Westlicher Knopfbusch (German Wikipedia)

Analysis of information sources in references of the Wikipedia article "Westlicher Knopfbusch" in German language version.

refsWebsite
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1st place
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394th place
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67th place

ars-grin.gov

npgsweb.ars-grin.gov

  • Cephalanthus occidentalis im Germplasm Resources Information Network (GRIN), USDA, ARS, National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Abgerufen am 24. Juli 2019.

books.google.com

  • Penelope O’Sullivan: The Homeowner's Complete Tree & Shrub Handbook: The Essential Guide to Choosing, Planting, and Maintaining Perfect Landscape Plants. Storey Publishing, 2007, ISBN 978-1-58017-571-5 (google.com).

doi.org

  • Fiona M. Imbert, Jennifer H. Richards: Protandry, Incompatibility, and Secondary Pollen Presentation in Cephalanthus occidentalis (Rubiaceae). In: American Journal of Botany. Vol. 80, No. 4, 1993, S. 395–404, doi:10.2307/2445386.
  • John K. Francis: Wildland Shrubs of the United States and its Territories: Thamnic Descriptions. Band 1. USDA Forest Service, 2004, S. 170 f., doi:10.2737/IITF-GTR-26. (PDF; 21 MB).

kew.org

powo.science.kew.org

  • Cephalanthus occidentalis. In: POWO = Plants of the World Online von Board of Trustees of the Royal Botanic Gardens, Kew: Kew Science, abgerufen am 24. Juli 2019.

redirecter.toolforge.org

  • Cephalanthus occidentalis. In: Fire Effects Information System = FEIS. United States Forest Service, archiviert vom Original (nicht mehr online verfügbar); abgerufen am 12. November 2022.

tropicos.org

usda.gov

plants.usda.gov

fs.usda.gov

  • Elbert L. Little: Minor Western Hardwoods (= Atlas of United States Trees. Band 3). US Government Printing Office, 1976, Map 34-NW, Map 34-SW, Cephalanthus occidentalis. (online)

web.archive.org

  • Cephalanthus occidentalis. In: Fire Effects Information System = FEIS. United States Forest Service, archiviert vom Original (nicht mehr online verfügbar); abgerufen am 12. November 2022.