Credit: unknown | http://www.nps.gov/a... | License: PD US NPS

Credit: USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 33. | USDA | License: PD USDA

Credit: I.Sá?ek, senior | Own work | License: PD

Credit: Wouter Hagens | Own work | License: CC-BY-SA-3.0,2.5,2.0,1.0 GFDL

Credit: Sten Porse | Own photo, taken in Jutland | License: CC-BY-SA-2.5,2.0,1.0 CC-BY-SA-3.0-migrated GFDL

Credit: Wouter Hagens | Own work | License: CC-BY-SA-3.0,2.5,2.0,1.0 GFDL

Credit: Henry Brisse (upload by user:Abalg) | from the aforementioned site | License: CC-BY-SA-3.0-migrated GFDL

Credit: NRCS | http://www.mt.nrcs.u... | License: PD USDA

Credit: Kor!An (?????? ?????... | Own work | License: CC-BY-SA-3.0-migrated GFDL

Credit: Me | Ik nam deze foto bij kwekerij esveld.This photo or other media was taken with permission on location: kwekerij esveldThe permission was obtained on the condition that the location was specificed on upload. This condition does not apply to subsequent publications of the media, and poses no additional restriction on modification or distribution as detailed in the license.Mentioning this location when the image is used in a wikipedia article, or elsewhere, is encouraged but not obligatory. | License: CC-BY-SA-3.0-migrated GFDL

Credit: Jacob Sturm (?) | scanned from book 20 apr 2009 | License: PD Old

Credit: Tracey Slotta | USDA ARS/GRIN | License: PD USGS

Credit: Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 90. | USDA | License: PD USDA

Credit: Herman, D.E. et al. 1996. North Dakota tree handbook. USDA NRCS ND State Soil Conservation Committee; NDSU Extension and Western Area Power Admin., Bismarck, ND. | USDA | License: PD USDA

Credit: Jmeeter | Own work by uploader | License: CC-BY-SA-3.0 GFDL

Credit: Walter Siegmund (talk) | Own work | License: CC-BY-SA-3.0,2.5,2.0,1.0 GFDL

Credit: Original uploader was Marknesbitt at en.wikipedia (January 2006). Later uploaded by Jeannot12 at fr.wikipedia (December 2006) | (See above.)Transferred from fr.wikipedia; transferred to Commons by User:Crochet.david using CommonsHelper.Originally uploaded 06:55, 18 January 2006 (UTC) by Marknesbitt (talk • contribs) to en:Wikipedia (log). | License: PD USDA ARS

Credit: USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 361. | USDA PLANTS Database | License: PD USDA PD USDA NRCS

Credit: USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 209. | USDA | License: PD USDA