurately date this work have failed. For nomenclatural reasons, one now has to assume the third edition of Lambert book was published sometime after Bongard's paper in August of 1832 but before Rafinesque's paper was published in (probably) October of 1832. Needless to say, determining when Lambert's book was actually published is now critical.

24. This work was actually published in 68 parts from Jan 1835 until Jul 1838. I have not been able to determine an exact date for the publication of the scientific names of the conifers attributed to Douglas by Loudon. All of the names appeared in volume 4 (pages 2031-2694) and it may well be that 1838 is the correct year. I am not certain if the illustrations (vols. 5-8) appeared with the text or were published at a different time.